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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
hep-ph/0012343
|
Takeo Matsushima
|
Takeo Matsushima
|
Scalar partner of $Z^0$-boson with larger mass value than $Z^0$-boson
mass in Subquark model
|
21 pages, 2 figures
| null | null |
TMI-00-2
|
hep-ph
| null |
The subquark model previously proposed by us showes that the intermediate
$Z^0$-boson is realized as the composite object and its scalar partner has the
mass value larger than $Z^0$-boson mass, which is about 110 GeV.
|
[
{
"created": "Wed, 27 Dec 2000 09:02:21 GMT",
"version": "v1"
}
] |
2016-09-06
|
[
[
"Matsushima",
"Takeo",
""
]
] |
The subquark model previously proposed by us showes that the intermediate $Z^0$-boson is realized as the composite object and its scalar partner has the mass value larger than $Z^0$-boson mass, which is about 110 GeV.
|
1409.1321
|
Mikhail Zubkov Dr
|
M.A. Zubkov
|
Schwinger - Dyson equation and NJL approximation in massive gauge theory
with fermions
|
Latex, 16 pages, published version
|
Annals of Physics 354 (2015), pp. 72-88
|
10.1016/j.aop.2014.12.007
| null |
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We consider massive $SU(N)$ gauge theory with fermions. Gauge bosons become
massive due to the interaction with the scalar field, whose vacuum average
provides the spontaneous breakdown of gauge symmetry. We investigate Dyson -
Schwinger equation for the fermion propagator written in ladder approximation
and in Landau gauge. Our analysis demonstrates that the chiral symmetry
breaking in the considered theory is the strong coupling phenomenon. There are
the indications that there appears the second order phase transition between
chirally broken and symmetric phases of the theory at the value of coupling
constant $\alpha_c = (1+\gamma)\times \frac{\pi}{3}\times \frac{1}{2 C_2(F)}$,
where $0<\gamma<1$, and $\gamma$ depends on the scale, at which the
fluctuations of the scalar field destroy the gauge boson mass. In the broken
phase near the critical value of $\alpha$ the Dyson - Schwinger equation is
approximated well by the gap equation of the effective Nambu - Joina - Lasinio
model with the value of cutoff around gauge boson mass $M$ and the effective
four - fermion coupling constant $\frac{4 \pi \alpha}{M^2}\times
\frac{2C_2(F)}{N}$. The dynamical fermion mass $m$ may be essentially smaller
than $M$.
|
[
{
"created": "Thu, 4 Sep 2014 05:28:42 GMT",
"version": "v1"
},
{
"created": "Fri, 12 Sep 2014 19:58:06 GMT",
"version": "v2"
},
{
"created": "Fri, 19 Sep 2014 09:16:47 GMT",
"version": "v3"
},
{
"created": "Mon, 22 Sep 2014 00:37:57 GMT",
"version": "v4"
},
{
"created": "Mon, 5 Jan 2015 16:44:16 GMT",
"version": "v5"
}
] |
2015-01-06
|
[
[
"Zubkov",
"M. A.",
""
]
] |
We consider massive $SU(N)$ gauge theory with fermions. Gauge bosons become massive due to the interaction with the scalar field, whose vacuum average provides the spontaneous breakdown of gauge symmetry. We investigate Dyson - Schwinger equation for the fermion propagator written in ladder approximation and in Landau gauge. Our analysis demonstrates that the chiral symmetry breaking in the considered theory is the strong coupling phenomenon. There are the indications that there appears the second order phase transition between chirally broken and symmetric phases of the theory at the value of coupling constant $\alpha_c = (1+\gamma)\times \frac{\pi}{3}\times \frac{1}{2 C_2(F)}$, where $0<\gamma<1$, and $\gamma$ depends on the scale, at which the fluctuations of the scalar field destroy the gauge boson mass. In the broken phase near the critical value of $\alpha$ the Dyson - Schwinger equation is approximated well by the gap equation of the effective Nambu - Joina - Lasinio model with the value of cutoff around gauge boson mass $M$ and the effective four - fermion coupling constant $\frac{4 \pi \alpha}{M^2}\times \frac{2C_2(F)}{N}$. The dynamical fermion mass $m$ may be essentially smaller than $M$.
|
1612.02071
|
Byung-Geel Yu
|
Byung-Geel Yu and Kook-Jin Kong
|
Reggeized model for $\gamma p \to \rho^- \Delta^{++}(1232)$
photoproduction
|
8 pages, 7 figures, 1 table
|
J. Phys. G47: 055106 (2020)
|
10.1088/1361-6471/ab3d10
| null |
hep-ph nucl-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
A model for the reaction $\gamma p\to\rho^-\Delta^{++}$ is presented with the
$t$-channel $\pi+\rho$ exchanges reggeized to describe the reaction up to high
energies. Gauge invariance of $\rho$ exchange is discussed in connection with
the convergence of the reaction cross section at high energy. The roles of
electromagnetic (EM) multipole moments of $\Delta^{++}$ baryon and of $\rho^-$
meson are analyzed in total and differential cross sections and spin density
matrix elements. Photon polarization asymmetry $\Sigma$ is predicted for a
measurement of electromagnetic moments of $\rho^-$ and of $\Delta^{++}$.
|
[
{
"created": "Tue, 6 Dec 2016 23:31:10 GMT",
"version": "v1"
},
{
"created": "Sun, 16 Jun 2019 15:25:07 GMT",
"version": "v2"
},
{
"created": "Wed, 28 Aug 2019 07:34:31 GMT",
"version": "v3"
}
] |
2020-07-01
|
[
[
"Yu",
"Byung-Geel",
""
],
[
"Kong",
"Kook-Jin",
""
]
] |
A model for the reaction $\gamma p\to\rho^-\Delta^{++}$ is presented with the $t$-channel $\pi+\rho$ exchanges reggeized to describe the reaction up to high energies. Gauge invariance of $\rho$ exchange is discussed in connection with the convergence of the reaction cross section at high energy. The roles of electromagnetic (EM) multipole moments of $\Delta^{++}$ baryon and of $\rho^-$ meson are analyzed in total and differential cross sections and spin density matrix elements. Photon polarization asymmetry $\Sigma$ is predicted for a measurement of electromagnetic moments of $\rho^-$ and of $\Delta^{++}$.
|
hep-th/9809029
|
Ruth A. W. Gregory
|
Filipe Bonjour and Ruth Gregory
|
Comment on ``Absence of abelian Higgs hair for extremal black holes''
|
1 page 2 figures, revised title
|
Phys.Rev.Lett. 81 (1998) 5034
|
10.1103/PhysRevLett.81.5034
|
DTP/98/63
|
hep-th gr-qc
| null |
We examine the claim of Chamblin et. al. that extreme black holes cannot
support abelian Higgs hair. We provide evidence that contradicts this claim and
discuss reasons for this discrepancy.
|
[
{
"created": "Fri, 4 Sep 1998 08:50:55 GMT",
"version": "v1"
},
{
"created": "Wed, 28 Oct 1998 15:08:43 GMT",
"version": "v2"
}
] |
2009-10-31
|
[
[
"Bonjour",
"Filipe",
""
],
[
"Gregory",
"Ruth",
""
]
] |
We examine the claim of Chamblin et. al. that extreme black holes cannot support abelian Higgs hair. We provide evidence that contradicts this claim and discuss reasons for this discrepancy.
|
1309.2847
|
Jun Zhang
|
Jaume Garriga, Alexander Vilenkin, Jun Zhang
|
Non-singular bounce transitions in the multiverse
|
29 pages, 11 figures, references added
| null |
10.1088/1475-7516/2013/11/055
| null |
hep-th gr-qc
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
According to classical GR, negative-energy (AdS) bubbles in the multiverse
terminate in big crunch singularities. It has been conjectured, however, that
the fundamental theory may resolve these singularities and replace them by
non-singular bounces. Here we explore possible dynamics of such bounces using a
simple modification of the Friedmann equation, which ensures that the scale
factor bounces when the matter density reaches some critical value $\rho_c$.
This is combined with a simple scalar field `landscape', where the energy
barriers between different vacua are small compared to $\rho_c$. We find that
the bounce typically results in a transition to another vacuum, with a scalar
field displacement $\Delta\phi \sim 1$ in Planck units. If the new vacuum is
AdS, we have another bounce, and so on, until the field finally transits to a
positive-energy (de Sitter) vacuum. We also consider perturbations about the
homogeneous solution and discuss some of their amplification mechanisms (e.g.,
tachyonic instability and parametric resonance). For a generic potential, these
mechanisms are much less efficient than in models of slow-roll inflation. But
the amplification may still be strong enough to cause the bubble to fragment
into a mosaic of different vacua.
|
[
{
"created": "Wed, 11 Sep 2013 14:54:40 GMT",
"version": "v1"
},
{
"created": "Tue, 24 Sep 2013 01:32:42 GMT",
"version": "v2"
}
] |
2015-06-17
|
[
[
"Garriga",
"Jaume",
""
],
[
"Vilenkin",
"Alexander",
""
],
[
"Zhang",
"Jun",
""
]
] |
According to classical GR, negative-energy (AdS) bubbles in the multiverse terminate in big crunch singularities. It has been conjectured, however, that the fundamental theory may resolve these singularities and replace them by non-singular bounces. Here we explore possible dynamics of such bounces using a simple modification of the Friedmann equation, which ensures that the scale factor bounces when the matter density reaches some critical value $\rho_c$. This is combined with a simple scalar field `landscape', where the energy barriers between different vacua are small compared to $\rho_c$. We find that the bounce typically results in a transition to another vacuum, with a scalar field displacement $\Delta\phi \sim 1$ in Planck units. If the new vacuum is AdS, we have another bounce, and so on, until the field finally transits to a positive-energy (de Sitter) vacuum. We also consider perturbations about the homogeneous solution and discuss some of their amplification mechanisms (e.g., tachyonic instability and parametric resonance). For a generic potential, these mechanisms are much less efficient than in models of slow-roll inflation. But the amplification may still be strong enough to cause the bubble to fragment into a mosaic of different vacua.
|
2101.00100
|
Aiden Sheckler
|
Aiden B. Sheckler and Gerald A. Miller
|
The Mystery of Bloom-Gilman Duality: A Light Front Holographic QCD
Perspective
| null |
Phys. Rev. D 103, 096018 (2021)
|
10.1103/PhysRevD.103.096018
| null |
hep-ph nucl-ex nucl-th
|
http://creativecommons.org/licenses/by/4.0/
|
Light front wave functions motivated by holographic constructions are used to
study Bloom-Gilman duality of deep inelastic scattering. Separate expressions
for structure functions in terms of quark and hadronic degrees of freedom are
presented, with a goal of relating the two expressions. A two-parton model is
defined and resonance transition form factors are computed using previously
derived light front wave functions. A new form of global duality is derived
from the valence quark-number sum rule. Using a complete set of hadronic states
is necessary for this new global duality to be achieved. Previous original work
does not provide such a set. This is remedied by amending the model to include
a longitudinal confining potential, and the resulting complete set is
sufficient to carry out the study of Bloom-Gilman duality. Expressions for
transition form factors are obtained and all are shown to fall asymptotically
as 1/Q2. The Feynman mechanism dominates the asymptotic behavior of the model.
These transition form factors are used to assess the validity of the global and
local duality sum rules, with the result that both neither are satisfied.
Evaluations of the hadronic expression for q(x,Q2) provide more details about
this lack. This result shows that the observed validity of both global and
local forms of duality for deep inelastic scattering must be related to a
feature of QCD that is deeper than completeness. Our simple present model
suggests a prediction that Bloom-Gilman duality would not be observed if deep
inelastic scattering experiments were to be made on the pion. The underlying
origin of the duality phenomenon in deep inelastic scattering is deeply buried
within the confinement aspects of QCD, and remains a mystery.
|
[
{
"created": "Thu, 31 Dec 2020 22:37:20 GMT",
"version": "v1"
}
] |
2021-05-26
|
[
[
"Sheckler",
"Aiden B.",
""
],
[
"Miller",
"Gerald A.",
""
]
] |
Light front wave functions motivated by holographic constructions are used to study Bloom-Gilman duality of deep inelastic scattering. Separate expressions for structure functions in terms of quark and hadronic degrees of freedom are presented, with a goal of relating the two expressions. A two-parton model is defined and resonance transition form factors are computed using previously derived light front wave functions. A new form of global duality is derived from the valence quark-number sum rule. Using a complete set of hadronic states is necessary for this new global duality to be achieved. Previous original work does not provide such a set. This is remedied by amending the model to include a longitudinal confining potential, and the resulting complete set is sufficient to carry out the study of Bloom-Gilman duality. Expressions for transition form factors are obtained and all are shown to fall asymptotically as 1/Q2. The Feynman mechanism dominates the asymptotic behavior of the model. These transition form factors are used to assess the validity of the global and local duality sum rules, with the result that both neither are satisfied. Evaluations of the hadronic expression for q(x,Q2) provide more details about this lack. This result shows that the observed validity of both global and local forms of duality for deep inelastic scattering must be related to a feature of QCD that is deeper than completeness. Our simple present model suggests a prediction that Bloom-Gilman duality would not be observed if deep inelastic scattering experiments were to be made on the pion. The underlying origin of the duality phenomenon in deep inelastic scattering is deeply buried within the confinement aspects of QCD, and remains a mystery.
|
1812.06258
|
Mitsuhiro Nishida
|
Hiroyuki Fujita, Mitsuhiro Nishida, Masahiro Nozaki, Yuji Sugimoto
|
Dynamics of logarithmic negativity and mutual information in smooth
quenches
|
33 pages, 8 figures. v2: comments and references added
|
Prog Theor Exp Phys (2020)
|
10.1093/ptep/ptaa078
|
OCU-PHYS 492, USTC-ICTS-18-22
|
hep-th cond-mat.stat-mech quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper, we study how quantum correlation between subsystems changes in
time by investigating time evolution of mutual information and logarithmic
negativity in two protocols of mass quench. Hamiltonian in both protocols is
for 2-dimensional free scalar theory with time-dependent mass: the mass in one
case decreases monotonically and vanishes asymptotically (ECP), and that in the
other decreases monotonically before t = 0, but increases monotonically
afterward, and becomes constant asymptotically (CCP). We study the time
evolution of the quantum correlations under those protocols in two different
limits of the mass quench; fast limit and slow limit depending on the speed
with which the mass is changed. We obtain the following two results: (1) For
the ECP, we find that the time evolution of logarithmic negativity is, when the
distance between the two subsystems is large enough, well-interpreted in terms
of the propagation of relativistic particles created at a time determined by
the limit of the quench we take. On the other hand, the evolution of mutual
information in the ECP depends not only on the relativistic particles but also
on slowly-moving particles. (2) For the CCP, both logarithmic negativity and
mutual information oscillate in time after the quench. When the subsystems are
well-separated, the oscillation of the quantum correlations in the fast limit
is suppressed, and the time evolution looks similar to that under the ECP in
the fast limit.
|
[
{
"created": "Sat, 15 Dec 2018 09:03:52 GMT",
"version": "v1"
},
{
"created": "Thu, 27 Dec 2018 10:43:01 GMT",
"version": "v2"
}
] |
2020-07-08
|
[
[
"Fujita",
"Hiroyuki",
""
],
[
"Nishida",
"Mitsuhiro",
""
],
[
"Nozaki",
"Masahiro",
""
],
[
"Sugimoto",
"Yuji",
""
]
] |
In this paper, we study how quantum correlation between subsystems changes in time by investigating time evolution of mutual information and logarithmic negativity in two protocols of mass quench. Hamiltonian in both protocols is for 2-dimensional free scalar theory with time-dependent mass: the mass in one case decreases monotonically and vanishes asymptotically (ECP), and that in the other decreases monotonically before t = 0, but increases monotonically afterward, and becomes constant asymptotically (CCP). We study the time evolution of the quantum correlations under those protocols in two different limits of the mass quench; fast limit and slow limit depending on the speed with which the mass is changed. We obtain the following two results: (1) For the ECP, we find that the time evolution of logarithmic negativity is, when the distance between the two subsystems is large enough, well-interpreted in terms of the propagation of relativistic particles created at a time determined by the limit of the quench we take. On the other hand, the evolution of mutual information in the ECP depends not only on the relativistic particles but also on slowly-moving particles. (2) For the CCP, both logarithmic negativity and mutual information oscillate in time after the quench. When the subsystems are well-separated, the oscillation of the quantum correlations in the fast limit is suppressed, and the time evolution looks similar to that under the ECP in the fast limit.
|
hep-ph/9502286
| null |
Giulia Ricciardi
|
Short and Long Distance Interplay in Inclusive $ B \to X_d \gamma $
Decays
|
content and results UNCHANGED: only shortened, to fit Phys. Lett. B
standards; 9 pages, latex
|
Phys.Lett.B355:313-317,1995
|
10.1016/0370-2693(95)00733-2
|
HUTP-94/A037, DSF-T-95/2
|
hep-ph
| null |
We analyze the short and long distance contributions to inclusive $B
\rightarrow X_d \gamma$ decay, paying particular attention to the dependence on
the Cabibbo-Kobayashi-Maskawa parameter $V_{td}$. We discuss penguin diagrams
with internal $u$ and $c$ quarks in the framework of the effective field
theory. We also estimate the size of possible long range contributions by using
vector meson dominance.
|
[
{
"created": "Mon, 13 Feb 1995 16:24:48 GMT",
"version": "v1"
},
{
"created": "Thu, 29 Jun 1995 10:52:58 GMT",
"version": "v2"
}
] |
2010-11-01
|
[
[
"Ricciardi",
"Giulia",
""
]
] |
We analyze the short and long distance contributions to inclusive $B \rightarrow X_d \gamma$ decay, paying particular attention to the dependence on the Cabibbo-Kobayashi-Maskawa parameter $V_{td}$. We discuss penguin diagrams with internal $u$ and $c$ quarks in the framework of the effective field theory. We also estimate the size of possible long range contributions by using vector meson dominance.
|
hep-th/0409284
|
John McGreevy
|
Albion Lawrence and John McGreevy
|
D-terms and D-strings in open string models
|
29 pages, 5 figures; v2: improved referencing
|
JHEP0410:056,2004
|
10.1088/1126-6708/2004/10/056
|
BRX TH-538, PUTP-2131, SU ITP-4/37
|
hep-th
| null |
We study the Fayet-Iliopoulos (FI) D-terms on D-branes in type II Calabi-Yau
backgrounds. We provide a simple worldsheet proof of the fact that, at tree
level, these terms only couple to scalars in closed string hypermultiplets. At
the one-loop level, the D-terms get corrections only if the gauge group has an
anomalous spectrum, with the anomaly cancelled by a Green-Schwarz mechanism. We
study the local type IIA model of D6-branes at SU(3) angles and show that, as
in field theory, the one-loop correction suffers from a quadratic divergence in
the open string channel. By studying the closed string channel, we show that
this divergence is related to a closed string tadpole, and is cancelled when
the tadpole is cancelled. Next, we study the cosmic strings that arise in the
supersymmetric phases of these systems in light of recent work of Dvali et. al.
In the type IIA intersecting D6-brane examples, we identify the D-term strings
as D4-branes ending on the D6-branes. Finally, we use N=1 dualities to relate
these results to previous work on the FI D-term of heterotic strings.
|
[
{
"created": "Tue, 28 Sep 2004 18:21:06 GMT",
"version": "v1"
},
{
"created": "Fri, 15 Oct 2004 22:44:39 GMT",
"version": "v2"
}
] |
2008-11-26
|
[
[
"Lawrence",
"Albion",
""
],
[
"McGreevy",
"John",
""
]
] |
We study the Fayet-Iliopoulos (FI) D-terms on D-branes in type II Calabi-Yau backgrounds. We provide a simple worldsheet proof of the fact that, at tree level, these terms only couple to scalars in closed string hypermultiplets. At the one-loop level, the D-terms get corrections only if the gauge group has an anomalous spectrum, with the anomaly cancelled by a Green-Schwarz mechanism. We study the local type IIA model of D6-branes at SU(3) angles and show that, as in field theory, the one-loop correction suffers from a quadratic divergence in the open string channel. By studying the closed string channel, we show that this divergence is related to a closed string tadpole, and is cancelled when the tadpole is cancelled. Next, we study the cosmic strings that arise in the supersymmetric phases of these systems in light of recent work of Dvali et. al. In the type IIA intersecting D6-brane examples, we identify the D-term strings as D4-branes ending on the D6-branes. Finally, we use N=1 dualities to relate these results to previous work on the FI D-term of heterotic strings.
|
hep-th/0207065
|
Soumitra SenGupta
|
Soumitra SenGupta, Saurabh Sur
|
Does curvature-dilaton coupling with Kalb Ramond field lead to an
accelerating Universe ?
|
10 pages, latex, 3 figures, version thoroughly revised
|
JCAP 0312:001,2003
|
10.1088/1475-7516/2003/12/001
| null |
hep-th
| null |
In this work we show that the Universe evolving in a spacetime with torsion
(originated from a second rank antisymmetric Kalb-Ramond field) and dilaton is
free from any big bang singularity and can have acceleration during the
evolution. Both the matter and radiation dominated era have been considered and
the role of the dilaton to explain the decelerating phase in the earlier epoch
has also been discussed.
|
[
{
"created": "Mon, 8 Jul 2002 10:21:54 GMT",
"version": "v1"
},
{
"created": "Wed, 24 Jul 2002 12:48:47 GMT",
"version": "v2"
},
{
"created": "Tue, 2 Dec 2003 11:46:23 GMT",
"version": "v3"
}
] |
2014-11-18
|
[
[
"SenGupta",
"Soumitra",
""
],
[
"Sur",
"Saurabh",
""
]
] |
In this work we show that the Universe evolving in a spacetime with torsion (originated from a second rank antisymmetric Kalb-Ramond field) and dilaton is free from any big bang singularity and can have acceleration during the evolution. Both the matter and radiation dominated era have been considered and the role of the dilaton to explain the decelerating phase in the earlier epoch has also been discussed.
|
2302.08281
|
Wrishik Naskar
|
Anisha, Oliver Atkinson, Akanksha Bhardwaj, Christoph Englert, Wrishik
Naskar, Panagiotis Stylianou
|
On the BSM reach of four top production at the LHC
|
21 pages, 9 figures
| null |
10.1103/PhysRevD.108.035001
|
DESY-23-025
|
hep-ph hep-ex
|
http://creativecommons.org/licenses/by/4.0/
|
Many scenarios of beyond the Standard Model (BSM) physics give rise to new
top-philic interactions that can be probed at proton machines such as the Large
Hadron Collider through a variety of production and decay modes. On the one
hand, this will enable a detailed determination of the BSM model's parameters
when a discovery is made and additional sensitivity in non-dominant production
modes can be achieved. On the other hand, the naive narrow width approximation
in dominant production modes such as gluon fusion might be inadequate for some
BSM parameter regions due to interference effects, effectively making less
dominant production modes more relevant in such instances. In this work, we
consider both these questions in the context of four top quark final states at
the LHC. Firstly, we show that the SM potential can be enhanced through the
application of targeted Graph Neural Network techniques that exploit data
correlations beyond cut-and-count approaches. Secondly, we show that
destructive interference effects that can degrade BSM sensitivity of top-philic
states from gluon fusion are largely avoided by turning to four top final
states. This achieves considerable exclusion potential for, e.g., the two Higgs
doublet model. This further motivates four top final states as sensitive tools
for BSM discovery in the near future of the LHC.
|
[
{
"created": "Thu, 16 Feb 2023 13:23:01 GMT",
"version": "v1"
}
] |
2023-08-16
|
[
[
"Anisha",
"",
""
],
[
"Atkinson",
"Oliver",
""
],
[
"Bhardwaj",
"Akanksha",
""
],
[
"Englert",
"Christoph",
""
],
[
"Naskar",
"Wrishik",
""
],
[
"Stylianou",
"Panagiotis",
""
]
] |
Many scenarios of beyond the Standard Model (BSM) physics give rise to new top-philic interactions that can be probed at proton machines such as the Large Hadron Collider through a variety of production and decay modes. On the one hand, this will enable a detailed determination of the BSM model's parameters when a discovery is made and additional sensitivity in non-dominant production modes can be achieved. On the other hand, the naive narrow width approximation in dominant production modes such as gluon fusion might be inadequate for some BSM parameter regions due to interference effects, effectively making less dominant production modes more relevant in such instances. In this work, we consider both these questions in the context of four top quark final states at the LHC. Firstly, we show that the SM potential can be enhanced through the application of targeted Graph Neural Network techniques that exploit data correlations beyond cut-and-count approaches. Secondly, we show that destructive interference effects that can degrade BSM sensitivity of top-philic states from gluon fusion are largely avoided by turning to four top final states. This achieves considerable exclusion potential for, e.g., the two Higgs doublet model. This further motivates four top final states as sensitive tools for BSM discovery in the near future of the LHC.
|
hep-th/0403124
|
Kluson Josef
|
J. Kluson
|
Proposal for the Open String Tachyon Effective Action in the Linear
Dilaton Background
|
18 pages
|
JHEP 0406 (2004) 021
|
10.1088/1126-6708/2004/06/021
| null |
hep-th
| null |
In this paper we propose tachyon effective actions for unstable D-branes in
superstring and bosonic string theories in the presence of the linear dilaton
background.
|
[
{
"created": "Thu, 11 Mar 2004 12:36:34 GMT",
"version": "v1"
}
] |
2009-11-10
|
[
[
"Kluson",
"J.",
""
]
] |
In this paper we propose tachyon effective actions for unstable D-branes in superstring and bosonic string theories in the presence of the linear dilaton background.
|
hep-th/9808041
|
Hugh Osborn
|
Hugh Osborn
|
N=1 Superconformal Symmetry in Four Dimensional Quantum Field Theory
|
53 pages, uses harvmac, revised version includes further corrections
and minor additions, version to be published
|
Annals Phys.272:243-294,1999
|
10.1006/aphy.1998.5893
|
DAMTP/98-101
|
hep-th
| null |
The implications of N=1 superconformal symmetry for four dimensional quantum
field theories are studied. Superconformal covariant expressions for two and
three point functions of quasi-primary superfields of arbitrary spin are found
and connected with the operator product expansion. The general formulae are
specialised to cases involving a scalar superfield L, which contains global
symmetry currents, and the supercurrent, which contains the energy momentum
tensor, and the consequences of superconformal Ward identities analysed. The
three point function of L is shown to have unique completely antisymmetric or
symmetric forms. In the latter case the superspace version of the axial anomaly
equation is obtained. The three point function for the supercurrent is shown to
have two linearly independent forms. A linear combination of the associated
coefficients for the general expression is shown to be related to the scale of
the supercurrent two point function through Ward identities. The coefficients
are given for the two free field superconformal theories and are also connected
with the parameters present in the supercurrent anomaly for supergravity
backgrounds. Superconformal invariants, which are possible even in three point
functions, are discussed.
|
[
{
"created": "Fri, 7 Aug 1998 14:04:43 GMT",
"version": "v1"
},
{
"created": "Sat, 8 Aug 1998 14:47:03 GMT",
"version": "v2"
},
{
"created": "Wed, 4 Nov 1998 16:44:49 GMT",
"version": "v3"
},
{
"created": "Tue, 19 Jan 1999 09:42:42 GMT",
"version": "v4"
}
] |
2009-02-23
|
[
[
"Osborn",
"Hugh",
""
]
] |
The implications of N=1 superconformal symmetry for four dimensional quantum field theories are studied. Superconformal covariant expressions for two and three point functions of quasi-primary superfields of arbitrary spin are found and connected with the operator product expansion. The general formulae are specialised to cases involving a scalar superfield L, which contains global symmetry currents, and the supercurrent, which contains the energy momentum tensor, and the consequences of superconformal Ward identities analysed. The three point function of L is shown to have unique completely antisymmetric or symmetric forms. In the latter case the superspace version of the axial anomaly equation is obtained. The three point function for the supercurrent is shown to have two linearly independent forms. A linear combination of the associated coefficients for the general expression is shown to be related to the scale of the supercurrent two point function through Ward identities. The coefficients are given for the two free field superconformal theories and are also connected with the parameters present in the supercurrent anomaly for supergravity backgrounds. Superconformal invariants, which are possible even in three point functions, are discussed.
|
hep-ph/0601018
|
Fei Wang
|
Fei Wang, Wenyu Wang, Jin Min Yang
|
Split Two-Higgs-Doublet Model and Neutrino Condensation
|
version in Europhys. Lett. (discussions added)
|
Europhys.Lett. 76 (2006) 388-394
|
10.1209/epl/i2006-10293-3
| null |
hep-ph astro-ph
| null |
We split the two-Higgs-doublet model by assuming very different vevs for the
two doublets: the vev is at weak scale (174 GeV) for the doublet \Phi_1 and at
neutrino-mass scale (10^{-2} \sim 10^{-3} eV) for the doublet \Phi_2. \Phi_1 is
responsible for giving masses to all fermions except neutrinos; while \Phi_2 is
responsible for giving neutrino masses through its tiny vev without introducing
see-saw mechanism. Among the predicted five physical scalars H, h, A^0 and
H^{\pm}, the CP-even scalar h is as light as 10^{-2} \sim 10^{-3}eV while
others are at weak scale. We identify h as the cosmic dark energy field and the
other CP-even scalar H as the Standard Model Higgs boson; while the CP-odd A^0
and the charged H^{\pm} are the exotic scalars to be discovered at future
colliders. Also we demonstrate a possible dynamical origin for the doublet
\Phi_2 from neutrino condensation caused by some unknown dynamics.
|
[
{
"created": "Tue, 3 Jan 2006 15:32:00 GMT",
"version": "v1"
},
{
"created": "Fri, 27 Jan 2006 09:35:55 GMT",
"version": "v2"
},
{
"created": "Wed, 25 Oct 2006 06:54:37 GMT",
"version": "v3"
}
] |
2009-11-11
|
[
[
"Wang",
"Fei",
""
],
[
"Wang",
"Wenyu",
""
],
[
"Yang",
"Jin Min",
""
]
] |
We split the two-Higgs-doublet model by assuming very different vevs for the two doublets: the vev is at weak scale (174 GeV) for the doublet \Phi_1 and at neutrino-mass scale (10^{-2} \sim 10^{-3} eV) for the doublet \Phi_2. \Phi_1 is responsible for giving masses to all fermions except neutrinos; while \Phi_2 is responsible for giving neutrino masses through its tiny vev without introducing see-saw mechanism. Among the predicted five physical scalars H, h, A^0 and H^{\pm}, the CP-even scalar h is as light as 10^{-2} \sim 10^{-3}eV while others are at weak scale. We identify h as the cosmic dark energy field and the other CP-even scalar H as the Standard Model Higgs boson; while the CP-odd A^0 and the charged H^{\pm} are the exotic scalars to be discovered at future colliders. Also we demonstrate a possible dynamical origin for the doublet \Phi_2 from neutrino condensation caused by some unknown dynamics.
|
0907.5107
|
Marco Sampaio
|
Marco O. P. Sampaio
|
Charge and mass effects on the evaporation of higher-dimensional
rotating black holes
|
Published version. Minor typos corrected. 29 pages, 5 figures
|
JHEP 0910:008,2009
|
10.1088/1126-6708/2009/10/008
| null |
hep-th hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
To study the dynamics of discharge of a brane black hole in TeV gravity
scenarios, we obtain the approximate electromagnetic field due to the charged
black hole, by solving Maxwell's equations perturbatively on the brane. In
addition, arguments are given for brane metric corrections due to backreaction.
We couple brane scalar and brane fermion fields with non-zero mass and charge
to the background, and study the Hawking radiation process using well known low
energy approximations as well as a WKB approximation in the high energy limit.
We argue that contrary to common claims, the initial evaporation is not
dominated by fast Schwinger discharge.
|
[
{
"created": "Wed, 29 Jul 2009 11:30:42 GMT",
"version": "v1"
},
{
"created": "Wed, 12 Aug 2009 11:18:19 GMT",
"version": "v2"
},
{
"created": "Tue, 6 Oct 2009 13:47:28 GMT",
"version": "v3"
}
] |
2011-08-02
|
[
[
"Sampaio",
"Marco O. P.",
""
]
] |
To study the dynamics of discharge of a brane black hole in TeV gravity scenarios, we obtain the approximate electromagnetic field due to the charged black hole, by solving Maxwell's equations perturbatively on the brane. In addition, arguments are given for brane metric corrections due to backreaction. We couple brane scalar and brane fermion fields with non-zero mass and charge to the background, and study the Hawking radiation process using well known low energy approximations as well as a WKB approximation in the high energy limit. We argue that contrary to common claims, the initial evaporation is not dominated by fast Schwinger discharge.
|
hep-ph/9805327
|
Wim Beenakker
|
W. Beenakker, F.A. Berends, A.P. Chapovsky (Leiden)
|
Final-state radiation and line-shape distortion in resonance pair
production
|
9 pages, LaTeX2e, 1 figure
|
Phys.Lett. B435 (1998) 233-239
|
10.1016/S0370-2693(98)00760-6
| null |
hep-ph
| null |
In this letter it is shown how final-state QED corrections to the production
of a pair of resonances can distort the line shape of such a resonance in a
sizeable way. This effect depends on the definition of the line shape and can
reach up to 30%, depending on the final state. The mechanism is first displayed
for a particular case of ZZ production, for which an exact and approximate
treatment can be given. The approximate method is then applied to W-pair
production. In addition some simple rules of thumb are given for accurately
estimating the characteristic distortion effects, like the mass shift and peak
reduction.
|
[
{
"created": "Thu, 14 May 1998 14:45:18 GMT",
"version": "v1"
}
] |
2009-10-31
|
[
[
"Beenakker",
"W.",
"",
"Leiden"
],
[
"Berends",
"F. A.",
"",
"Leiden"
],
[
"Chapovsky",
"A. P.",
"",
"Leiden"
]
] |
In this letter it is shown how final-state QED corrections to the production of a pair of resonances can distort the line shape of such a resonance in a sizeable way. This effect depends on the definition of the line shape and can reach up to 30%, depending on the final state. The mechanism is first displayed for a particular case of ZZ production, for which an exact and approximate treatment can be given. The approximate method is then applied to W-pair production. In addition some simple rules of thumb are given for accurately estimating the characteristic distortion effects, like the mass shift and peak reduction.
|
hep-th/0207099
|
Gabor Takacs
|
Z. Bajnok, L. Palla and G. Takacs
|
Spectrum of boundary states in N=1 SUSY sine-Gordon theory
|
25 pages, 7 eps figures. Reference added
|
Nucl.Phys. B644 (2002) 509-532
|
10.1016/S0550-3213(02)00821-0
|
ITP Budapest Report 583
|
hep-th
| null |
We consider N=1 supersymmetric sine-Gordon theory (SSG) with supersymmetric
integrable boundary conditions (boundary SSG = BSSG). We find two possible ways
to close the boundary bootstrap for this model, corresponding to two different
choices for the boundary supercharge. We argue that these two bootstrap
solutions should correspond to the two integrable Lagrangian boundary theories
considered recently by Nepomechie.
|
[
{
"created": "Thu, 11 Jul 2002 07:51:06 GMT",
"version": "v1"
},
{
"created": "Tue, 23 Jul 2002 10:47:12 GMT",
"version": "v2"
}
] |
2009-11-07
|
[
[
"Bajnok",
"Z.",
""
],
[
"Palla",
"L.",
""
],
[
"Takacs",
"G.",
""
]
] |
We consider N=1 supersymmetric sine-Gordon theory (SSG) with supersymmetric integrable boundary conditions (boundary SSG = BSSG). We find two possible ways to close the boundary bootstrap for this model, corresponding to two different choices for the boundary supercharge. We argue that these two bootstrap solutions should correspond to the two integrable Lagrangian boundary theories considered recently by Nepomechie.
|
hep-ph/0405002
|
Marek Karliner
|
Marek Karliner and Harry J. Lipkin
|
Why the Theta+ is seen in some experiments and not in others - a
possible explanation
|
An experimental reference added. 8 pages, LaTeX, no figures
|
Phys.Lett. B597 (2004) 309-313
|
10.1016/j.physletb.2004.07.027
|
Cavendish-HEP-04/15, TAUP 2769-4, WIS/11/04-May-DPP,
ANL-HEP-PR-04-45
|
hep-ph hep-ex
| null |
The contradiction between evidence for and against the existence of the
Theta+ pentaquark might be resolved if it only appears as a result of a
particular production mechanism which is present in some experiments and absent
in others. We examine the implications of Theta+ production via decay of a
cryptoexotic N* resonance with a mass of about 2.4 GeV corresponding to a peak
in the experimental data for the invariant mass of the (Theta+,K-) system.
Further experimental checks are suggested.
|
[
{
"created": "Mon, 3 May 2004 16:07:39 GMT",
"version": "v1"
},
{
"created": "Mon, 3 May 2004 22:33:59 GMT",
"version": "v2"
},
{
"created": "Mon, 10 May 2004 21:45:02 GMT",
"version": "v3"
},
{
"created": "Wed, 30 Jun 2004 12:31:08 GMT",
"version": "v4"
}
] |
2009-11-10
|
[
[
"Karliner",
"Marek",
""
],
[
"Lipkin",
"Harry J.",
""
]
] |
The contradiction between evidence for and against the existence of the Theta+ pentaquark might be resolved if it only appears as a result of a particular production mechanism which is present in some experiments and absent in others. We examine the implications of Theta+ production via decay of a cryptoexotic N* resonance with a mass of about 2.4 GeV corresponding to a peak in the experimental data for the invariant mass of the (Theta+,K-) system. Further experimental checks are suggested.
|
1109.0357
|
Seung-il Nam
|
Seung-il Nam, Chung-Wen Kao, Byung-Geel Yu
|
Unpolarized fragmentation function for the pion and kaon via the
nonlocal chiral-quark model
|
4 pages, 2 figures, Talk given at the international conference The
Fifth Asia-Pacific Conference on Few-Body Systems in Physics 2011 (APFB2011),
Seoul, Republic of Korea, 22-26 August 2011
| null |
10.1007/s00601-012-0347-9
|
KIAS-P11048, CYCU-HEP-11-15
|
hep-ph nucl-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this talk we present our recent studies for the unpolarized fragmentation
functions for the pion and kaon, employing the nonlocal chiral quark model,
which manifests the nonlocal interaction between the quarks and pseudoscalar
mesons, in the light-cone frame. It turns out that the nonlocal interaction
produces considerable differences in comparison to typical local-interaction
models.
|
[
{
"created": "Fri, 2 Sep 2011 04:51:27 GMT",
"version": "v1"
}
] |
2015-05-30
|
[
[
"Nam",
"Seung-il",
""
],
[
"Kao",
"Chung-Wen",
""
],
[
"Yu",
"Byung-Geel",
""
]
] |
In this talk we present our recent studies for the unpolarized fragmentation functions for the pion and kaon, employing the nonlocal chiral quark model, which manifests the nonlocal interaction between the quarks and pseudoscalar mesons, in the light-cone frame. It turns out that the nonlocal interaction produces considerable differences in comparison to typical local-interaction models.
|
hep-ph/0409154
|
Yutaka Hosotani
|
Yutaka Hosotani
|
Dynamical Gauge-Higgs Unification (SUSY04)
|
4 pages, 1 figure. Proceeding for "SUSY 2004"
| null | null |
OU-HET 479/2004
|
hep-ph
| null |
Dynamical gauge-Higgs unification is presented in higher dimensional gauge
theory, in which both adjoint and fundamental Higgs fields are a part of gauge
fields. Dynamical gauge symmetry breaking is induced through the Hosotani
mechanism. Gauge theory, including the U(3) x U(3) model, is examined on M^4 x
(T^2/Z_2).
|
[
{
"created": "Tue, 14 Sep 2004 12:59:26 GMT",
"version": "v1"
}
] |
2007-05-23
|
[
[
"Hosotani",
"Yutaka",
""
]
] |
Dynamical gauge-Higgs unification is presented in higher dimensional gauge theory, in which both adjoint and fundamental Higgs fields are a part of gauge fields. Dynamical gauge symmetry breaking is induced through the Hosotani mechanism. Gauge theory, including the U(3) x U(3) model, is examined on M^4 x (T^2/Z_2).
|
hep-th/0209109
|
Solange Odile Saliu
|
C. Bizdadea, E. M. Cioroianu, S. O. Saliu
|
Irreducible Freedman-Townsend vertex and Hamiltonian BRST cohomology
|
16 pages, 0 figures
|
Annalen Phys. 11 (2002) 151-161
|
10.1002/wea.6080570312
| null |
hep-th
| null |
The irreducible Freedman-Townsend vertex is derived by means of the
Hamiltonian deformation procedure based on local BRST cohomology.
|
[
{
"created": "Fri, 13 Sep 2002 08:30:36 GMT",
"version": "v1"
}
] |
2017-04-26
|
[
[
"Bizdadea",
"C.",
""
],
[
"Cioroianu",
"E. M.",
""
],
[
"Saliu",
"S. O.",
""
]
] |
The irreducible Freedman-Townsend vertex is derived by means of the Hamiltonian deformation procedure based on local BRST cohomology.
|
2307.01336
|
Fabio Dahia
|
F. Dahia and A.S.Lemos
|
The alpha particle charge radius, the radion and the proton radius
puzzle
| null | null | null | null |
hep-ph gr-qc physics.atom-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Recent measurements of the Lamb shift of muonic helium-4 ions were used to
infer the alpha particle charge radius. The value found is compatible with the
radius extracted from the analysis of the electron-helium scattering. Thus, the
new spectroscopic data put additional empiric bounds on some free parameters of
certain physics theories beyond the Standard Model. In this paper, we analyze
the new data in the context of large extra-dimensional theories. Specifically,
we calculate the influence of the radion, the scalar degree of freedom of the
higher-dimensional gravity, on the energy difference between the 2S and 2P
levels of this exotic atom. The radion field is related to fluctuations of the
volume of the supplementary space, and, in comparison with the tensorial
degrees of freedom, it couples to matter in a different way. Moreover, as some
stabilization mechanism acts exclusively on the scalar degree of freedom, the
tensor and scalar fields should be treated as phenomenologically independent
quantities. Based on the spectroscopic data of muonic helium, we find
constraints for the effective energy scale of the radion as a function of the
alpha particle radius. Then, we discuss the implications of these new
constraints on the proton radius puzzle.
|
[
{
"created": "Mon, 3 Jul 2023 20:14:39 GMT",
"version": "v1"
}
] |
2023-07-06
|
[
[
"Dahia",
"F.",
""
],
[
"Lemos",
"A. S.",
""
]
] |
Recent measurements of the Lamb shift of muonic helium-4 ions were used to infer the alpha particle charge radius. The value found is compatible with the radius extracted from the analysis of the electron-helium scattering. Thus, the new spectroscopic data put additional empiric bounds on some free parameters of certain physics theories beyond the Standard Model. In this paper, we analyze the new data in the context of large extra-dimensional theories. Specifically, we calculate the influence of the radion, the scalar degree of freedom of the higher-dimensional gravity, on the energy difference between the 2S and 2P levels of this exotic atom. The radion field is related to fluctuations of the volume of the supplementary space, and, in comparison with the tensorial degrees of freedom, it couples to matter in a different way. Moreover, as some stabilization mechanism acts exclusively on the scalar degree of freedom, the tensor and scalar fields should be treated as phenomenologically independent quantities. Based on the spectroscopic data of muonic helium, we find constraints for the effective energy scale of the radion as a function of the alpha particle radius. Then, we discuss the implications of these new constraints on the proton radius puzzle.
|
2302.08847
|
Girish Kumar
|
Wei-Shu Hou, Girish Kumar and Tanmoy Modak
|
Probing Baryogenesis with Radiative Beauty Decay and Electron EDM
|
5 pages, 3 captioned figures, 1 table, v3: added results for
inclusive CPV difference $\Delta A_{CP}$
| null | null | null |
hep-ph hep-ex
|
http://creativecommons.org/licenses/by/4.0/
|
With the Large Hadron Collider (LHC) running, we should probe electroweak
baryogenesis (EWBG) while probing $CP$ violation (CPV) with electron electric
dipole moment (eEDM). Rooted in the flavor structure of the Standard Model
(SM), the general two Higgs doublet model (g2HDM) with a second set of Yukawa
couplings can deliver EWBG while surviving eEDM. We point out a chiral-enhanced
top-bottom interference effect that makes $b \to s\gamma$ decay an exquisite
window on EWBG and eEDM, and illustrate the importance of the $\Delta A_{CP}$
observable at Belle II.
|
[
{
"created": "Fri, 17 Feb 2023 12:42:36 GMT",
"version": "v1"
},
{
"created": "Sun, 5 Mar 2023 14:31:32 GMT",
"version": "v2"
},
{
"created": "Sat, 26 Aug 2023 06:46:45 GMT",
"version": "v3"
}
] |
2023-08-29
|
[
[
"Hou",
"Wei-Shu",
""
],
[
"Kumar",
"Girish",
""
],
[
"Modak",
"Tanmoy",
""
]
] |
With the Large Hadron Collider (LHC) running, we should probe electroweak baryogenesis (EWBG) while probing $CP$ violation (CPV) with electron electric dipole moment (eEDM). Rooted in the flavor structure of the Standard Model (SM), the general two Higgs doublet model (g2HDM) with a second set of Yukawa couplings can deliver EWBG while surviving eEDM. We point out a chiral-enhanced top-bottom interference effect that makes $b \to s\gamma$ decay an exquisite window on EWBG and eEDM, and illustrate the importance of the $\Delta A_{CP}$ observable at Belle II.
|
2209.08118
|
Alexei Yung
|
A. Yung
|
NS Three-form Flux Deformation for the Critical Non-Abelian Vortex
String
|
35 pages, no figures. arXiv admin note: substantial text overlap with
arXiv:2105.02645
| null |
10.1103/PhysRevD.106.106019
| null |
hep-th
|
http://creativecommons.org/licenses/by/4.0/
|
It has been shown that non-Abelian solitonic vortex string supported in
four-dimensional (4D) N = 2 supersymmetric QCD (SQCD) with the U(2) gauge group
and $N_f = 4$ quark flavors becomes a critical superstring. This string
propagates in the ten-dimensional space formed by a product of the flat 4D
space and an internal space given by a Calabi-Yau noncompact threefold, namely,
the conifold. The spectrum of low lying closed string states in the associated
type IIA string theory was found and interpreted as a spectrum of hadrons in 4D
N = 2 SQCD. In particular, the lowest string state appears to be a massless BPS
baryon associated with the deformation of the complex structure modulus $b$ of
the conifold. In the previous work the deformation of the 10-dimensional
background with nonzero Neveu-Schwarz 3-form flux was considered and
interpreted as a switching on a particular choice of quark masses in 4D SQCD.
This deformation was studied to the leading order at small 3-form flux. In this
paper we study the back reaction of the nonzero 3-form flux on the metric and
the dilaton introducing ansatz with several warp factors and solving gravity
equations of motion. We show that 3-form flux produces a potential for the
conifold complex structure modulus $b$, which leads to the runaway vacuum. At
the runaway vacuum warp factors disappear, while the conifold degenerates. In
4D SQCD we relate this to the flow to the U(1) gauge theory upon switching on
quark masses and decoupling of two flavors.
|
[
{
"created": "Fri, 16 Sep 2022 18:11:07 GMT",
"version": "v1"
}
] |
2022-12-07
|
[
[
"Yung",
"A.",
""
]
] |
It has been shown that non-Abelian solitonic vortex string supported in four-dimensional (4D) N = 2 supersymmetric QCD (SQCD) with the U(2) gauge group and $N_f = 4$ quark flavors becomes a critical superstring. This string propagates in the ten-dimensional space formed by a product of the flat 4D space and an internal space given by a Calabi-Yau noncompact threefold, namely, the conifold. The spectrum of low lying closed string states in the associated type IIA string theory was found and interpreted as a spectrum of hadrons in 4D N = 2 SQCD. In particular, the lowest string state appears to be a massless BPS baryon associated with the deformation of the complex structure modulus $b$ of the conifold. In the previous work the deformation of the 10-dimensional background with nonzero Neveu-Schwarz 3-form flux was considered and interpreted as a switching on a particular choice of quark masses in 4D SQCD. This deformation was studied to the leading order at small 3-form flux. In this paper we study the back reaction of the nonzero 3-form flux on the metric and the dilaton introducing ansatz with several warp factors and solving gravity equations of motion. We show that 3-form flux produces a potential for the conifold complex structure modulus $b$, which leads to the runaway vacuum. At the runaway vacuum warp factors disappear, while the conifold degenerates. In 4D SQCD we relate this to the flow to the U(1) gauge theory upon switching on quark masses and decoupling of two flavors.
|
1602.02766
|
Ignacio Izaguirre
|
Sovan Chakraborty, Rasmus Sloth Hansen, Ignacio Izaguirre, Georg
Raffelt
|
Collective neutrino flavor conversion: Recent developments
|
16 pages, 3 figures
| null |
10.1016/j.nuclphysb.2016.02.012
| null |
hep-ph astro-ph.SR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Neutrino flavor evolution in core-collapse supernovae, neutron-star mergers,
or the early universe is dominated by neutrino-neutrino refraction, often
spawning "self-induced flavor conversion", i.e., shuffling of flavor among
momentum modes. This effect is driven by collective run-away modes of the
coupled "flavor oscillators" and can spontaneously break the initial symmetries
such as axial symmetry, homogeneity, isotropy, and even stationarity. Moreover,
the growth rates of unstable modes can be of the order of the neutrino-neutrino
interaction energy instead of the much smaller vacuum oscillation frequency:
self-induced flavor conversion does not always require neutrino masses. We
illustrate these newly found phenomena in terms of simple toy models. What
happens in realistic astrophysical settings is up to speculation at present.
|
[
{
"created": "Mon, 8 Feb 2016 21:00:07 GMT",
"version": "v1"
}
] |
2016-06-22
|
[
[
"Chakraborty",
"Sovan",
""
],
[
"Hansen",
"Rasmus Sloth",
""
],
[
"Izaguirre",
"Ignacio",
""
],
[
"Raffelt",
"Georg",
""
]
] |
Neutrino flavor evolution in core-collapse supernovae, neutron-star mergers, or the early universe is dominated by neutrino-neutrino refraction, often spawning "self-induced flavor conversion", i.e., shuffling of flavor among momentum modes. This effect is driven by collective run-away modes of the coupled "flavor oscillators" and can spontaneously break the initial symmetries such as axial symmetry, homogeneity, isotropy, and even stationarity. Moreover, the growth rates of unstable modes can be of the order of the neutrino-neutrino interaction energy instead of the much smaller vacuum oscillation frequency: self-induced flavor conversion does not always require neutrino masses. We illustrate these newly found phenomena in terms of simple toy models. What happens in realistic astrophysical settings is up to speculation at present.
|
hep-ph/0510031
|
Oleg Teryaev
|
O.V. Teryaev
|
Analytic Properties of Hard Exclusive Amplitudes
|
4 pages, contribution to XIth International Conference on Elastic and
Diffractive Scattering, Chateau de Blois, France, May 15 - 20, 2005
| null | null | null |
hep-ph
| null |
Analytic properties of hard exclusive processes described by Generalized
Parton Distributions (GPD's) are considered. The analytic continuation of GPD
is provided by Generalized Distribution Amplitudes (GDA). The GDA's for the
production of two $\rho-$mesons may give an access to four-quark exotic states.
The crucial role in the proof of analyticity is played by the Cavalieri
conditions (polynomiality), resulting in the "holographic" property of GPD,
when the full information about various hard processes is contained in the one
dimensional sections ($x=\pm \xi$)of GPD. The applicability of analyticity for
description of the double diffractive production of dileptons and Higgs bosons
is discussed.
|
[
{
"created": "Mon, 3 Oct 2005 17:45:41 GMT",
"version": "v1"
},
{
"created": "Mon, 10 Oct 2005 15:50:35 GMT",
"version": "v2"
}
] |
2007-05-23
|
[
[
"Teryaev",
"O. V.",
""
]
] |
Analytic properties of hard exclusive processes described by Generalized Parton Distributions (GPD's) are considered. The analytic continuation of GPD is provided by Generalized Distribution Amplitudes (GDA). The GDA's for the production of two $\rho-$mesons may give an access to four-quark exotic states. The crucial role in the proof of analyticity is played by the Cavalieri conditions (polynomiality), resulting in the "holographic" property of GPD, when the full information about various hard processes is contained in the one dimensional sections ($x=\pm \xi$)of GPD. The applicability of analyticity for description of the double diffractive production of dileptons and Higgs bosons is discussed.
|
hep-ph/0304148
|
Giulia Zanderighi
|
A. Banfi, G. P. Salam, G. Zanderighi
|
Generalized resummation of QCD final-state observables
|
9 pages, 1 figure; v2 includes substantial amplifications and
clarifications
|
Phys.Lett. B584 (2004) 298-305
|
10.1016/j.physletb.2004.01.048
|
Bicocca-FT-03-8, DCPT-03-36, IPPP-03-18, LPTHE-03-12,
NIKHEF/2003-007
|
hep-ph
| null |
The resummation of logarithmically-enhanced terms to all perturbative orders
is a prerequisite for many studies of QCD final-states. Until now such
resummations have always been performed by hand, for a single observable at a
time. In this letter we present a general `master' resummation formula (and
applicability conditions), suitable for a large class of observables. This
makes it possible for next-to-leading logarithmic resummations to be carried
out automatically given only a computer routine for the observable. To
illustrate the method we present the first next-to-leading logarithmic resummed
prediction for an event shape in hadronic dijet production.
|
[
{
"created": "Tue, 15 Apr 2003 18:27:28 GMT",
"version": "v1"
},
{
"created": "Thu, 22 Jan 2004 11:05:16 GMT",
"version": "v2"
}
] |
2009-11-10
|
[
[
"Banfi",
"A.",
""
],
[
"Salam",
"G. P.",
""
],
[
"Zanderighi",
"G.",
""
]
] |
The resummation of logarithmically-enhanced terms to all perturbative orders is a prerequisite for many studies of QCD final-states. Until now such resummations have always been performed by hand, for a single observable at a time. In this letter we present a general `master' resummation formula (and applicability conditions), suitable for a large class of observables. This makes it possible for next-to-leading logarithmic resummations to be carried out automatically given only a computer routine for the observable. To illustrate the method we present the first next-to-leading logarithmic resummed prediction for an event shape in hadronic dijet production.
|
1802.02955
|
Fedor Popov
|
Emil T. Akhmedov, Ugo Moschella, Fedor K. Popov
|
Ultraviolet phenomena in AdS self-interacting quantum field theory
|
19 pages, 4 figures
| null |
10.1007/JHEP03(2018)183
| null |
hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study the one-loop corrections to the four-point function in the Anti de
Sitter space-time for a $\phi^4$ field theory. Our calculation shows the
existence of non-local counterterms which however respect the AdS isometry. Our
arguments are quite general and applicable to other (non-conformal) AdS field
theories. We also explain why calculations in Euclidean and Lorentzian
signatures should differ even at the leading order in non globaly hyperbolic
manifolds.
|
[
{
"created": "Thu, 8 Feb 2018 16:40:11 GMT",
"version": "v1"
},
{
"created": "Mon, 19 Mar 2018 13:00:23 GMT",
"version": "v2"
}
] |
2020-05-20
|
[
[
"Akhmedov",
"Emil T.",
""
],
[
"Moschella",
"Ugo",
""
],
[
"Popov",
"Fedor K.",
""
]
] |
We study the one-loop corrections to the four-point function in the Anti de Sitter space-time for a $\phi^4$ field theory. Our calculation shows the existence of non-local counterterms which however respect the AdS isometry. Our arguments are quite general and applicable to other (non-conformal) AdS field theories. We also explain why calculations in Euclidean and Lorentzian signatures should differ even at the leading order in non globaly hyperbolic manifolds.
|
1710.02463
|
Nelia Mann
|
Ziyi Hu, Brian Maddock, Nelia Mann
|
A Second Look at String-Inspired Models for Proton-Proton Scattering via
Pomeron Exchange
|
16 pages, 7 figures, 2 tables
| null |
10.1007/JHEP08(2018)093
| null |
hep-ph hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We re-examine a string dual model for elastic proton-proton scattering via
Pomeron exchange. We argue that the method of "Reggeizing" a propagator to take
into account an entire trajectory of exchanged particles can be generalized, in
particular by modifying the value of the mass-shell parameter in the model. We
then fit the generalized model to scattering data at large s and small t. The
fitting results are inconclusive, but suggest that a better fit might be
obtained by allowing the mass-shell to vary. The model fits the data equally
well (roughly) for a wide range of values of the mass-shell parameter, but the
other fitting parameters (the slope and intercept of the Regge trajectory, and
the coupling constant and dipole mass from the proton-proton-glueball coupling)
are then inconsistent with what we expect. On the other hand, using the
traditional method of Reggeization generates a weaker fit, but the other
parameters obtain more physically reasonable values. In analyzing the fitting
results, we also found that our model is more consistent with the sqrt(s) =
1800 GeV coming from the E710 experiment than that coming from the CDF
experiment, and that our model has the greatest discrepancy with the data in
the range 0.5 GeV^2 < |t| < 0.6 GeV^2, suggesting that the transition from soft
Pomeron to hard Pomeron may occur closer to t = -0.5 GeV^2 rather than t = -0.6
GeV^2 as previously thought.
|
[
{
"created": "Fri, 6 Oct 2017 15:51:30 GMT",
"version": "v1"
}
] |
2018-09-26
|
[
[
"Hu",
"Ziyi",
""
],
[
"Maddock",
"Brian",
""
],
[
"Mann",
"Nelia",
""
]
] |
We re-examine a string dual model for elastic proton-proton scattering via Pomeron exchange. We argue that the method of "Reggeizing" a propagator to take into account an entire trajectory of exchanged particles can be generalized, in particular by modifying the value of the mass-shell parameter in the model. We then fit the generalized model to scattering data at large s and small t. The fitting results are inconclusive, but suggest that a better fit might be obtained by allowing the mass-shell to vary. The model fits the data equally well (roughly) for a wide range of values of the mass-shell parameter, but the other fitting parameters (the slope and intercept of the Regge trajectory, and the coupling constant and dipole mass from the proton-proton-glueball coupling) are then inconsistent with what we expect. On the other hand, using the traditional method of Reggeization generates a weaker fit, but the other parameters obtain more physically reasonable values. In analyzing the fitting results, we also found that our model is more consistent with the sqrt(s) = 1800 GeV coming from the E710 experiment than that coming from the CDF experiment, and that our model has the greatest discrepancy with the data in the range 0.5 GeV^2 < |t| < 0.6 GeV^2, suggesting that the transition from soft Pomeron to hard Pomeron may occur closer to t = -0.5 GeV^2 rather than t = -0.6 GeV^2 as previously thought.
|
hep-th/9307046
|
Eric Bergshoeff
|
E. Bergshoeff, H.J. Boonstra, S. Panda and M. de Roo
|
A BRST Analysis of $W$-symmetries
|
32 pages, UG-4/93
|
Nucl.Phys. B411 (1994) 717-744
|
10.1016/0550-3213(94)90468-5
| null |
hep-th
| null |
We perform a classical BRST analysis of the symmetries corresponding to a
generic $w_N$-algebra. An essential feature of our method is that we write the
$w_N$-algebra in a special basis such that the algebra manifestly has a
``nested'' set of subalgebras $v_N^N \subset v_N^{N-1} \subset \dots \subset
v_N^2 \equiv w_N$ where the subalgebra $v_N^i\ (i=2, \dots ,N)$ consists of
generators of spin $s=\{i,i+1,\dots ,N\}$, respectively. In the new basis the
BRST charge can be written as a ``nested'' sum of $N-1$ nilpotent BRST charges.
In view of potential applications to (critical and/or non-critical) $W$-string
theories we discuss the quantum extension of our results. In particular, we
present the quantum BRST-operator for the $W_4$-algebra in the new basis. For
both critical and non-critical $W$-strings we apply our results to discuss the
relation with minimal models.
|
[
{
"created": "Wed, 7 Jul 1993 08:38:55 GMT",
"version": "v1"
}
] |
2009-10-22
|
[
[
"Bergshoeff",
"E.",
""
],
[
"Boonstra",
"H. J.",
""
],
[
"Panda",
"S.",
""
],
[
"de Roo",
"M.",
""
]
] |
We perform a classical BRST analysis of the symmetries corresponding to a generic $w_N$-algebra. An essential feature of our method is that we write the $w_N$-algebra in a special basis such that the algebra manifestly has a ``nested'' set of subalgebras $v_N^N \subset v_N^{N-1} \subset \dots \subset v_N^2 \equiv w_N$ where the subalgebra $v_N^i\ (i=2, \dots ,N)$ consists of generators of spin $s=\{i,i+1,\dots ,N\}$, respectively. In the new basis the BRST charge can be written as a ``nested'' sum of $N-1$ nilpotent BRST charges. In view of potential applications to (critical and/or non-critical) $W$-string theories we discuss the quantum extension of our results. In particular, we present the quantum BRST-operator for the $W_4$-algebra in the new basis. For both critical and non-critical $W$-strings we apply our results to discuss the relation with minimal models.
|
2203.11976
|
Taegyun Kim
|
Taegyun Kim, Adam Martin
|
Monolepton production in SMEFT to $\mathcal O(1/\Lambda^4)$ and beyond
| null | null |
10.1007/JHEP09(2022)124
| null |
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We calculate $pp \to \ell^{+}\nu, \ell^-\bar \nu$ to ${\cal{O}}(1/\Lambda^4)$
within the Standard Model Effective Field Theory (SMEFT) framework. In
particular, we calculate the four-fermion contribution from dimension six and
eight operators, which dominates at large center of mass energy. We explore the
relative size of the $\mathcal O(1/\Lambda^4)$ and $\mathcal O(1/\Lambda^2)$
results for various kinematic regimes and assumptions about the Wilson
coefficients. Results for Drell-Yan production $pp \to \ell^+\ell^-$ at
${\cal{O}}(1/\Lambda^4)$ are also provided. Additionally, we develop the form
for four fermion contact term contributions to $pp \to \ell^{+}\nu, \ell^-\bar
\nu, pp \to \ell^+\ell^-$ of arbitrary mass dimension. This allows us to
estimate the effects from even higher dimensional (dimension $> 8$) terms in
the SMEFT framework.
|
[
{
"created": "Tue, 22 Mar 2022 18:14:19 GMT",
"version": "v1"
},
{
"created": "Thu, 24 Mar 2022 00:49:22 GMT",
"version": "v2"
},
{
"created": "Thu, 18 Aug 2022 00:08:34 GMT",
"version": "v3"
}
] |
2022-09-28
|
[
[
"Kim",
"Taegyun",
""
],
[
"Martin",
"Adam",
""
]
] |
We calculate $pp \to \ell^{+}\nu, \ell^-\bar \nu$ to ${\cal{O}}(1/\Lambda^4)$ within the Standard Model Effective Field Theory (SMEFT) framework. In particular, we calculate the four-fermion contribution from dimension six and eight operators, which dominates at large center of mass energy. We explore the relative size of the $\mathcal O(1/\Lambda^4)$ and $\mathcal O(1/\Lambda^2)$ results for various kinematic regimes and assumptions about the Wilson coefficients. Results for Drell-Yan production $pp \to \ell^+\ell^-$ at ${\cal{O}}(1/\Lambda^4)$ are also provided. Additionally, we develop the form for four fermion contact term contributions to $pp \to \ell^{+}\nu, \ell^-\bar \nu, pp \to \ell^+\ell^-$ of arbitrary mass dimension. This allows us to estimate the effects from even higher dimensional (dimension $> 8$) terms in the SMEFT framework.
|
1001.4843
|
Jen-Chi Lee
|
Jen-Chi Lee and Yi Yang
|
Regge Closed String Scattering and its Implication on Fixed angle Closed
String Scattering
|
10 pages. v2: typos corrected
| null |
10.1016/j.physletb.2010.03.004
| null |
hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We calculate the complete closed string high energy scattering amplitudes
(HSA) in the Regge regime for arbitrary mass levels. As an application, we
deduce the complete ratios among closed string HSA in the fixed angle regime by
using Stirling number identities. These results are in contrast with the
incomplete set of closed string HSA in the fixed angle regime calculated
previously. The complete forms of the fixed angle amplitudes, and hence the
ratios, were not calculable previously without the input of zero-norm state
calculation. This is mainly due to the lack of saddle point in the fixed angle
closed string calculation.
|
[
{
"created": "Wed, 27 Jan 2010 03:08:37 GMT",
"version": "v1"
},
{
"created": "Thu, 24 Sep 2015 09:31:53 GMT",
"version": "v2"
}
] |
2015-09-25
|
[
[
"Lee",
"Jen-Chi",
""
],
[
"Yang",
"Yi",
""
]
] |
We calculate the complete closed string high energy scattering amplitudes (HSA) in the Regge regime for arbitrary mass levels. As an application, we deduce the complete ratios among closed string HSA in the fixed angle regime by using Stirling number identities. These results are in contrast with the incomplete set of closed string HSA in the fixed angle regime calculated previously. The complete forms of the fixed angle amplitudes, and hence the ratios, were not calculable previously without the input of zero-norm state calculation. This is mainly due to the lack of saddle point in the fixed angle closed string calculation.
|
2407.16316
|
Qi Huang
|
Qi Huang, Rui Chen, Jun He, and Xiang Liu
|
Discovering a Novel Dynamics Mechanism for Charmonium Scattering
| null | null | null | null |
hep-ph
|
http://creativecommons.org/licenses/by-sa/4.0/
|
In this letter, we propose a novel mechanism for charmonium scattering that
utilizes the internal structure of charmonium. By capturing light flavor quarks
and anti-quarks from the vacuum, charm and anti-charm quarks form virtual
charmed mesons, which mediate an effective one-boson exchange process. This
approach accurately reproduces the di-$J/\psi$ invariant mass spectrum observed
by CMS and LHCb, demonstrating its validity. Our mechanism offers a
comprehensive framework for understanding charmonium scattering and is
applicable to the scattering problems involving all fully heavy hadrons, an
area of increasing interest.
|
[
{
"created": "Tue, 23 Jul 2024 09:11:25 GMT",
"version": "v1"
}
] |
2024-07-24
|
[
[
"Huang",
"Qi",
""
],
[
"Chen",
"Rui",
""
],
[
"He",
"Jun",
""
],
[
"Liu",
"Xiang",
""
]
] |
In this letter, we propose a novel mechanism for charmonium scattering that utilizes the internal structure of charmonium. By capturing light flavor quarks and anti-quarks from the vacuum, charm and anti-charm quarks form virtual charmed mesons, which mediate an effective one-boson exchange process. This approach accurately reproduces the di-$J/\psi$ invariant mass spectrum observed by CMS and LHCb, demonstrating its validity. Our mechanism offers a comprehensive framework for understanding charmonium scattering and is applicable to the scattering problems involving all fully heavy hadrons, an area of increasing interest.
|
1411.3676
|
Alessandro Sfondrini
|
Olof Ohlsson Sax, Alessandro Sfondrini, Bogdan Stefanski Jr
|
Integrability and the Conformal Field Theory of the Higgs branch
|
29 pages; v2: improved presentation and discussion, computations and
results unchanged
| null | null |
Imperial-TP-OOS-2014-05, HU-Mathematik-2014-33, HU-EP-14/49
|
hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In the context of the AdS$_3$/CFT$_2$ correspondence, we investigate the
Higgs branch CFT$_2$. Witten showed that states localised near the small
instanton singularity can be described in terms of vector multiplet variables.
This theory has a planar, weak-coupling limit, in which anomalous dimensions of
single-trace composite operators can be calculated. At one loop, the
calculation reduces to finding the spectrum of a spin-chain with
nearest-neighbour interactions. This CFT$_2$ spin-chain matches precisely the
one that was previously found as the weak-coupling limit of the integrable
system describing the AdS$_3$ side of the duality. We compute the one-loop
dilatation operator in a non-trivial compact subsector and show that it
corresponds to an integrable spin-chain Hamiltonian. This provides the first
direct evidence of integrability on the CFT$_2$ side of the correspondence.
|
[
{
"created": "Thu, 13 Nov 2014 19:37:17 GMT",
"version": "v1"
},
{
"created": "Thu, 7 May 2015 09:55:47 GMT",
"version": "v2"
}
] |
2015-05-08
|
[
[
"Sax",
"Olof Ohlsson",
""
],
[
"Sfondrini",
"Alessandro",
""
],
[
"Stefanski",
"Bogdan",
"Jr"
]
] |
In the context of the AdS$_3$/CFT$_2$ correspondence, we investigate the Higgs branch CFT$_2$. Witten showed that states localised near the small instanton singularity can be described in terms of vector multiplet variables. This theory has a planar, weak-coupling limit, in which anomalous dimensions of single-trace composite operators can be calculated. At one loop, the calculation reduces to finding the spectrum of a spin-chain with nearest-neighbour interactions. This CFT$_2$ spin-chain matches precisely the one that was previously found as the weak-coupling limit of the integrable system describing the AdS$_3$ side of the duality. We compute the one-loop dilatation operator in a non-trivial compact subsector and show that it corresponds to an integrable spin-chain Hamiltonian. This provides the first direct evidence of integrability on the CFT$_2$ side of the correspondence.
|
0809.0930
|
Jose Juan Blanco-Pillado
|
Jose J. Blanco-Pillado, Handhika S. Ramadhan and Noriko Shiiki
|
Skyrme Branes
|
14 pages, 6 figures
|
Phys.Rev.D79:085004,2009
|
10.1103/PhysRevD.79.085004
| null |
hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We obtain static selfgravitating solitonic 3-brane solutions in the
Einstein-Skyrme model in 7D. These solitons correspond to a smooth version of
the previously discussed cosmic p-brane solutions. We show how the energy
momentum tensor of the Skyrme field is able to smooth out the singularities
found in the thin wall approximation and falls fast enough with the distance
from the core of the object so that asymptotically approaches the flat cosmic
p-brane metric.
|
[
{
"created": "Thu, 4 Sep 2008 22:49:07 GMT",
"version": "v1"
}
] |
2009-07-29
|
[
[
"Blanco-Pillado",
"Jose J.",
""
],
[
"Ramadhan",
"Handhika S.",
""
],
[
"Shiiki",
"Noriko",
""
]
] |
We obtain static selfgravitating solitonic 3-brane solutions in the Einstein-Skyrme model in 7D. These solitons correspond to a smooth version of the previously discussed cosmic p-brane solutions. We show how the energy momentum tensor of the Skyrme field is able to smooth out the singularities found in the thin wall approximation and falls fast enough with the distance from the core of the object so that asymptotically approaches the flat cosmic p-brane metric.
|
1406.6540
|
Colferai Dimitri
|
Marcello Ciafaloni and Dimitri Colferai
|
Rescattering corrections and self-consistent metric in Planckian
scattering
|
39 pages, 14 figures
| null |
10.1007/JHEP10(2014)085
| null |
hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Starting from the ACV approach to transplanckian scattering, we present a
development of the reduced-action model in which the (improved) eikonal
representation is able to describe particles' motion at large scattering angle
and, furthermore, UV-safe (regular) rescattering solutions are found and
incorporated in the metric. The resulting particles' shock-waves undergo
calculable trajectory shifts and time delays during the scattering process ---
which turns out to be consistently described by both action and metric, up to
relative order $R^2/b^2$ in the gravitational radius over impact parameter
expansion. Some suggestions about the role and the (re)scattering properties of
irregular solutions --- not fully investigated here --- are also presented.
|
[
{
"created": "Wed, 25 Jun 2014 12:32:58 GMT",
"version": "v1"
},
{
"created": "Sun, 31 Aug 2014 16:56:27 GMT",
"version": "v2"
},
{
"created": "Fri, 17 Oct 2014 07:42:02 GMT",
"version": "v3"
}
] |
2015-06-22
|
[
[
"Ciafaloni",
"Marcello",
""
],
[
"Colferai",
"Dimitri",
""
]
] |
Starting from the ACV approach to transplanckian scattering, we present a development of the reduced-action model in which the (improved) eikonal representation is able to describe particles' motion at large scattering angle and, furthermore, UV-safe (regular) rescattering solutions are found and incorporated in the metric. The resulting particles' shock-waves undergo calculable trajectory shifts and time delays during the scattering process --- which turns out to be consistently described by both action and metric, up to relative order $R^2/b^2$ in the gravitational radius over impact parameter expansion. Some suggestions about the role and the (re)scattering properties of irregular solutions --- not fully investigated here --- are also presented.
|
hep-th/0311235
|
Jarah Evslin
|
Jarah Evslin
|
From E_8 to F via T
|
25 pages, 4 eps figures
|
JHEP 0408 (2004) 021
|
10.1088/1126-6708/2004/08/021
| null |
hep-th
| null |
We argue that T-duality and F-theory appear automatically in the E_8 gauge
bundle perspective of M-theory. The 11-dimensional supergravity four-form
determines an E_8 bundle. If we compactify on a two-torus, this data specifies
an LLE_8 bundle where LG is a centrally-extended loopgroup of G. If one of the
circles of the torus is smaller than sqrt(alpha') then it is also smaller than
a nontrivial circle S in the LLE_8 fiber and so a dimensional reduction on the
total space of the bundle is not valid. We conjecture that S is the circle on
which the T-dual type IIB theory is compactified, with the aforementioned torus
playing the role of the F-theory torus. As tests we reproduce the T-dualities
between NS5-branes and KK-monopoles, as well as D6 and D7-branes where we find
the desired F-theory monodromy. Using Hull's proposal for massive IIA, this
realization of T-duality allows us to confirm that the Romans mass is the
central extension of our LE_8. In addition this construction immediately
reproduces the conjectured formula for global topology change from T-duality
with H-flux.
|
[
{
"created": "Tue, 25 Nov 2003 12:24:11 GMT",
"version": "v1"
}
] |
2009-11-10
|
[
[
"Evslin",
"Jarah",
""
]
] |
We argue that T-duality and F-theory appear automatically in the E_8 gauge bundle perspective of M-theory. The 11-dimensional supergravity four-form determines an E_8 bundle. If we compactify on a two-torus, this data specifies an LLE_8 bundle where LG is a centrally-extended loopgroup of G. If one of the circles of the torus is smaller than sqrt(alpha') then it is also smaller than a nontrivial circle S in the LLE_8 fiber and so a dimensional reduction on the total space of the bundle is not valid. We conjecture that S is the circle on which the T-dual type IIB theory is compactified, with the aforementioned torus playing the role of the F-theory torus. As tests we reproduce the T-dualities between NS5-branes and KK-monopoles, as well as D6 and D7-branes where we find the desired F-theory monodromy. Using Hull's proposal for massive IIA, this realization of T-duality allows us to confirm that the Romans mass is the central extension of our LE_8. In addition this construction immediately reproduces the conjectured formula for global topology change from T-duality with H-flux.
|
hep-ph/9812330
|
Sergey Goloskokov
|
S.V.Goloskokov
|
Spin Asymmetries In Diffractive $J/\Psi$ Leptoproduction
|
4 pages, latex, two PS figures, presented at the International
Workshop "Symmetry and Spin" PRAHA'98
|
Czech.J.Phys. 49S2 (1999) 89-94
|
10.1007/s10582-999-0090-8
| null |
hep-ph
| null |
In this report we calculate the cross section and $A_{ll}$ asymmetry for the
diffractive $J/\Psi$ leptoproduction. We study dependences of the asymmetry on
the structure of the Pomeron-proton coupling
|
[
{
"created": "Fri, 11 Dec 1998 10:05:57 GMT",
"version": "v1"
}
] |
2009-10-31
|
[
[
"Goloskokov",
"S. V.",
""
]
] |
In this report we calculate the cross section and $A_{ll}$ asymmetry for the diffractive $J/\Psi$ leptoproduction. We study dependences of the asymmetry on the structure of the Pomeron-proton coupling
|
hep-th/9805163
|
Bernd J. Schroers
|
B. J. Schroers and F. A. Bais
|
S-duality in SU(3) Yang-Mills Theory with Non-abelian Unbroken Gauge
Group
|
27 pages, harvmac, amssym, one eps figure; minor misprints corrected
and title amended
|
Nucl.Phys. B535 (1998) 197-218
|
10.1016/S0550-3213(98)00581-1
|
ITFA-98-12
|
hep-th
| null |
It is observed that the magnetic charges of classical monopole solutions in
Yang-Mills-Higgs theory with non-abelian unbroken gauge group $H$ are in
one-to-one correspondence with coherent states of a dual or magnetic group
$\tilde H$. In the spirit of the Goddard-Nuyts-Olive conjecture this
observation is interpreted as evidence for a hidden magnetic symmetry of
Yang-Mills theory. SU(3) Yang-Mills-Higgs theory with unbroken gauge group U(2)
is studied in detail. The action of the magnetic group on semi-classical states
is given explicitly. Investigations of dyonic excitations show that electric
and magnetic symmetry are never manifest at the same time: Non-abelian magnetic
charge obstructs the realisation of electric symmetry and vice-versa. On the
basis of this fact the charge sectors in the theory are classified and their
fusion rules are discussed. Non-abelian electric-magnetic duality is formulated
as a map between charge sectors. Coherent states obey particularly simple
fusion rules, and in the set of coherent states S-duality can be formulated as
an SL(2,Z)-mapping between sectors which leaves the fusion rules invariant.
|
[
{
"created": "Mon, 25 May 1998 15:41:00 GMT",
"version": "v1"
},
{
"created": "Mon, 24 Aug 1998 15:45:37 GMT",
"version": "v2"
}
] |
2009-10-31
|
[
[
"Schroers",
"B. J.",
""
],
[
"Bais",
"F. A.",
""
]
] |
It is observed that the magnetic charges of classical monopole solutions in Yang-Mills-Higgs theory with non-abelian unbroken gauge group $H$ are in one-to-one correspondence with coherent states of a dual or magnetic group $\tilde H$. In the spirit of the Goddard-Nuyts-Olive conjecture this observation is interpreted as evidence for a hidden magnetic symmetry of Yang-Mills theory. SU(3) Yang-Mills-Higgs theory with unbroken gauge group U(2) is studied in detail. The action of the magnetic group on semi-classical states is given explicitly. Investigations of dyonic excitations show that electric and magnetic symmetry are never manifest at the same time: Non-abelian magnetic charge obstructs the realisation of electric symmetry and vice-versa. On the basis of this fact the charge sectors in the theory are classified and their fusion rules are discussed. Non-abelian electric-magnetic duality is formulated as a map between charge sectors. Coherent states obey particularly simple fusion rules, and in the set of coherent states S-duality can be formulated as an SL(2,Z)-mapping between sectors which leaves the fusion rules invariant.
|
hep-ph/9911360
|
Sandro Ambrosanio
|
Sandro Ambrosanio (CERN), Grahame A. Blair (U. of London)
|
Extracting GMSB Parameters at a Linear Collider
|
6 pages, LaTeX + epsf.sty, 3 figures
| null | null |
CERN-TH/99-348
|
hep-ph
| null |
Assuming gauge-mediated supersymmetry breaking, we simulate precision
measurements of fundamental parameters at a 500 GeV e+e- linear collider in the
scenario where a neutralino is the next-to-lightest supersymmetric particle.
Information on the supersymmetry breaking and the messenger sectors of the
theory is extracted from realistic fits to the measured mass spectrum of the
Minimal Supersymmetric Model particles and the next-to-lightest supersymmetric
particle lifetime.
|
[
{
"created": "Mon, 15 Nov 1999 16:04:59 GMT",
"version": "v1"
}
] |
2007-05-23
|
[
[
"Ambrosanio",
"Sandro",
"",
"CERN"
],
[
"Blair",
"Grahame A.",
"",
"U. of London"
]
] |
Assuming gauge-mediated supersymmetry breaking, we simulate precision measurements of fundamental parameters at a 500 GeV e+e- linear collider in the scenario where a neutralino is the next-to-lightest supersymmetric particle. Information on the supersymmetry breaking and the messenger sectors of the theory is extracted from realistic fits to the measured mass spectrum of the Minimal Supersymmetric Model particles and the next-to-lightest supersymmetric particle lifetime.
|
hep-ph/9609282
|
Alan R. White
|
Alan R. White
|
The Hard Gluon Component of the QCD Pomeron
|
8 pages, with 7 ps figures in the text
| null | null |
ANL-HEP-CP-96-74
|
hep-ph
| null |
We argue that deep-inelastic diffractive scaling provides fundamental insight
into the QCD Pomeron. The logarithmic scaling violations seen experimentally
are in conflict with the scale-invariance of the BFKL Pomeron and with
phenomenological two-gluon models. Instead the Pomeron appears as a single
gluon at short-distances, indicating the appearance of a Super-Critical phase
of Reggeon Field Theory. That the color compensation takes place at a longer
distance is consistent with the Pomeron carrying odd color charge parity.
|
[
{
"created": "Fri, 6 Sep 1996 21:51:25 GMT",
"version": "v1"
}
] |
2007-05-23
|
[
[
"White",
"Alan R.",
""
]
] |
We argue that deep-inelastic diffractive scaling provides fundamental insight into the QCD Pomeron. The logarithmic scaling violations seen experimentally are in conflict with the scale-invariance of the BFKL Pomeron and with phenomenological two-gluon models. Instead the Pomeron appears as a single gluon at short-distances, indicating the appearance of a Super-Critical phase of Reggeon Field Theory. That the color compensation takes place at a longer distance is consistent with the Pomeron carrying odd color charge parity.
|
hep-th/0605187
|
Alexandra De Castro
|
A. De Castro and L. Quevedo
|
Non-singlet Q-deformed N=(1,0) and N=(1,1/2) U(1) actions
|
14 pages, typos corrected, equation (2.8) replaced by a more
illustrative one, version to appear in PLB
|
Phys.Lett.B639:117-123,2006
|
10.1016/j.physletb.2006.06.013
| null |
hep-th
| null |
In this paper we construct N=(1,0) and N=(1,1/2) non-singlet Q-deformed
supersymmetric U(1) actions in components. We obtain an exact expression for
the enhanced supersymmetry action by turning off particular degrees of freedom
of the deformation tensor. We analyze the behavior of the action upon restoring
weekly some of the deformation parameters, obtaining a non trivial interaction
term between a scalar and the gauge field, breaking the supersymmetry down to
N=(1,0). Additionally, we present the corresponding set of unbroken
supersymmetry transformations. We work in harmonic superspace in four Euclidean
dimensions.
|
[
{
"created": "Thu, 18 May 2006 18:04:43 GMT",
"version": "v1"
},
{
"created": "Tue, 20 Jun 2006 08:55:40 GMT",
"version": "v2"
}
] |
2008-11-26
|
[
[
"De Castro",
"A.",
""
],
[
"Quevedo",
"L.",
""
]
] |
In this paper we construct N=(1,0) and N=(1,1/2) non-singlet Q-deformed supersymmetric U(1) actions in components. We obtain an exact expression for the enhanced supersymmetry action by turning off particular degrees of freedom of the deformation tensor. We analyze the behavior of the action upon restoring weekly some of the deformation parameters, obtaining a non trivial interaction term between a scalar and the gauge field, breaking the supersymmetry down to N=(1,0). Additionally, we present the corresponding set of unbroken supersymmetry transformations. We work in harmonic superspace in four Euclidean dimensions.
|
hep-th/9612231
|
Michael P. Mattis
|
N. Dorey (Swansea), V.V. Khoze (Durham), M.P. Mattis (Los Alamos)
|
On Mass-Deformed N=4 Supersymmetric Yang-Mills Theory
|
12 pages, uses harvmac.tex, minus-sign fixed
|
Phys.Lett. B396 (1997) 141-149
|
10.1016/S0370-2693(97)00102-0
| null |
hep-th
| null |
We construct the n-instanton action for the above model with gauge group
SU(2), as a function of the collective coordinates of the general self-dual
configurations of Atiyah, Drinfeld, Hitchin and Manin (ADHM). We calculate the
quantum modulus u = <Tr(A^2)> at the 1-instanton level, and find a discrepancy
with Seiberg and Witten's proposed exact solution. As in related models (N=2,
N_F=3 or 4), this discrepancy may be resolved by modifying their proposed
relation between $\tilde u$ (the parameter in the elliptic curve) and u.
|
[
{
"created": "Tue, 24 Dec 1996 19:27:19 GMT",
"version": "v1"
},
{
"created": "Thu, 26 Dec 1996 15:47:42 GMT",
"version": "v2"
}
] |
2009-10-30
|
[
[
"Dorey",
"N.",
"",
"Swansea"
],
[
"Khoze",
"V. V.",
"",
"Durham"
],
[
"Mattis",
"M. P.",
"",
"Los Alamos"
]
] |
We construct the n-instanton action for the above model with gauge group SU(2), as a function of the collective coordinates of the general self-dual configurations of Atiyah, Drinfeld, Hitchin and Manin (ADHM). We calculate the quantum modulus u = <Tr(A^2)> at the 1-instanton level, and find a discrepancy with Seiberg and Witten's proposed exact solution. As in related models (N=2, N_F=3 or 4), this discrepancy may be resolved by modifying their proposed relation between $\tilde u$ (the parameter in the elliptic curve) and u.
|
2401.14789
|
Rajeev Singh
|
Wojciech Florkowski, Radoslaw Ryblewski, Rajeev Singh
|
Study of spin polarization dependence on rapidity, transverse momentum,
and azimuthal angle
|
Contribution to SPIN 2023
|
Proceedings of Science PoS(SPIN2023)227
| null | null |
hep-ph nucl-th
|
http://creativecommons.org/licenses/by/4.0/
|
We investigate the spacetime evolution of spin polarization within a
hydrodynamic framework based on the de Groot--van Leeuwen--van Weert
expressions for energy-momentum and spin tensors. The system's deviation from
boost invariance results in the interplay of different spin polarization
components, impacting spin observables. We specifically examine the transverse
momentum, azimuthal angle, and rapidity dependence of the mean spin
polarization vector of $\Lambda$ hyperons. Our results qualitatively align with
other models and experimental data on global spin polarization rapidity
dependence. While the quadrupole structure is absent in the longitudinal
component at midrapidity, our analysis reveals non-trivial signal at forward
rapidities that differs from predictions based on the Bjorken expansion.
|
[
{
"created": "Fri, 26 Jan 2024 11:24:13 GMT",
"version": "v1"
}
] |
2024-05-28
|
[
[
"Florkowski",
"Wojciech",
""
],
[
"Ryblewski",
"Radoslaw",
""
],
[
"Singh",
"Rajeev",
""
]
] |
We investigate the spacetime evolution of spin polarization within a hydrodynamic framework based on the de Groot--van Leeuwen--van Weert expressions for energy-momentum and spin tensors. The system's deviation from boost invariance results in the interplay of different spin polarization components, impacting spin observables. We specifically examine the transverse momentum, azimuthal angle, and rapidity dependence of the mean spin polarization vector of $\Lambda$ hyperons. Our results qualitatively align with other models and experimental data on global spin polarization rapidity dependence. While the quadrupole structure is absent in the longitudinal component at midrapidity, our analysis reveals non-trivial signal at forward rapidities that differs from predictions based on the Bjorken expansion.
|
2103.13422
|
Victor Godet
|
Victor Godet and Charles Marteau
|
From black holes to baby universes in CGHS gravity
|
55 pages, v2: minor changes, published version
| null |
10.1007/JHEP07(2021)138
| null |
hep-th gr-qc
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study $\widehat{\text{CGHS}}$ gravity, a variant of the matterless
Callan-Giddings-Harvey-Strominger model. We show that it describes a universal
sector of the near horizon perturbations of non-extremal black holes in higher
dimensions. In many respects this theory can be viewed as a flat space analog
of Jackiw-Teitelboim gravity. The result for the Euclidean path integral
implies that $\widehat{\text{CGHS}}$ is dual to a Gaussian ensemble that we
describe in detail. The simplicity of this theory allows us to compute exact
quantities such as the quenched free energy and provides a useful playground to
study baby universes, averages and factorization. We also give evidence for the
existence of a non-perturbative completion in terms of a matrix model. Finally,
flat wormhole solutions are discussed.
|
[
{
"created": "Wed, 24 Mar 2021 18:09:11 GMT",
"version": "v1"
},
{
"created": "Mon, 28 Jun 2021 09:29:06 GMT",
"version": "v2"
}
] |
2021-07-22
|
[
[
"Godet",
"Victor",
""
],
[
"Marteau",
"Charles",
""
]
] |
We study $\widehat{\text{CGHS}}$ gravity, a variant of the matterless Callan-Giddings-Harvey-Strominger model. We show that it describes a universal sector of the near horizon perturbations of non-extremal black holes in higher dimensions. In many respects this theory can be viewed as a flat space analog of Jackiw-Teitelboim gravity. The result for the Euclidean path integral implies that $\widehat{\text{CGHS}}$ is dual to a Gaussian ensemble that we describe in detail. The simplicity of this theory allows us to compute exact quantities such as the quenched free energy and provides a useful playground to study baby universes, averages and factorization. We also give evidence for the existence of a non-perturbative completion in terms of a matrix model. Finally, flat wormhole solutions are discussed.
|
hep-th/0102053
|
Kuratov
|
I.V.Kostyakov, N.A.Gromov, V.V.Kuratov
|
On root systems in spaces with degenerate metric
|
10 pages, Latex. Report given at XXIII Int. Colloquium on Group
Theoretical Methods in Physics, July 31 - August 05, 2000, Dubna (Russia)
| null | null | null |
hep-th
| null |
A root systems in Carroll spaces with degenerate metric are defined. It is
shown that their Cartan matrices and reflection groups are affine. With the
help of the geometric consideration the root system structure of affine
algebras is determined by a sufficiently simple algorithm.
|
[
{
"created": "Fri, 9 Feb 2001 13:54:51 GMT",
"version": "v1"
}
] |
2007-05-23
|
[
[
"Kostyakov",
"I. V.",
""
],
[
"Gromov",
"N. A.",
""
],
[
"Kuratov",
"V. V.",
""
]
] |
A root systems in Carroll spaces with degenerate metric are defined. It is shown that their Cartan matrices and reflection groups are affine. With the help of the geometric consideration the root system structure of affine algebras is determined by a sufficiently simple algorithm.
|
hep-ph/0309232
|
Emidio Gabrielli
|
Anindya Datta, Emidio Gabrielli, Barbara Mele
|
Violation of Angular Momentum Selection Rules in Quantum Gravity
|
Latex 15 pages, 2 eps figures; improved text
|
Phys.Lett. B579 (2004) 189-199
|
10.1016/j.physletb.2003.11.003
| null |
hep-ph gr-qc hep-th
| null |
A simple consequence of the angular momentum conservation in quantum field
theories is that the interference of s-channel amplitudes exchanging particles
with different spin J vanishes after complete angular integration. We show
that, while this rule holds in scattering processes mediated by a massive
graviton in Quantum Gravity, a massless graviton s-channel exchange breaks
orthogonality when considering its interference with a scalar-particle
s-channel exchange, whenever all the external states are massive. As a
consequence, we find that, in the Einstein theory, unitarity implies that
angular momentum is not conserved at quantum level in the graviton coupling to
massive matter fields. This result can be interpreted as a new anomaly,
revealing unknown aspects of the well-known van Dam - Veltman - Zakharov
discontinuity.
|
[
{
"created": "Fri, 19 Sep 2003 13:59:42 GMT",
"version": "v1"
},
{
"created": "Wed, 15 Oct 2003 19:44:27 GMT",
"version": "v2"
}
] |
2015-06-25
|
[
[
"Datta",
"Anindya",
""
],
[
"Gabrielli",
"Emidio",
""
],
[
"Mele",
"Barbara",
""
]
] |
A simple consequence of the angular momentum conservation in quantum field theories is that the interference of s-channel amplitudes exchanging particles with different spin J vanishes after complete angular integration. We show that, while this rule holds in scattering processes mediated by a massive graviton in Quantum Gravity, a massless graviton s-channel exchange breaks orthogonality when considering its interference with a scalar-particle s-channel exchange, whenever all the external states are massive. As a consequence, we find that, in the Einstein theory, unitarity implies that angular momentum is not conserved at quantum level in the graviton coupling to massive matter fields. This result can be interpreted as a new anomaly, revealing unknown aspects of the well-known van Dam - Veltman - Zakharov discontinuity.
|
2106.13222
|
Franziska Hagelstein
|
Gilberto Colangelo, Franziska Hagelstein, Martin Hoferichter, Laetitia
Laub and Peter Stoffer
|
Short-distance constraints for the longitudinal component of the
hadronic light-by-light amplitude: an update
|
14 pages, 6 figures, 1 table, published version
|
Eur. Phys. J. C 81 (2021) 8, 702
|
10.1140/epjc/s10052-021-09513-x
|
PSI-PR-21-13, UWThPh 2021-7
|
hep-ph hep-lat nucl-th
|
http://creativecommons.org/licenses/by/4.0/
|
We reassess the impact of short-distance constraints for the longitudinal
component of the hadronic light-by-light amplitude on the anomalous magnetic
moment of the muon, $a_\mu=(g-2)_\mu/2$, by comparing different solutions that
have recently appeared in the literature. In particular, we analyze the
relevance of the exact axial anomaly and its impact on $a_\mu$ and conclude
that it remains rather limited. We show that all recently proposed solutions
agree well within uncertainties on the numerical estimate of the impact of
short-distance constraints on $a_\mu$, despite differences in the concrete
implementation. We also take into account the recently calculated perturbative
corrections to the massless quark loop to update our estimate and outline the
path towards future improvements.
|
[
{
"created": "Thu, 24 Jun 2021 17:57:10 GMT",
"version": "v1"
},
{
"created": "Mon, 9 Aug 2021 09:52:58 GMT",
"version": "v2"
}
] |
2021-08-10
|
[
[
"Colangelo",
"Gilberto",
""
],
[
"Hagelstein",
"Franziska",
""
],
[
"Hoferichter",
"Martin",
""
],
[
"Laub",
"Laetitia",
""
],
[
"Stoffer",
"Peter",
""
]
] |
We reassess the impact of short-distance constraints for the longitudinal component of the hadronic light-by-light amplitude on the anomalous magnetic moment of the muon, $a_\mu=(g-2)_\mu/2$, by comparing different solutions that have recently appeared in the literature. In particular, we analyze the relevance of the exact axial anomaly and its impact on $a_\mu$ and conclude that it remains rather limited. We show that all recently proposed solutions agree well within uncertainties on the numerical estimate of the impact of short-distance constraints on $a_\mu$, despite differences in the concrete implementation. We also take into account the recently calculated perturbative corrections to the massless quark loop to update our estimate and outline the path towards future improvements.
|
2108.09849
|
Katarzyna Helena Wichmann
|
Benjamin Nachman, Katarzyna Wichmann and Pia Zurita
|
Structure Functions and Parton Densities: a Session Summary
|
Proceedings for the DIS2021 Conference, Submission to SciPost, update
of the references
| null | null | null |
hep-ph hep-ex
|
http://creativecommons.org/licenses/by/4.0/
|
Studies of fragmentation and parton density functions are a core component of
researchin high energy particle and nuclear physics. These quantities are
inherently interestingas a probe of the quantum nature of the strong force and
are also essential ingredients toadditional studies in high energy scattering
experiments. These proceedings provide anoverview of the state of the art in
this area, as presented at the Deep-Inelastic ScatteringConference in the
Spring of 2021.
|
[
{
"created": "Sun, 22 Aug 2021 21:17:50 GMT",
"version": "v1"
},
{
"created": "Wed, 25 Aug 2021 19:19:30 GMT",
"version": "v2"
}
] |
2021-08-27
|
[
[
"Nachman",
"Benjamin",
""
],
[
"Wichmann",
"Katarzyna",
""
],
[
"Zurita",
"Pia",
""
]
] |
Studies of fragmentation and parton density functions are a core component of researchin high energy particle and nuclear physics. These quantities are inherently interestingas a probe of the quantum nature of the strong force and are also essential ingredients toadditional studies in high energy scattering experiments. These proceedings provide anoverview of the state of the art in this area, as presented at the Deep-Inelastic ScatteringConference in the Spring of 2021.
|
1302.3825
|
James P. Kneller
|
James P. Kneller, Alex W. Mauney
|
The consequences of large \theta_13 for the turbulence signatures in
supernova neutrinos
| null | null |
10.1103/PhysRevD.88.025004
| null |
hep-ph astro-ph.SR
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The set of transition probabilities for a single neutrino emitted from a
point source after passage through a turbulent supernova density profile have
been found to be random variates drawn from parent distributions whose
properties depend upon the stage of the explosion, the neutrino energy and
mixing parameters, the observed channel, and the properties of the turbulence
such as the amplitude C*. In this paper we examine the consequences of the
recently measured mixing angle \theta_13 upon the neutrino flavor
transformation in supernova when passing through turbulence. We find the
measurements of a relatively large value of \theta_13 means the neutrinos are
relatively immune to small, C* < 1%, amplitude turbulence but as C* increases
the turbulence effects grow rapidly and spread to all mixing channels. For C* >
10% the turbulence effects in the high (H) density resonance mixing channels
are independent of \theta_13 but non-resonant mixing channels are more
sensitive to turbulence when \theta_13 is large.
|
[
{
"created": "Fri, 15 Feb 2013 18:05:15 GMT",
"version": "v1"
}
] |
2015-06-15
|
[
[
"Kneller",
"James P.",
""
],
[
"Mauney",
"Alex W.",
""
]
] |
The set of transition probabilities for a single neutrino emitted from a point source after passage through a turbulent supernova density profile have been found to be random variates drawn from parent distributions whose properties depend upon the stage of the explosion, the neutrino energy and mixing parameters, the observed channel, and the properties of the turbulence such as the amplitude C*. In this paper we examine the consequences of the recently measured mixing angle \theta_13 upon the neutrino flavor transformation in supernova when passing through turbulence. We find the measurements of a relatively large value of \theta_13 means the neutrinos are relatively immune to small, C* < 1%, amplitude turbulence but as C* increases the turbulence effects grow rapidly and spread to all mixing channels. For C* > 10% the turbulence effects in the high (H) density resonance mixing channels are independent of \theta_13 but non-resonant mixing channels are more sensitive to turbulence when \theta_13 is large.
|
hep-th/0612101
|
Dongsu Bak
|
Dongsu Bak, Nobuyoshi Ohta, and Paul K. Townsend
|
The D2 Susy Zoo
|
28 pages, 1 figure; v2: minor corrections
|
JHEP 0703:013,2007
|
10.1088/1126-6708/2007/03/013
|
DAMTP-2006-108, KU-TP 010, UOSTP-06-104
|
hep-th
| null |
We present new supersymmetric solutions of the Dirac-Born-Infeld equations
for time-independent D2-branes, including a 1/2 supersymmetric `dyonic'
D2-brane and various 1/4 supersymmetric configurations that include `twisted'
supertubes, superfunnels with arbitrary planar cross-section, asymptotically
planar D2-branes, and non-singular intersections of `magnetic' D2-branes. Our
analysis is exhaustive for D2-branes in three space dimensions.
|
[
{
"created": "Tue, 12 Dec 2006 00:29:52 GMT",
"version": "v1"
},
{
"created": "Thu, 21 Dec 2006 15:52:00 GMT",
"version": "v2"
}
] |
2010-10-27
|
[
[
"Bak",
"Dongsu",
""
],
[
"Ohta",
"Nobuyoshi",
""
],
[
"Townsend",
"Paul K.",
""
]
] |
We present new supersymmetric solutions of the Dirac-Born-Infeld equations for time-independent D2-branes, including a 1/2 supersymmetric `dyonic' D2-brane and various 1/4 supersymmetric configurations that include `twisted' supertubes, superfunnels with arbitrary planar cross-section, asymptotically planar D2-branes, and non-singular intersections of `magnetic' D2-branes. Our analysis is exhaustive for D2-branes in three space dimensions.
|
0803.1592
|
Guidal
|
M. Guidal
|
Discussion on the recent proton-DVCS results of Jefferson Lab
|
proceeding of the Photon2007 conference (International Conference on
the Structure and Interactions of the Photon, Paris 9-13 July 2007)
|
Nucl.Phys.Proc.Suppl.184:234-238,2008
|
10.1016/j.nuclphysbps.2008.09.171
| null |
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We present the recent data issued from the Halls A and B of Jefferson
Laboratory for the Deep Virtual Compton Scattering Process on the proton. An
important set of data for beam spin asymmetries, unpolarized cross sections and
differences of polarized cross sections have been obtained. We modestly attempt
a first "global" analysis of these three observables at a single $<x_B>$,
$<Q^2>$ and $<-t>$ kinematic point. We find that it is extremely challenging to
describe simultaneously these data in the framework of a few Generalized Parton
Distributions models.
|
[
{
"created": "Tue, 11 Mar 2008 14:05:24 GMT",
"version": "v1"
},
{
"created": "Thu, 13 Mar 2008 22:26:13 GMT",
"version": "v2"
}
] |
2008-12-18
|
[
[
"Guidal",
"M.",
""
]
] |
We present the recent data issued from the Halls A and B of Jefferson Laboratory for the Deep Virtual Compton Scattering Process on the proton. An important set of data for beam spin asymmetries, unpolarized cross sections and differences of polarized cross sections have been obtained. We modestly attempt a first "global" analysis of these three observables at a single $<x_B>$, $<Q^2>$ and $<-t>$ kinematic point. We find that it is extremely challenging to describe simultaneously these data in the framework of a few Generalized Parton Distributions models.
|
hep-ph/0001235
|
Stefano Bertolini
|
Stefano Bertolini
|
The Delta I = 1/2 Rule and epsilon'/epsilon in the Chiral Quark Model
|
10 pages. Proceedings of the Dafne99 Workshop, Nov. 16-19, 1999
|
Frascati Phys.Ser. 16 (1999) 205-214
| null | null |
hep-ph
| null |
I discuss the role of the Delta I = 1/2 selection rule in K -> pi pi decays
for the theoretical calculations of eps'/eps. Lacking reliable ``first
principle'' calculations, phenomenological approaches may help in understanding
correlations among different contributions and available experimental data. In
particular, in the chiral quark model approach the same dynamics which
underlies the Delta I = 1/2 selection rule in kaon decays appears to enhance
the K -> pi pi matrix elements of the gluonic penguins, thus driving eps'/eps
in the range of the recent experimental measurements.
|
[
{
"created": "Mon, 24 Jan 2000 07:41:07 GMT",
"version": "v1"
}
] |
2007-05-23
|
[
[
"Bertolini",
"Stefano",
""
]
] |
I discuss the role of the Delta I = 1/2 selection rule in K -> pi pi decays for the theoretical calculations of eps'/eps. Lacking reliable ``first principle'' calculations, phenomenological approaches may help in understanding correlations among different contributions and available experimental data. In particular, in the chiral quark model approach the same dynamics which underlies the Delta I = 1/2 selection rule in kaon decays appears to enhance the K -> pi pi matrix elements of the gluonic penguins, thus driving eps'/eps in the range of the recent experimental measurements.
|
1212.5605
|
Jacob Bourjaily
|
Nima Arkani-Hamed, Jacob L. Bourjaily, Freddy Cachazo, Alexander B.
Goncharov, Alexander Postnikov, and Jaroslav Trnka
|
Scattering Amplitudes and the Positive Grassmannian
|
a handful of minor corrections and citations added/updated; 158
pages, 264 figures
| null | null | null |
hep-th math.AG math.CO
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We establish a direct connection between scattering amplitudes in planar
four-dimensional theories and a remarkable mathematical structure known as the
positive Grassmannian. The central physical idea is to focus on on-shell
diagrams as objects of fundamental importance to scattering amplitudes. We show
that the all-loop integrand in N=4 SYM is naturally represented in this way.
On-shell diagrams in this theory are intimately tied to a variety of
mathematical objects, ranging from a new graphical representation of
permutations to a beautiful stratification of the Grassmannian G(k,n) which
generalizes the notion of a simplex in projective space. All physically
important operations involving on-shell diagrams map to canonical operations on
permutations; in particular, BCFW deformations correspond to adjacent
transpositions. Each cell of the positive Grassmannian is naturally endowed
with positive coordinates and an invariant measure which determines the
on-shell function associated with the diagram. This understanding allows us to
classify and compute all on-shell diagrams, and give a geometric understanding
for all the non-trivial relations among them. Yangian invariance of scattering
amplitudes is transparently represented by diffeomorphisms of G(k,n) which
preserve the positive structure. Scattering amplitudes in (1+1)-dimensional
integrable systems and the ABJM theory in (2+1) dimensions can both be
understood as special cases of these ideas. On-shell diagrams in theories with
less (or no) supersymmetry are associated with exactly the same structures in
the Grassmannian, but with a measure deformed by a factor encoding ultraviolet
singularities. The Grassmannian representation of on-shell processes also gives
a new understanding of the all-loop integrand for scattering amplitudes,
presenting all integrands in a novel dLog form which directly reflects the
underlying positive structure.
|
[
{
"created": "Fri, 21 Dec 2012 21:00:02 GMT",
"version": "v1"
},
{
"created": "Mon, 17 Mar 2014 17:30:40 GMT",
"version": "v2"
}
] |
2014-03-18
|
[
[
"Arkani-Hamed",
"Nima",
""
],
[
"Bourjaily",
"Jacob L.",
""
],
[
"Cachazo",
"Freddy",
""
],
[
"Goncharov",
"Alexander B.",
""
],
[
"Postnikov",
"Alexander",
""
],
[
"Trnka",
"Jaroslav",
""
]
] |
We establish a direct connection between scattering amplitudes in planar four-dimensional theories and a remarkable mathematical structure known as the positive Grassmannian. The central physical idea is to focus on on-shell diagrams as objects of fundamental importance to scattering amplitudes. We show that the all-loop integrand in N=4 SYM is naturally represented in this way. On-shell diagrams in this theory are intimately tied to a variety of mathematical objects, ranging from a new graphical representation of permutations to a beautiful stratification of the Grassmannian G(k,n) which generalizes the notion of a simplex in projective space. All physically important operations involving on-shell diagrams map to canonical operations on permutations; in particular, BCFW deformations correspond to adjacent transpositions. Each cell of the positive Grassmannian is naturally endowed with positive coordinates and an invariant measure which determines the on-shell function associated with the diagram. This understanding allows us to classify and compute all on-shell diagrams, and give a geometric understanding for all the non-trivial relations among them. Yangian invariance of scattering amplitudes is transparently represented by diffeomorphisms of G(k,n) which preserve the positive structure. Scattering amplitudes in (1+1)-dimensional integrable systems and the ABJM theory in (2+1) dimensions can both be understood as special cases of these ideas. On-shell diagrams in theories with less (or no) supersymmetry are associated with exactly the same structures in the Grassmannian, but with a measure deformed by a factor encoding ultraviolet singularities. The Grassmannian representation of on-shell processes also gives a new understanding of the all-loop integrand for scattering amplitudes, presenting all integrands in a novel dLog form which directly reflects the underlying positive structure.
|
1912.06811
|
Nilakshi Das
|
Nilakshi Das and Rupak Dutta
|
Implication of $b \to c\tau\nu$ flavor anomalies on $B_s\rightarrow
{D_s^*}\tau\nu$ decay observables
|
15 pages, 3 figures, 10 tables
| null |
10.1088/1361-6471/aba422
| null |
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The experimental predictions of $R_D$, $R_{D^*}$, $R_{J/\psi}$,
$P_\tau^{D^*}$ and $F_L^{D^*}$ in $B$ decays mediated via $b\,\to\, c\, l\,\nu$
quark level transition deviate significantly from the standard model
expectations. The current world average of the ratio of branching ratios $R_D$
and $R_{D^*}$ in $B\,\to\, D^{(*)}\, l\,\nu$ ($l\in e,\tau$) show $1.4\sigma$
and $2.5\sigma$ deviation from the SM expectations. Similarly, the $\tau$
polarization fraction $P_{\tau}^{D^*}$ and the longitudinal polarization
fraction of the $D^*$ meson $F_L^{D^*}$ in $B\,\to\, D^*\,\tau\,\nu$ are found
to deviate from the standard model expectations at $1.6\sigma$ and $1.5\sigma$
level, respectively. In addition, the ratio of branching ratio $R_{J/\psi}$ in
$B_c\,\to\,{J/\psi}\, l\,\nu$ deviates from the standard model prediction at
$2\sigma$ level. In this regard, we study the implication of $R_D$, $R_{D^*}$,
$R_{J/\psi}$, $P_\tau^{D^*}$, and $F_L^{D^*}$ anomalies on $B_s\,\to\,
{D^*_s}\,\tau\,\nu$ decay observables in a model independent effective field
theory formalism. We give predictions of several physical observables in the
standard model and in the presence of various $1D$ and $2D$ new physics
scenarios.
|
[
{
"created": "Sat, 14 Dec 2019 09:26:04 GMT",
"version": "v1"
}
] |
2020-10-28
|
[
[
"Das",
"Nilakshi",
""
],
[
"Dutta",
"Rupak",
""
]
] |
The experimental predictions of $R_D$, $R_{D^*}$, $R_{J/\psi}$, $P_\tau^{D^*}$ and $F_L^{D^*}$ in $B$ decays mediated via $b\,\to\, c\, l\,\nu$ quark level transition deviate significantly from the standard model expectations. The current world average of the ratio of branching ratios $R_D$ and $R_{D^*}$ in $B\,\to\, D^{(*)}\, l\,\nu$ ($l\in e,\tau$) show $1.4\sigma$ and $2.5\sigma$ deviation from the SM expectations. Similarly, the $\tau$ polarization fraction $P_{\tau}^{D^*}$ and the longitudinal polarization fraction of the $D^*$ meson $F_L^{D^*}$ in $B\,\to\, D^*\,\tau\,\nu$ are found to deviate from the standard model expectations at $1.6\sigma$ and $1.5\sigma$ level, respectively. In addition, the ratio of branching ratio $R_{J/\psi}$ in $B_c\,\to\,{J/\psi}\, l\,\nu$ deviates from the standard model prediction at $2\sigma$ level. In this regard, we study the implication of $R_D$, $R_{D^*}$, $R_{J/\psi}$, $P_\tau^{D^*}$, and $F_L^{D^*}$ anomalies on $B_s\,\to\, {D^*_s}\,\tau\,\nu$ decay observables in a model independent effective field theory formalism. We give predictions of several physical observables in the standard model and in the presence of various $1D$ and $2D$ new physics scenarios.
|
hep-th/0503216
|
Adam Falkowski
|
Kiwoon Choi, Adam Falkowski, Hans Peter Nilles, Marek Olechowski
|
Soft Supersymmetry Breaking in KKLT Flux Compactification
|
minor corrections, references added, version accepted in NPB
|
Nucl.Phys.B718:113-133,2005
|
10.1016/j.nuclphysb.2005.04.032
|
IFT-05-05, KAIST-TH 2005/04, DESY-05-052
|
hep-th hep-ph
| null |
We examine the structure of soft supersymmetry breaking terms in KKLT models
of flux compactification with low energy supersymmetry. Moduli are stabilized
by fluxes and nonperturbative dynamics while a de Sitter vacuum is obtained by
adding supersymmetry breaking anti-branes. We discuss the characteristic
pattern of mass scales in such a set-up as well as some features of 4D N=1
supergravity breakdown by anti-branes. Anomaly mediation is found to always
give an important contribution and one can easily arrange for
flavor-independent soft terms. In its most attractive realization, the modulus
mediation is comparable to the anomaly mediation, yielding a quite distinctive
sparticle spectrum. In addition, the axion component of the modulus/dilaton
superfield dynamically cancels the relative CP phase between the contributions
of anomaly and modulus mediation, thereby avoiding dangerous SUSY CP violation.
|
[
{
"created": "Mon, 28 Mar 2005 02:31:57 GMT",
"version": "v1"
},
{
"created": "Wed, 4 May 2005 16:16:14 GMT",
"version": "v2"
}
] |
2008-11-26
|
[
[
"Choi",
"Kiwoon",
""
],
[
"Falkowski",
"Adam",
""
],
[
"Nilles",
"Hans Peter",
""
],
[
"Olechowski",
"Marek",
""
]
] |
We examine the structure of soft supersymmetry breaking terms in KKLT models of flux compactification with low energy supersymmetry. Moduli are stabilized by fluxes and nonperturbative dynamics while a de Sitter vacuum is obtained by adding supersymmetry breaking anti-branes. We discuss the characteristic pattern of mass scales in such a set-up as well as some features of 4D N=1 supergravity breakdown by anti-branes. Anomaly mediation is found to always give an important contribution and one can easily arrange for flavor-independent soft terms. In its most attractive realization, the modulus mediation is comparable to the anomaly mediation, yielding a quite distinctive sparticle spectrum. In addition, the axion component of the modulus/dilaton superfield dynamically cancels the relative CP phase between the contributions of anomaly and modulus mediation, thereby avoiding dangerous SUSY CP violation.
|
hep-th/0201188
|
W. F. Kao
|
Chiang-Mei Chen and W.F. Kao
|
Stability of the Anisotropic Brane Cosmology
|
14 pages, 6 figures
| null | null | null |
hep-th
| null |
The stability of the Bianchi type I anisotropic brane cosmology is analyzed
in this paper. We also study the effect of the brane solution by comparing the
models on the 3-brane and the models in the conventional Einstein's space.
Analysis is presented for two different models: one with a perfect fluid and
the other one with a dilaton field. It is shown that the anisotropic expansion
is smeared out dynamically for both theories in the large time limit
independent of the models with different types of matter. The initial states
are, however, dramatically different. A primordial anisotropic expansion will
grow for the conventional Einstein's theory. On the other hand, it is shown
that the initial state is highly isotropic for the brane universe except for a
very particular case. Moreover, it is also shown that the Bianchi type I
anisotropic cosmology is stable against any anisotropic perturbation for both
theories in the large time limit.
|
[
{
"created": "Thu, 24 Jan 2002 15:56:42 GMT",
"version": "v1"
}
] |
2007-05-23
|
[
[
"Chen",
"Chiang-Mei",
""
],
[
"Kao",
"W. F.",
""
]
] |
The stability of the Bianchi type I anisotropic brane cosmology is analyzed in this paper. We also study the effect of the brane solution by comparing the models on the 3-brane and the models in the conventional Einstein's space. Analysis is presented for two different models: one with a perfect fluid and the other one with a dilaton field. It is shown that the anisotropic expansion is smeared out dynamically for both theories in the large time limit independent of the models with different types of matter. The initial states are, however, dramatically different. A primordial anisotropic expansion will grow for the conventional Einstein's theory. On the other hand, it is shown that the initial state is highly isotropic for the brane universe except for a very particular case. Moreover, it is also shown that the Bianchi type I anisotropic cosmology is stable against any anisotropic perturbation for both theories in the large time limit.
|
1106.4849
|
Alfredo Perez
|
Alfredo Perez, David Tempo, Ricardo Troncoso
|
Gravitational solitons, hairy black holes and phase transitions in BHT
massive gravity
|
20 pages, 1 figure
|
JHEP 1107:093,2011
|
10.1007/JHEP07(2011)093
|
CECS-PHY-10/14
|
hep-th gr-qc
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Hairy black holes and gravitational solitons in three dimensions for the new
massive gravity theory proposed by Bergshoeff, Hohm and Townsend (BHT) are
considered at the special case when there is a unique maximally symmetric
solution. Following the Brown-York approach with suitable counterterms, it is
shown that the soliton possesses a fixed negative mass which coincides with the
one of AdS spacetime regardless the value of the integration constant that
describes it. Hence, the soliton can be naturally regarded as a degenerate
ground state labeled by a single modulus parameter. The Euclidean action,
endowed with suitable counterterms, is shown to be finite and independent of
modulus and hair parameters for both classes of solutions, and in the case of
hairy black holes the free energy in the semiclassical approximation is
reproduced. Modular invariance allows to show that the gravitational hair turns
out to be determined by the modulus parameter. According to Cardy's formula, it
is shown that the semiclassical entropy agrees with the microscopic counting of
states provided the modulus parameter of the ground state is spontaneously
fixed, which suggests that the hairy black hole is in a broken phase of the
theory. Indeed, it is found that there is a critical temperature characterizing
a first order phase transition between the static hairy black hole and the
soliton which, due to the existence of gravitational hair, can take place in
the semiclassical regime.
|
[
{
"created": "Thu, 23 Jun 2011 22:36:18 GMT",
"version": "v1"
}
] |
2011-07-28
|
[
[
"Perez",
"Alfredo",
""
],
[
"Tempo",
"David",
""
],
[
"Troncoso",
"Ricardo",
""
]
] |
Hairy black holes and gravitational solitons in three dimensions for the new massive gravity theory proposed by Bergshoeff, Hohm and Townsend (BHT) are considered at the special case when there is a unique maximally symmetric solution. Following the Brown-York approach with suitable counterterms, it is shown that the soliton possesses a fixed negative mass which coincides with the one of AdS spacetime regardless the value of the integration constant that describes it. Hence, the soliton can be naturally regarded as a degenerate ground state labeled by a single modulus parameter. The Euclidean action, endowed with suitable counterterms, is shown to be finite and independent of modulus and hair parameters for both classes of solutions, and in the case of hairy black holes the free energy in the semiclassical approximation is reproduced. Modular invariance allows to show that the gravitational hair turns out to be determined by the modulus parameter. According to Cardy's formula, it is shown that the semiclassical entropy agrees with the microscopic counting of states provided the modulus parameter of the ground state is spontaneously fixed, which suggests that the hairy black hole is in a broken phase of the theory. Indeed, it is found that there is a critical temperature characterizing a first order phase transition between the static hairy black hole and the soliton which, due to the existence of gravitational hair, can take place in the semiclassical regime.
|
2002.04558
|
Temple He
|
Temple He, Veronika E. Hubeny, and Mukund Rangamani
|
Superbalance of Holographic Entropy Inequalities
|
21 pages, 6 figures; v2: Minor clarification comments, version to
appear in JHEP
| null |
10.1007/JHEP07(2020)245
| null |
hep-th math.CO quant-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The domain of allowed von Neumann entropies of a holographic field theory
carves out a polyhedral cone -- the holographic entropy cone -- in entropy
space. Such polyhedral cones are characterized by their extreme rays. For an
arbitrary number of parties, it is known that the so-called perfect tensors are
extreme rays. In this work, we constrain the form of the remaining extreme rays
by showing that they correspond to geometries with vanishing mutual information
between any two parties, ensuring the absence of Bell pair type entanglement
between them. This is tantamount to proving that besides subadditivity, all
non-redundant holographic entropy inequalities are superbalanced, i.e. not only
do UV divergences cancel in the inequality itself (assuming smooth entangling
surfaces), but also in the purification thereof.
|
[
{
"created": "Tue, 11 Feb 2020 17:24:44 GMT",
"version": "v1"
},
{
"created": "Tue, 7 Jul 2020 17:37:59 GMT",
"version": "v2"
}
] |
2020-08-26
|
[
[
"He",
"Temple",
""
],
[
"Hubeny",
"Veronika E.",
""
],
[
"Rangamani",
"Mukund",
""
]
] |
The domain of allowed von Neumann entropies of a holographic field theory carves out a polyhedral cone -- the holographic entropy cone -- in entropy space. Such polyhedral cones are characterized by their extreme rays. For an arbitrary number of parties, it is known that the so-called perfect tensors are extreme rays. In this work, we constrain the form of the remaining extreme rays by showing that they correspond to geometries with vanishing mutual information between any two parties, ensuring the absence of Bell pair type entanglement between them. This is tantamount to proving that besides subadditivity, all non-redundant holographic entropy inequalities are superbalanced, i.e. not only do UV divergences cancel in the inequality itself (assuming smooth entangling surfaces), but also in the purification thereof.
|
hep-ph/9702250
|
Bob Holdom
|
B. Holdom
|
Dynamical Nonsupersymmetry Breaking
|
13 pages, 2 figures, Talk given at the International Workshop on
Perspectives of Strong Coupling Gauge Theories (SCGT96), November 1996,
Nagoya, Japan
| null | null |
UTPT-97-02
|
hep-ph
| null |
We emphasize the role that anomalous power-law scaling of 4-fermion
operators, occurring in the presence of new strong interactions, could have in
the generation of quark and lepton masses.
|
[
{
"created": "Tue, 4 Feb 1997 19:04:58 GMT",
"version": "v1"
}
] |
2007-05-23
|
[
[
"Holdom",
"B.",
""
]
] |
We emphasize the role that anomalous power-law scaling of 4-fermion operators, occurring in the presence of new strong interactions, could have in the generation of quark and lepton masses.
|
hep-ph/0608025
|
Bruce Knuteson
|
Bruce Knuteson
|
Solution to the LHC Inverse Problem
|
Talk presented at DIS 2006 and PHENO 2006; 4 pages
| null |
10.1142/9789812706706_0078
| null |
hep-ph hep-ex
| null |
The "LHC Inverse Problem" refers to the question of determining the
underlying physical theory giving rise to the signals expected to be seen at
the Large Hadron Collider. The solution to this problem (Bard) is reviewed. The
combination of CDF and D0 data is motivated.
|
[
{
"created": "Wed, 2 Aug 2006 21:30:51 GMT",
"version": "v1"
}
] |
2017-08-23
|
[
[
"Knuteson",
"Bruce",
""
]
] |
The "LHC Inverse Problem" refers to the question of determining the underlying physical theory giving rise to the signals expected to be seen at the Large Hadron Collider. The solution to this problem (Bard) is reviewed. The combination of CDF and D0 data is motivated.
|
2206.13038
|
Wei-Zhong Zhao
|
Rui Wang, Fan Liu, Chun-Hong Zhang, Wei-Zhong Zhao
|
Superintegrability for ($\beta$-deformed) partition function hierarchies
with $W$-representations
|
11 pages
|
Eur. Phys. J. C 82 (2022) 902
|
10.1140/epjc/s10052-022-10875-z
| null |
hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We construct the ($\beta$-deformed) partition function hierarchies with
$W$-representations. Based on the $W$-representations, we analyze the
superintegrability property and derive their character expansions with respect
to the Schur functions and Jack polynomials, respectively. Some well known
superintegrable matrix models such as the Gaussian hermitian one-matrix model
(in the external field), $N\times N$ complex matrix model, $\beta$-deformed
Gaussian hermitian and rectangular complex matrix models are contained in the
constructed hierarchies.
|
[
{
"created": "Mon, 27 Jun 2022 04:01:36 GMT",
"version": "v1"
},
{
"created": "Thu, 21 Jul 2022 09:10:42 GMT",
"version": "v2"
}
] |
2022-10-26
|
[
[
"Wang",
"Rui",
""
],
[
"Liu",
"Fan",
""
],
[
"Zhang",
"Chun-Hong",
""
],
[
"Zhao",
"Wei-Zhong",
""
]
] |
We construct the ($\beta$-deformed) partition function hierarchies with $W$-representations. Based on the $W$-representations, we analyze the superintegrability property and derive their character expansions with respect to the Schur functions and Jack polynomials, respectively. Some well known superintegrable matrix models such as the Gaussian hermitian one-matrix model (in the external field), $N\times N$ complex matrix model, $\beta$-deformed Gaussian hermitian and rectangular complex matrix models are contained in the constructed hierarchies.
|
hep-ph/0702026
|
Massimo Passera
|
S. Eidelman, M. Giacomini, F.V. Ignatov and M. Passera
|
The tau lepton anomalous magnetic moment
|
6 pages. To appear in the proceedings of the Tau06 Workshop, Pisa,
Italy, September 19-22 2006
|
Nucl.Phys.Proc.Suppl.169:226-231,2007
|
10.1016/j.nuclphysbps.2007.03.002
| null |
hep-ph
| null |
We review the Standard Model prediction of the tau lepton g-2 presenting
updated QED and electroweak contributions, as well as recent determinations of
the leading-order hadronic term, based on the low energy e+e- data, and of the
hadronic light-by-light one.
|
[
{
"created": "Fri, 2 Feb 2007 14:16:26 GMT",
"version": "v1"
}
] |
2008-11-26
|
[
[
"Eidelman",
"S.",
""
],
[
"Giacomini",
"M.",
""
],
[
"Ignatov",
"F. V.",
""
],
[
"Passera",
"M.",
""
]
] |
We review the Standard Model prediction of the tau lepton g-2 presenting updated QED and electroweak contributions, as well as recent determinations of the leading-order hadronic term, based on the low energy e+e- data, and of the hadronic light-by-light one.
|
1906.05310
|
Cesar Arias
|
Cesar Arias, Felipe Diaz, Rodrigo Olea and Per Sundell
|
Liouville description of conical defects in dS$_4$, Gibbons-Hawking
entropy as modular entropy, and dS$_3$ holography
|
V3: 22 pages and 3 figures. Published version
|
JHEP04(2020)124
|
10.1007/JHEP04(2020)124
| null |
hep-th gr-qc
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We model the back-reaction of a static observer in four-dimensional de Sitter
spacetime by means of a singular $\mathbb Z_q$ quotient. The set of fixed
points of the $\mathbb Z_q$ action consists of a pair of codimension two
minimal surfaces given by 2-spheres in the Euclidean geometry. The introduction
of an orbifold parameter $q>1$ permits the construction of an effective action
for the bulk gravity theory with support on each of these minimal surfaces. The
effective action corresponds to that of Liouville field theory on a 2-sphere
with a finite vacuum expectation value of the Liouville field. The intrinsic
Liouville theory description yields a thermal Cardy entropy that we reintrepret
as a modular free energy at temperature $T=q^{-1}$, whereupon the
Gibbons--Hawking entropy arises as the corresponding modular entropy. We
further observe that in the limit $q\to\infty$ the four-dimensional geometry
reduces to that of global dS$_3$ spacetime, where the two original minimal
surfaces can be mapped to the future and past infinities of dS$_3$ by means of
a double Wick rotation. In this limit, the Liouville theories on the minimal
surfaces become boundary theories at zero temperature whose total central
charge equals that computed using the dS$_3$/CFT$_2$ correspondence.
|
[
{
"created": "Wed, 12 Jun 2019 18:02:42 GMT",
"version": "v1"
},
{
"created": "Sat, 18 Jan 2020 22:35:40 GMT",
"version": "v2"
},
{
"created": "Wed, 22 Apr 2020 22:16:52 GMT",
"version": "v3"
}
] |
2020-05-28
|
[
[
"Arias",
"Cesar",
""
],
[
"Diaz",
"Felipe",
""
],
[
"Olea",
"Rodrigo",
""
],
[
"Sundell",
"Per",
""
]
] |
We model the back-reaction of a static observer in four-dimensional de Sitter spacetime by means of a singular $\mathbb Z_q$ quotient. The set of fixed points of the $\mathbb Z_q$ action consists of a pair of codimension two minimal surfaces given by 2-spheres in the Euclidean geometry. The introduction of an orbifold parameter $q>1$ permits the construction of an effective action for the bulk gravity theory with support on each of these minimal surfaces. The effective action corresponds to that of Liouville field theory on a 2-sphere with a finite vacuum expectation value of the Liouville field. The intrinsic Liouville theory description yields a thermal Cardy entropy that we reintrepret as a modular free energy at temperature $T=q^{-1}$, whereupon the Gibbons--Hawking entropy arises as the corresponding modular entropy. We further observe that in the limit $q\to\infty$ the four-dimensional geometry reduces to that of global dS$_3$ spacetime, where the two original minimal surfaces can be mapped to the future and past infinities of dS$_3$ by means of a double Wick rotation. In this limit, the Liouville theories on the minimal surfaces become boundary theories at zero temperature whose total central charge equals that computed using the dS$_3$/CFT$_2$ correspondence.
|
hep-th/9111054
| null |
A. Das, E. Sezgin and S.J. Sin
|
The Super W_\INFTY Symmetry of the Manin-Radul Super KP Hierarchy
|
(12 pages)
|
Phys.Lett.B277:435-441,1992
|
10.1016/0370-2693(92)91806-K
| null |
hep-th
| null |
We show that the Manin-Radul super KP hierarchy is invariant under super
W_\infty transformations. These transformations are characterized by time
dependent flows which commute with the usual flows generated by the conserved
quantities of the super KP hierarchy.
|
[
{
"created": "Mon, 25 Nov 1991 20:24:00 GMT",
"version": "v1"
}
] |
2008-11-26
|
[
[
"Das",
"A.",
""
],
[
"Sezgin",
"E.",
""
],
[
"Sin",
"S. J.",
""
]
] |
We show that the Manin-Radul super KP hierarchy is invariant under super W_\infty transformations. These transformations are characterized by time dependent flows which commute with the usual flows generated by the conserved quantities of the super KP hierarchy.
|
hep-th/0703112
|
Yaron Antebi
|
Yaron E. Antebi and Tomer Volansky
|
Dynamical Supersymmetry Breaking from Simple Quivers
|
4 pages, revtex4; An error was corrected following [arXiv:0707.0298]
|
Phys.Rev.D77:026001,2008
|
10.1103/PhysRevD.77.026001
|
WIS/04/07-MARCH-DPP
|
hep-th
| null |
We construct a simple local model of dynamical supersymmetry breaking. The
model is a one generation SU(5) that arises from a IIB Z_N orientifold. It does
not admit a runaway direction and is argued to stabilize the blowup mode
related to the corresponding U(1) factor. The theory demonstrates the existence
of a new class of "blowup" fractional branes. We further discuss a compact
realization of the quiver on a Calabi-Yau 3-fold which enables one to add
fluxes and stabilize the complex structure moduli.
|
[
{
"created": "Mon, 12 Mar 2007 14:10:42 GMT",
"version": "v1"
},
{
"created": "Wed, 5 Dec 2007 10:32:33 GMT",
"version": "v2"
}
] |
2008-11-26
|
[
[
"Antebi",
"Yaron E.",
""
],
[
"Volansky",
"Tomer",
""
]
] |
We construct a simple local model of dynamical supersymmetry breaking. The model is a one generation SU(5) that arises from a IIB Z_N orientifold. It does not admit a runaway direction and is argued to stabilize the blowup mode related to the corresponding U(1) factor. The theory demonstrates the existence of a new class of "blowup" fractional branes. We further discuss a compact realization of the quiver on a Calabi-Yau 3-fold which enables one to add fluxes and stabilize the complex structure moduli.
|
2203.02803
|
Danilo Moreira
|
D. C. Moreira, F. A. Brito, D. Bazeia
|
Localized scalar structures around static black holes
|
Matches published version in Nuclear Physics B
| null |
10.1016/j.nuclphysb.2023.116090
| null |
hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this work we address a way to capture scalar field solutions on static
spacetimes by using BPS formalism and relaxing the general covariance
condition. We focus on configurations where the background geometry describes
topological black holes and present both analytical and numerical solutions, in
addition to discussing the use of conserved charges associated to such field
configurations. The obtained solutions are radially stable and the zero-mode
arising from the stability equation can be written analytically.
|
[
{
"created": "Sat, 5 Mar 2022 19:02:36 GMT",
"version": "v1"
},
{
"created": "Wed, 20 Apr 2022 13:36:10 GMT",
"version": "v2"
},
{
"created": "Wed, 4 Jan 2023 18:51:53 GMT",
"version": "v3"
},
{
"created": "Fri, 20 Jan 2023 00:31:00 GMT",
"version": "v4"
},
{
"created": "Fri, 3 Feb 2023 18:48:27 GMT",
"version": "v5"
}
] |
2023-02-06
|
[
[
"Moreira",
"D. C.",
""
],
[
"Brito",
"F. A.",
""
],
[
"Bazeia",
"D.",
""
]
] |
In this work we address a way to capture scalar field solutions on static spacetimes by using BPS formalism and relaxing the general covariance condition. We focus on configurations where the background geometry describes topological black holes and present both analytical and numerical solutions, in addition to discussing the use of conserved charges associated to such field configurations. The obtained solutions are radially stable and the zero-mode arising from the stability equation can be written analytically.
|
hep-th/0503170
|
Antonello Scardicchio
|
A. Scardicchio
|
Casimir dynamics: Interactions of Surfaces with codimension >1 due to
Quantum Fluctuations
|
21 pages, 3 figures. Published version
|
Phys.Rev. D72 (2005) 065004
|
10.1103/PhysRevD.72.065004
| null |
hep-th cond-mat.stat-mech
| null |
We study the Casimir force between defects (branes) of co-dimension larger
than 1 due to quantum fluctuations of a scalar field $\phi$ living in the bulk.
We show that the Casimir force is attractive and that it diverges as the
distance between the branes approaches a critical value $L_c$. Below this
critical distance $L_c$ the vacuum state $\phi=0$ of the theory is unstable,
due to the birth of a tachyon, and the field condenses.
|
[
{
"created": "Tue, 22 Mar 2005 23:48:09 GMT",
"version": "v1"
},
{
"created": "Thu, 22 Sep 2005 21:16:04 GMT",
"version": "v2"
}
] |
2009-11-11
|
[
[
"Scardicchio",
"A.",
""
]
] |
We study the Casimir force between defects (branes) of co-dimension larger than 1 due to quantum fluctuations of a scalar field $\phi$ living in the bulk. We show that the Casimir force is attractive and that it diverges as the distance between the branes approaches a critical value $L_c$. Below this critical distance $L_c$ the vacuum state $\phi=0$ of the theory is unstable, due to the birth of a tachyon, and the field condenses.
|
hep-th/0404232
|
Sabine Hossenfelder
|
S. Hossenfelder
|
Suppressed Black Hole Production from Minimal Length
|
6 pages, 2 figures
|
Phys.Lett.B598:92-98,2004
|
10.1016/j.physletb.2004.07.056
| null |
hep-th hep-ph
| null |
Large extra dimensions lower the Planck scale to values soon accessible.
Motivated by string theory, the models of large extra dimensions predict a vast
number of new effects in the energy range of the lowered Planck scale, among
them the production of TeV-mass black holes. But not only is the Planck scale
the energy scale at which effects of modified gravity become important. String
theory as well as noncommutative quantum mechanics suggest that the Planck
length acts a a minimal length in nature, providing a natural ultraviolet
cutoff and a limit to the possible resolution of spacetime. The minimal length
effects thus become important in the same energy range in which the black holes
are expected to form.
In this paper we examine the influence of the minimal length on the expected
production rate of the black holes.
|
[
{
"created": "Wed, 28 Apr 2004 22:16:25 GMT",
"version": "v1"
},
{
"created": "Thu, 29 Jul 2004 00:13:09 GMT",
"version": "v2"
}
] |
2014-11-18
|
[
[
"Hossenfelder",
"S.",
""
]
] |
Large extra dimensions lower the Planck scale to values soon accessible. Motivated by string theory, the models of large extra dimensions predict a vast number of new effects in the energy range of the lowered Planck scale, among them the production of TeV-mass black holes. But not only is the Planck scale the energy scale at which effects of modified gravity become important. String theory as well as noncommutative quantum mechanics suggest that the Planck length acts a a minimal length in nature, providing a natural ultraviolet cutoff and a limit to the possible resolution of spacetime. The minimal length effects thus become important in the same energy range in which the black holes are expected to form. In this paper we examine the influence of the minimal length on the expected production rate of the black holes.
|
0809.4773
|
Kochelev Nikolai Innokentevich
|
N.I.Kochelev
|
Instantons and Spin-Flavor effects in Hadron Physics
|
6 pages, 4 figures, based on the talk given at the XV Annual Seminar
"Nonlinear Phenomena in Complex Systems", Belarus, May 20-23, 2008
| null | null | null |
hep-ph hep-ex nucl-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We discuss the role of instantons in the spectroscopy of ordinary and exotic
hadrons as well as in high energy reactions. We argue that the instanton
induced flavor- and spin-dependent quark-quark and quark-gluon interactions can
explain many features of the hadron spectrum. The observed anomalous spin and
flavor effects in various reactions with hadrons can also be understood within
the instanton model for QCD vacuum.
|
[
{
"created": "Sat, 27 Sep 2008 14:09:40 GMT",
"version": "v1"
},
{
"created": "Tue, 30 Sep 2008 06:50:54 GMT",
"version": "v2"
},
{
"created": "Mon, 6 Oct 2008 14:26:03 GMT",
"version": "v3"
}
] |
2008-10-06
|
[
[
"Kochelev",
"N. I.",
""
]
] |
We discuss the role of instantons in the spectroscopy of ordinary and exotic hadrons as well as in high energy reactions. We argue that the instanton induced flavor- and spin-dependent quark-quark and quark-gluon interactions can explain many features of the hadron spectrum. The observed anomalous spin and flavor effects in various reactions with hadrons can also be understood within the instanton model for QCD vacuum.
|
1904.00032
|
David Meltzer
|
Soner Albayrak, David Meltzer, David Poland
|
More Analytic Bootstrap: Nonperturbative Effects and Fermions
|
37 pages, 4 figures, 2 tables, v2: Improved discussion of generating
function and updated results for Ising and O(2) model
| null |
10.1007/JHEP08(2019)040
| null |
hep-th cond-mat.stat-mech
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We develop the analytic bootstrap in several directions. First, we discuss
the appearance of nonperturbative effects in the Lorentzian inversion formula,
which are exponentially suppressed at large spin but important at finite spin.
We show that these effects are important for precision applications of the
analytic bootstrap in the context of the 3d Ising and O(2) models. In the
former they allow us to reproduce the spin-2 stress tensor with error at the
$10^{-5}$ level while in the latter requiring that we reproduce the stress
tensor allows us to predict the coupling to the leading charge-2 operator. We
also extend perturbative calculations in the lightcone bootstrap to fermion
4-point functions in 3d, predicting the leading and subleading asymptotic
behavior for the double-twist operators built out of two fermions.
|
[
{
"created": "Fri, 29 Mar 2019 18:09:15 GMT",
"version": "v1"
},
{
"created": "Wed, 29 May 2019 22:40:30 GMT",
"version": "v2"
}
] |
2019-09-04
|
[
[
"Albayrak",
"Soner",
""
],
[
"Meltzer",
"David",
""
],
[
"Poland",
"David",
""
]
] |
We develop the analytic bootstrap in several directions. First, we discuss the appearance of nonperturbative effects in the Lorentzian inversion formula, which are exponentially suppressed at large spin but important at finite spin. We show that these effects are important for precision applications of the analytic bootstrap in the context of the 3d Ising and O(2) models. In the former they allow us to reproduce the spin-2 stress tensor with error at the $10^{-5}$ level while in the latter requiring that we reproduce the stress tensor allows us to predict the coupling to the leading charge-2 operator. We also extend perturbative calculations in the lightcone bootstrap to fermion 4-point functions in 3d, predicting the leading and subleading asymptotic behavior for the double-twist operators built out of two fermions.
|
1408.2915
|
Rodrigo Bufalo
|
R. Bufalo
|
Lorentz-violating effects in three-dimensional $QED$
|
14 pages, to appear at Int. J. Mod. Phys. A
|
Int. J. Mod. Phys. A 29, 1450112 (2014)
|
10.1142/S0217751X14501127
| null |
hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Inspired in discussions presented lately regarding Lorentz-violating
interaction terms in \cite{13,6}, we propose here a slightly different version
for the coupling term. We will consider a modified quantum electrodynamics with
violation of Lorentz symmetry defined in a $\left( 2+1\right) $-dimensional
spacetime. We define the Lagrangian density with a Lorentz-violating
interaction, where the the spacetime dimensionality is explicitly taken into
account in its definition. The work encompasses an analysis of this model at
both zero and finite-temperature, where very interesting features are known to
occur due to the spacetime dimensionality. With that in mind we expect that the
spacetime dimensionality may provide new insights about the radiative
generation of higher-derivative terms into the action, implying in a new
Lorentz-violating electrodynamics, as well the nonminimal coupling may provide
interesting implications on the thermodynamical quantities.
|
[
{
"created": "Wed, 13 Aug 2014 05:42:29 GMT",
"version": "v1"
}
] |
2014-08-19
|
[
[
"Bufalo",
"R.",
""
]
] |
Inspired in discussions presented lately regarding Lorentz-violating interaction terms in \cite{13,6}, we propose here a slightly different version for the coupling term. We will consider a modified quantum electrodynamics with violation of Lorentz symmetry defined in a $\left( 2+1\right) $-dimensional spacetime. We define the Lagrangian density with a Lorentz-violating interaction, where the the spacetime dimensionality is explicitly taken into account in its definition. The work encompasses an analysis of this model at both zero and finite-temperature, where very interesting features are known to occur due to the spacetime dimensionality. With that in mind we expect that the spacetime dimensionality may provide new insights about the radiative generation of higher-derivative terms into the action, implying in a new Lorentz-violating electrodynamics, as well the nonminimal coupling may provide interesting implications on the thermodynamical quantities.
|
hep-ph/9608312
|
Kevin S. McFarland
|
K.S. McFarland
|
Comment on Leptophobic Bosons and $\nu N$ Neutral Current Scattering
Data
|
LaTeX, 3 pages, 1 embedded PS figure, available at
http://cordelia.fnal.gov/~ksmcf/publications/moriond_comment.ps.gz .
Presented at the XXXIieme Rencontres de Moriond, Electroweak Interactions and
Unified Theories
| null | null |
FERMILAB-Conf-96/228
|
hep-ph
| null |
The relevance of existing $\nu N$ deep inelastic scattering data to models
containing a leptophobic neutral vector boson is discussed. It is shown that
this neutral current data is in good agreement with the Standard Model and
disfavors such a leptophobic boson.
|
[
{
"created": "Tue, 13 Aug 1996 21:23:05 GMT",
"version": "v1"
}
] |
2007-05-23
|
[
[
"McFarland",
"K. S.",
""
]
] |
The relevance of existing $\nu N$ deep inelastic scattering data to models containing a leptophobic neutral vector boson is discussed. It is shown that this neutral current data is in good agreement with the Standard Model and disfavors such a leptophobic boson.
|
1907.11193
|
Carlos Arg\"uelles Delgado
|
Carlos A. Arg\"uelles and Hrvoje Dujmovic (for the IceCube
Collaboration)
|
Searches for Connections Between Dark Matter and Neutrinos with the
IceCube High-Energy Starting Event Sample
|
Presented at the 36th International Cosmic Ray Conference (ICRC
2019). See arXiv:1907.11699 for all IceCube contributions, 6 pages, 2 figures
| null | null |
PoS-ICRC2019-839
|
hep-ph hep-ex
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The nature of dark matter remains one of the most important open questions in
physics. Although dark matter effects have only been observed gravitationally,
the order-one ratio between conventional matter and dark matter hints to a
non-gravitational link between them. In this contribution, we search for such a
link using the IceCube high-energy starting event (HESE) sample, which contains
some of the highest energy neutrinos ever observed. These are dominated by a
yet unidentified high-energy diffuse astrophysical component. Using these
events we look for evidence of an excess due to dark matter decay or
annihilation, and also for a novel signature due to high-energy neutrinos
scattering with dark matter. Finally, in this contribution, we will summarize
and highlight the complementarity between the obtained limits for these two
scenarios.
|
[
{
"created": "Thu, 25 Jul 2019 16:53:43 GMT",
"version": "v1"
},
{
"created": "Wed, 21 Aug 2019 22:07:54 GMT",
"version": "v2"
}
] |
2019-08-23
|
[
[
"Argüelles",
"Carlos A.",
"",
"for the IceCube\n Collaboration"
],
[
"Dujmovic",
"Hrvoje",
"",
"for the IceCube\n Collaboration"
]
] |
The nature of dark matter remains one of the most important open questions in physics. Although dark matter effects have only been observed gravitationally, the order-one ratio between conventional matter and dark matter hints to a non-gravitational link between them. In this contribution, we search for such a link using the IceCube high-energy starting event (HESE) sample, which contains some of the highest energy neutrinos ever observed. These are dominated by a yet unidentified high-energy diffuse astrophysical component. Using these events we look for evidence of an excess due to dark matter decay or annihilation, and also for a novel signature due to high-energy neutrinos scattering with dark matter. Finally, in this contribution, we will summarize and highlight the complementarity between the obtained limits for these two scenarios.
|
1103.2315
|
James Rafferty
|
James Rafferty
|
Holographic Roberge-Weiss Transitions II: Defect Theories and the
Sakai-Sugimoto Model
|
39 pages, 12 figures. references added, Sakai-Sugimoto section
revised, version to appear in JHEP
|
JHEP 1109:087,2011
|
10.1007/JHEP09(2011)087
| null |
hep-th hep-lat
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We extend the work of Aarts et al., including an imaginary chemical potential
for quark number into the Sakai-Sugimoto model and codimension k defect
theories. The phase diagram of these models are a function of three parameters,
the temperature, chemical potential and the asymptotic separation of the
flavour branes, related to a mass for the quarks in the boundary theories. We
compute the phase diagrams and the pressure due to the flavours of the theories
as a function of these parameters and show that there are Roberge-Weiss
transitions in the high temperature phases, chiral symmetry restored for the
Sakai-Sugimoto model and deconfined for the defect models, while at low
temperatures there are no Roberge-Weiss transitions. In all the models we
consider the transitions between low and high temperature phases are first
order, hence the points where they meet the Roberge-Weiss lines are triple
points. The pressure for the defect theories scales in the way we expect from
dimensional analysis while the Sakai-Sugimoto model exhibits unusual scaling.
We show that the models we consider are analytic in \mu^2 when \mu^2 is small.
|
[
{
"created": "Fri, 11 Mar 2011 17:08:01 GMT",
"version": "v1"
},
{
"created": "Mon, 9 May 2011 12:27:16 GMT",
"version": "v2"
},
{
"created": "Wed, 7 Sep 2011 21:32:14 GMT",
"version": "v3"
}
] |
2015-03-19
|
[
[
"Rafferty",
"James",
""
]
] |
We extend the work of Aarts et al., including an imaginary chemical potential for quark number into the Sakai-Sugimoto model and codimension k defect theories. The phase diagram of these models are a function of three parameters, the temperature, chemical potential and the asymptotic separation of the flavour branes, related to a mass for the quarks in the boundary theories. We compute the phase diagrams and the pressure due to the flavours of the theories as a function of these parameters and show that there are Roberge-Weiss transitions in the high temperature phases, chiral symmetry restored for the Sakai-Sugimoto model and deconfined for the defect models, while at low temperatures there are no Roberge-Weiss transitions. In all the models we consider the transitions between low and high temperature phases are first order, hence the points where they meet the Roberge-Weiss lines are triple points. The pressure for the defect theories scales in the way we expect from dimensional analysis while the Sakai-Sugimoto model exhibits unusual scaling. We show that the models we consider are analytic in \mu^2 when \mu^2 is small.
|
2305.13963
|
Michael Kenna-Allison
|
Callum Hunter, Michael Kenna-Allison
|
Non-minimal Scalar Effective Cosmology
|
13 pages, 0 figures
| null | null | null |
hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this work we investigate the most general non-minimally coupled
$\mathbb{Z}_2$ symmetric scalar-tensor effective field theory (EFT) of gravity
up to dimension six in the operator expansion. The most general action is
presented along with its equations of motion both in the covariant form and
also in the coordinate form resulting from an FLRW analysis. The pressure and
density of the scalar field are found as well as the equation of state
parameter and some cosmological parameters. We analyse the background evolution
of the scalar field within the framework of the slow-roll approximation and
provide a brief discussion of $\mathbb{Z}_2$ symmetry breaking of the scalar
field which gives an order of magnitude constraint on one of the coupling
constants. To provide a concrete example we choose a couple of potentials for
the scalar field and explore the cosmology. Some brief comments on the range of
validity of the EFT are also offered as well as the connections between the
general model and well-known examples in the literature.
|
[
{
"created": "Tue, 23 May 2023 11:41:41 GMT",
"version": "v1"
}
] |
2023-05-24
|
[
[
"Hunter",
"Callum",
""
],
[
"Kenna-Allison",
"Michael",
""
]
] |
In this work we investigate the most general non-minimally coupled $\mathbb{Z}_2$ symmetric scalar-tensor effective field theory (EFT) of gravity up to dimension six in the operator expansion. The most general action is presented along with its equations of motion both in the covariant form and also in the coordinate form resulting from an FLRW analysis. The pressure and density of the scalar field are found as well as the equation of state parameter and some cosmological parameters. We analyse the background evolution of the scalar field within the framework of the slow-roll approximation and provide a brief discussion of $\mathbb{Z}_2$ symmetry breaking of the scalar field which gives an order of magnitude constraint on one of the coupling constants. To provide a concrete example we choose a couple of potentials for the scalar field and explore the cosmology. Some brief comments on the range of validity of the EFT are also offered as well as the connections between the general model and well-known examples in the literature.
|
1706.05669
|
Zeinab Amoozad
|
Z. Amoozad, J. Sadeghi
|
Diffusion constant of slowly rotating black three-brane
| null |
Phys. Lett. B 776,58-63(2018)
|
10.1016/j.physletb.2017.11.024
| null |
hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper, we take the slowly rotating black three-brane background and
perturb it by introducing a vector gauge field. We find the components of the
gauge field through Maxwell equations and Bianchi identities. Using currents
and some ansatz we find Fick's first law at long wavelength regime. An
interesting result for this non-trivial supergravity background is that the
diffusion constant on the stretched horizon which emerges from Fick's first law
is a complex constant. The pure imaginary part of the diffusion constant
appears because the black three-brane has angular momentum. By taking the
static limit of the corresponding black brane the well known diffusion constant
will be recovered. On the other hand, from the point of view of the Fick's
second law, we have the dispersion relation $\omega=-iDq^{2}$ and we found a
damping of hydrodynamical flow in the holographically dual theory. Existence of
imaginary term in the diffusion constant introduces an oscillating propagation
of the gauge field in the dual field theory.
|
[
{
"created": "Sun, 18 Jun 2017 15:34:05 GMT",
"version": "v1"
},
{
"created": "Wed, 22 Nov 2017 18:34:01 GMT",
"version": "v2"
}
] |
2017-11-23
|
[
[
"Amoozad",
"Z.",
""
],
[
"Sadeghi",
"J.",
""
]
] |
In this paper, we take the slowly rotating black three-brane background and perturb it by introducing a vector gauge field. We find the components of the gauge field through Maxwell equations and Bianchi identities. Using currents and some ansatz we find Fick's first law at long wavelength regime. An interesting result for this non-trivial supergravity background is that the diffusion constant on the stretched horizon which emerges from Fick's first law is a complex constant. The pure imaginary part of the diffusion constant appears because the black three-brane has angular momentum. By taking the static limit of the corresponding black brane the well known diffusion constant will be recovered. On the other hand, from the point of view of the Fick's second law, we have the dispersion relation $\omega=-iDq^{2}$ and we found a damping of hydrodynamical flow in the holographically dual theory. Existence of imaginary term in the diffusion constant introduces an oscillating propagation of the gauge field in the dual field theory.
|
1708.07198
|
Hong Lu
|
Yue-Zhou Li, Hai-Shan Liu, H. Lu
|
Quasi-Topological Ricci Polynomial Gravities
|
Latex, 56 pages, discussion on shear viscosity revised
| null |
10.1007/JHEP02(2018)166
| null |
hep-th gr-qc
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Quasi-topological terms in gravity can be viewed as those that give no
contribution to the equations of motion for a special subclass of metric
ans\"atze. They therefore play no r\^ole in constructing these solutions, but
can affect the general perturbations. We consider Einstein gravity extended
with Ricci tensor polynomial invariants, which admits Einstein metrics with
appropriate effective cosmological constants as its vacuum solutions. We
construct three types of quasi-topological gravities. The first type is for the
most general static metrics with spherical, toroidal or hyperbolic isometries.
The second type is for the special static metrics where $g_{tt} g_{rr}$ is
constant. The third type is the linearized quasi-topological gravities on the
Einstein metrics. We construct and classify results that are either dependent
on or independent of dimensions, up to the tenth order. We then consider a
subset of these three types and obtain Lovelock-like quasi-topological
gravities, that are independent of the dimensions. The linearized gravities on
Einstein metrics on all dimensions are simply Einstein and hence ghost free.
The theories become quasi-topological on static metrics in one specific
dimension, but non-trivial in others. We also focus on the quasi-topological
Ricci cubic invariant in four dimensions as a specific example to study its
effect on holography, including shear viscosity, thermoelectric DC
conductivities and butterfly velocity. In particular, we find that the
holographic diffusivity bounds can be violated by the quasi-topological terms,
which can induce an extra massive mode that yields a butterfly velocity unbound
above.
|
[
{
"created": "Wed, 23 Aug 2017 21:46:38 GMT",
"version": "v1"
},
{
"created": "Sun, 3 Sep 2017 11:53:10 GMT",
"version": "v2"
},
{
"created": "Thu, 7 Dec 2017 06:32:05 GMT",
"version": "v3"
}
] |
2018-04-04
|
[
[
"Li",
"Yue-Zhou",
""
],
[
"Liu",
"Hai-Shan",
""
],
[
"Lu",
"H.",
""
]
] |
Quasi-topological terms in gravity can be viewed as those that give no contribution to the equations of motion for a special subclass of metric ans\"atze. They therefore play no r\^ole in constructing these solutions, but can affect the general perturbations. We consider Einstein gravity extended with Ricci tensor polynomial invariants, which admits Einstein metrics with appropriate effective cosmological constants as its vacuum solutions. We construct three types of quasi-topological gravities. The first type is for the most general static metrics with spherical, toroidal or hyperbolic isometries. The second type is for the special static metrics where $g_{tt} g_{rr}$ is constant. The third type is the linearized quasi-topological gravities on the Einstein metrics. We construct and classify results that are either dependent on or independent of dimensions, up to the tenth order. We then consider a subset of these three types and obtain Lovelock-like quasi-topological gravities, that are independent of the dimensions. The linearized gravities on Einstein metrics on all dimensions are simply Einstein and hence ghost free. The theories become quasi-topological on static metrics in one specific dimension, but non-trivial in others. We also focus on the quasi-topological Ricci cubic invariant in four dimensions as a specific example to study its effect on holography, including shear viscosity, thermoelectric DC conductivities and butterfly velocity. In particular, we find that the holographic diffusivity bounds can be violated by the quasi-topological terms, which can induce an extra massive mode that yields a butterfly velocity unbound above.
|
1512.04335
|
Masazumi Honda
|
Masazumi Honda
|
Exact relations between M2-brane theories with and without Orientifolds
|
18+11 pages, 5 figures; v5: typos corrected
| null |
10.1007/JHEP06(2016)123
|
WIS/10/15-NOV-DPPA
|
hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study partition functions of low-energy effective theories of M2-branes,
whose type IIB brane constructions include orientifolds. We mainly focus on
circular quiver superconformal Chern-Simons theory on $S^3$, whose gauge group
is $O(2N+1)\times USp(2N)\times \cdots \times O(2N+1)\times USp(2N)$. This
theory is the natural generalization of the $\mathcal{N}=5$ ABJM theory with
the gauge group $O(2N+1)_{2k} \times USp(2N)_{-k}$. We find that the partition
function of this type of theory has a simple relation to the one of the
M2-brane theory without the orientifolds, whose gauge group is $U(N)\times
\cdots \times U(N)$. By using this relation, we determine an exact form of the
grand partition function of the $O(2N+1)_{2} \times USp(2N)_{-1}$ ABJM theory,
where its supersymmetry is expected to be enhanced to $\mathcal{N}=6$. As
another interesting application, we discuss that our result gives a natural
physical interpretation of a relation between the grand partition functions of
the $U(N+1)_4 \times U(N)_{-4}$ ABJ theory and $U(N)_2 \times U(N)_{-2}$ ABJM
theory, recently conjectured by Grassi-Hatsuda-Mari\~no. We also argue that
partition functions of $\hat{A}_3$ quiver theories have representations in
terms of an ideal Fermi gas systems associated with $\hat{D}$-type quiver
theories and this leads an interesting relation between certain $U(N)$ and
$USp(2N)$ supersymmetric gauge theories.
|
[
{
"created": "Mon, 14 Dec 2015 14:28:47 GMT",
"version": "v1"
},
{
"created": "Thu, 28 Jan 2016 11:02:52 GMT",
"version": "v2"
},
{
"created": "Fri, 5 Feb 2016 15:31:02 GMT",
"version": "v3"
},
{
"created": "Fri, 25 Mar 2016 14:22:45 GMT",
"version": "v4"
},
{
"created": "Fri, 13 May 2016 14:29:29 GMT",
"version": "v5"
}
] |
2016-07-20
|
[
[
"Honda",
"Masazumi",
""
]
] |
We study partition functions of low-energy effective theories of M2-branes, whose type IIB brane constructions include orientifolds. We mainly focus on circular quiver superconformal Chern-Simons theory on $S^3$, whose gauge group is $O(2N+1)\times USp(2N)\times \cdots \times O(2N+1)\times USp(2N)$. This theory is the natural generalization of the $\mathcal{N}=5$ ABJM theory with the gauge group $O(2N+1)_{2k} \times USp(2N)_{-k}$. We find that the partition function of this type of theory has a simple relation to the one of the M2-brane theory without the orientifolds, whose gauge group is $U(N)\times \cdots \times U(N)$. By using this relation, we determine an exact form of the grand partition function of the $O(2N+1)_{2} \times USp(2N)_{-1}$ ABJM theory, where its supersymmetry is expected to be enhanced to $\mathcal{N}=6$. As another interesting application, we discuss that our result gives a natural physical interpretation of a relation between the grand partition functions of the $U(N+1)_4 \times U(N)_{-4}$ ABJ theory and $U(N)_2 \times U(N)_{-2}$ ABJM theory, recently conjectured by Grassi-Hatsuda-Mari\~no. We also argue that partition functions of $\hat{A}_3$ quiver theories have representations in terms of an ideal Fermi gas systems associated with $\hat{D}$-type quiver theories and this leads an interesting relation between certain $U(N)$ and $USp(2N)$ supersymmetric gauge theories.
|
hep-ph/0008168
|
Mankiewicz
|
N. Kivel, L. Mankiewicz
|
Power corrections to the process $\gamma\gamma^*\to \pi\pi$ in the
Light-Cone Sum Rules approach
|
20 pages, 6 figures
|
Eur.Phys.J.C18:107-116,2000
|
10.1007/s100520000524
|
TPR-00-12
|
hep-ph
| null |
We applied QCD Light Cone Sum Rules to estimate power corrections to the
helicity-conserving amplitude in the process $\gamma^*\gamma\to \pi\pi$. We
found that above $Q^2 \sim 4$ GeV$^2$ power corrections are numerically small
and the twist-2 part dominates.The amplitude can be reliably calculated in this
region using models of $2 \pi$ distribution amplitudes as an input. We found
that the magnitude of the NLO corrections depends rather strongly on the
normalization of the gluonic distribution amplitude.
|
[
{
"created": "Wed, 16 Aug 2000 15:09:11 GMT",
"version": "v1"
}
] |
2011-09-13
|
[
[
"Kivel",
"N.",
""
],
[
"Mankiewicz",
"L.",
""
]
] |
We applied QCD Light Cone Sum Rules to estimate power corrections to the helicity-conserving amplitude in the process $\gamma^*\gamma\to \pi\pi$. We found that above $Q^2 \sim 4$ GeV$^2$ power corrections are numerically small and the twist-2 part dominates.The amplitude can be reliably calculated in this region using models of $2 \pi$ distribution amplitudes as an input. We found that the magnitude of the NLO corrections depends rather strongly on the normalization of the gluonic distribution amplitude.
|
0905.3473
|
Joseph Manjavidze
|
J.Manjavidze
|
On phase transition signal in VHM inelastic collisions
|
Talk at the 1-st CBM-Russia-JINR Collaboration Meeting, 7 pages, 5
figures
| null | null | null |
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The primary intent is to show that the signal of first order phase transition
may be observed at experiment if and only if the multiplicity is sufficiently
large. We discuss corresponding phenomenology from the point of view of
experiment.
|
[
{
"created": "Thu, 21 May 2009 11:39:07 GMT",
"version": "v1"
}
] |
2009-05-22
|
[
[
"Manjavidze",
"J.",
""
]
] |
The primary intent is to show that the signal of first order phase transition may be observed at experiment if and only if the multiplicity is sufficiently large. We discuss corresponding phenomenology from the point of view of experiment.
|
hep-ph/0103048
|
Kiwoon Choi
|
Kiwoon Choi, Kyuwan Hwang, Sin Kyu Kang, Kang Young Lee, and Wan Young
Song
|
Probing the messenger of supersymmetry breaking by the muon anomalous
magnetic moment
|
RevTeX, 29 pages, 14 eps figures, figure for deflected anomaly
mediation is corrected, reference added
|
Phys.Rev. D64 (2001) 055001
|
10.1103/PhysRevD.64.055001
|
KAIST-TH 01/03, KIAS-P01012
|
hep-ph
| null |
Motivated by the recently measured muon's anomalous magnetic moment
$a_{\mu}$, we examine the supersymmetry contribution to $a_{\mu}$ in various
mediation models of supersymmetry breaking which lead to predictive flavor
conserving soft parameters at high energy scale. The studied models include
dilaton/modulus-mediated models in heterotic string/$M$ theory, gauge-mediated
model, no-scale or gaugino-mediated model, and also the minimal and deflected
anomaly-mediated models. For each model, the range of $a^{SUSY}_{\mu}$ allowed
by other experimental constraints, e.g. b --> s\gamma and the collider bounds
on superparticle masses, is obtained together with the corresponding parameter
region of the model. Gauge-mediated models with low messenger scale can give
any $a^{SUSY}_{\mu}$ within the $2\sigma$ bound. In many other models, b -->
s\gamma favors $a^{SUSY}_{\mu}$ smaller than either the $-1\sigma$ value
($26\times 10^{-10}$) or the central value ($42\times 10^{-10}$).
|
[
{
"created": "Mon, 5 Mar 2001 12:46:07 GMT",
"version": "v1"
},
{
"created": "Thu, 8 Mar 2001 23:36:00 GMT",
"version": "v2"
},
{
"created": "Mon, 19 Mar 2001 06:58:33 GMT",
"version": "v3"
}
] |
2009-11-07
|
[
[
"Choi",
"Kiwoon",
""
],
[
"Hwang",
"Kyuwan",
""
],
[
"Kang",
"Sin Kyu",
""
],
[
"Lee",
"Kang Young",
""
],
[
"Song",
"Wan Young",
""
]
] |
Motivated by the recently measured muon's anomalous magnetic moment $a_{\mu}$, we examine the supersymmetry contribution to $a_{\mu}$ in various mediation models of supersymmetry breaking which lead to predictive flavor conserving soft parameters at high energy scale. The studied models include dilaton/modulus-mediated models in heterotic string/$M$ theory, gauge-mediated model, no-scale or gaugino-mediated model, and also the minimal and deflected anomaly-mediated models. For each model, the range of $a^{SUSY}_{\mu}$ allowed by other experimental constraints, e.g. b --> s\gamma and the collider bounds on superparticle masses, is obtained together with the corresponding parameter region of the model. Gauge-mediated models with low messenger scale can give any $a^{SUSY}_{\mu}$ within the $2\sigma$ bound. In many other models, b --> s\gamma favors $a^{SUSY}_{\mu}$ smaller than either the $-1\sigma$ value ($26\times 10^{-10}$) or the central value ($42\times 10^{-10}$).
|
1801.09534
|
Tri-Nang Pham
|
T. N. Pham
|
A Simple Expression for Heavy to Light Meson Semileptonic Decays Form
Factors
|
v4, published version, Int. J. Mod. Phys. A 33 (2018) 1850160
|
Int. J. Mod. Phys. A 33 (2018) 1850160
|
10.1142/S0217751X18501609
| null |
hep-ph hep-ex
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Like the two-photon and two-gluon decays of the $P$-wave $\chi_{c0,2}$ and
$\chi_{b0,2}$ charmonium state for which the Born term produces a very simple
decgays amplitude in terms of an effective Lagrangian with two-quark local
operator, the Born term for the processes $c\bar{d} \to (\pi,K) \ell \nu $ and
$b \bar{d}\to (\pi, K) \ell\nu $, could also produce the $D$ and $B$ meson
semileptonic decays with the light meson $\pi, K$ in the final state. In this
approach to heavy-light meson form factors with the $\pi$, K meson treated as
Goldstone boson, a simple expression is found for the decays form factors,
given as~: $ f_{+}(0)/(1 -q^{2}/(m_{H}^{2}+ m_{\pi}^{2}))$, with $H=D,B$ for
$D,B \to \pi$ form factors, and $f_{+}(0)/(1 -q^{2}/(m_{H}^{2}+ m_{K}^{2}))$
for $B,D\to K$ form factor. The purpose of this paper is to show that this
expression for the form factors could describe rather well the $q^{2}$-
behaviour observed in the BaBar, Belle and BESIII measurements and lattice
simulation. In particular, the $D\to K$ form factors are in good agreement with
the measured values in the whole range of $q^{2}$ showing evidence for $SU(3)$
breaking with the presence of $m_{K}^{2}$ term in the quark propagator, but
some corrections to the Born term are needed at large $q^{2}$ for $D,B \to \pi$
form factors.
|
[
{
"created": "Mon, 29 Jan 2018 14:47:16 GMT",
"version": "v1"
},
{
"created": "Mon, 14 May 2018 09:42:18 GMT",
"version": "v2"
},
{
"created": "Thu, 20 Sep 2018 12:33:15 GMT",
"version": "v3"
},
{
"created": "Mon, 8 Oct 2018 12:04:19 GMT",
"version": "v4"
}
] |
2018-11-14
|
[
[
"Pham",
"T. N.",
""
]
] |
Like the two-photon and two-gluon decays of the $P$-wave $\chi_{c0,2}$ and $\chi_{b0,2}$ charmonium state for which the Born term produces a very simple decgays amplitude in terms of an effective Lagrangian with two-quark local operator, the Born term for the processes $c\bar{d} \to (\pi,K) \ell \nu $ and $b \bar{d}\to (\pi, K) \ell\nu $, could also produce the $D$ and $B$ meson semileptonic decays with the light meson $\pi, K$ in the final state. In this approach to heavy-light meson form factors with the $\pi$, K meson treated as Goldstone boson, a simple expression is found for the decays form factors, given as~: $ f_{+}(0)/(1 -q^{2}/(m_{H}^{2}+ m_{\pi}^{2}))$, with $H=D,B$ for $D,B \to \pi$ form factors, and $f_{+}(0)/(1 -q^{2}/(m_{H}^{2}+ m_{K}^{2}))$ for $B,D\to K$ form factor. The purpose of this paper is to show that this expression for the form factors could describe rather well the $q^{2}$- behaviour observed in the BaBar, Belle and BESIII measurements and lattice simulation. In particular, the $D\to K$ form factors are in good agreement with the measured values in the whole range of $q^{2}$ showing evidence for $SU(3)$ breaking with the presence of $m_{K}^{2}$ term in the quark propagator, but some corrections to the Born term are needed at large $q^{2}$ for $D,B \to \pi$ form factors.
|
1703.09960
|
Takuya Tatsuishi
|
Tatsuo Kobayashi, Osamu Seto, Takuya H. Tatsuishi
|
Toward pole inflation and attractors in supergravity : Chiral matter
field inflation
|
14 pages, 11 figures
|
Prog Theor Exp Phys (2017)
|
10.1093/ptep/ptx166
|
EPHOU-17-005
|
hep-th astro-ph.CO hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In string-inspired supergravity theory, K\"{a}hler metric of chiral matter
fields often has a pole. Such K\"{a}hler metric is interesting from the
viewpoint of the framework of the pole inflation, where the scalar potential
can be stretched out to be flat around the pole for a canonically normalized
field and inflation can be realized. However, when K\"{a}hler metric has a
pole, the scalar potential can also have a pole at the same point in
supergravity theory. We study such supergravity models with the pole, and
provide numerical analysis of inflationary dynamics and resultant density
perturbation. In contrast with usual pole inflation models, inflation in this
supergravity based model occurs not on the pole but region apart from the pole.
We show that the existence of the pole in the scalar potential is crucial
nevertheless. We also examine attractor behavior of our model.
|
[
{
"created": "Wed, 29 Mar 2017 10:22:49 GMT",
"version": "v1"
},
{
"created": "Wed, 1 Nov 2017 07:56:40 GMT",
"version": "v2"
}
] |
2019-12-06
|
[
[
"Kobayashi",
"Tatsuo",
""
],
[
"Seto",
"Osamu",
""
],
[
"Tatsuishi",
"Takuya H.",
""
]
] |
In string-inspired supergravity theory, K\"{a}hler metric of chiral matter fields often has a pole. Such K\"{a}hler metric is interesting from the viewpoint of the framework of the pole inflation, where the scalar potential can be stretched out to be flat around the pole for a canonically normalized field and inflation can be realized. However, when K\"{a}hler metric has a pole, the scalar potential can also have a pole at the same point in supergravity theory. We study such supergravity models with the pole, and provide numerical analysis of inflationary dynamics and resultant density perturbation. In contrast with usual pole inflation models, inflation in this supergravity based model occurs not on the pole but region apart from the pole. We show that the existence of the pole in the scalar potential is crucial nevertheless. We also examine attractor behavior of our model.
|
2001.04285
|
Aravindhan Srinivasan
|
Subramanya Hegde, Bindusar Sahoo, Aravindhan Srinivasan
|
Relaxed hypermultiplet in four dimensional N=2 conformal supergravity
|
13 pages, References updated, comments added and minor typos
corrected
|
Phys. Rev. D 101, 066012 (2020)
|
10.1103/PhysRevD.101.066012
| null |
hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Superconformal matter multiplets play a crucial role in the construction of
Poincare supergravity invariants. Off-shell multiplets allow for construction
of general matter couplings in supergravity. In Nucl. Phys. B214 (1983)
519-531, relaxed hypermultiplet was constructed in rigid supersymmetry which on
coupling with the real scalar multiplet allowed for an off-shell formulation of
the rigid hypermultiplet. In this paper, we extend the relaxed hypermultiplet
to conformal supergravity. For consistency with the superconformal algebra, we
find that the fields have to be allowed to transform in a non-canonical way
under SU(2) symmetry. We find suitable field redefinitions to obtain fields
which are irreducible representations of SU(2) R-symmetry and present the full
non-linear transformation rule.
|
[
{
"created": "Mon, 13 Jan 2020 14:33:44 GMT",
"version": "v1"
},
{
"created": "Sun, 9 Feb 2020 05:18:00 GMT",
"version": "v2"
}
] |
2020-03-25
|
[
[
"Hegde",
"Subramanya",
""
],
[
"Sahoo",
"Bindusar",
""
],
[
"Srinivasan",
"Aravindhan",
""
]
] |
Superconformal matter multiplets play a crucial role in the construction of Poincare supergravity invariants. Off-shell multiplets allow for construction of general matter couplings in supergravity. In Nucl. Phys. B214 (1983) 519-531, relaxed hypermultiplet was constructed in rigid supersymmetry which on coupling with the real scalar multiplet allowed for an off-shell formulation of the rigid hypermultiplet. In this paper, we extend the relaxed hypermultiplet to conformal supergravity. For consistency with the superconformal algebra, we find that the fields have to be allowed to transform in a non-canonical way under SU(2) symmetry. We find suitable field redefinitions to obtain fields which are irreducible representations of SU(2) R-symmetry and present the full non-linear transformation rule.
|
0904.3360
|
Hiroshi Nunokawa
|
A. M. Gago, H. Minakata, H. Nunokawa, S. Uchinami and R. Zukanovich
Funchal
|
Resolving CP Violation by Standard and Nonstandard Interactions and
Parameter Degeneracy in Neutrino Oscillations
|
43 pages, 28 figures, version accepted for publication in JHEP
|
JHEP 1001:049,2010
|
10.1007/JHEP01(2010)049
| null |
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In neutrino oscillation with non-standard interactions (NSI) the system is
enriched with CP violation caused by phases due to NSI in addition to the
standard lepton Kobayashi-Maskawa phase \delta. In this paper we show that it
is possible to disentangle the two CP violating effects by measurement of muon
neutrino appearance by a near-far two detector setting in neutrino factory
experiments. Prior to the quantitative analysis we investigate in detail the
various features of the neutrino oscillations with NSI, but under the
assumption that only one of the NSI elements, \epsilon_{e \mu} or \epsilon_{e
\tau}, is present. They include synergy between the near and the far detectors,
the characteristic differences between the \epsilon_{e \mu} and
\epsilon_{e\tau} systems, and in particular, the parameter degeneracy. Finally,
we use a concrete setting with the muon energy of 50 GeV and magnetized iron
detectors at two baselines, one at L=3000 km and the other at L=7000 km, each
having a fiducial mass of 50 kton to study the discovery potential of NSI and
its CP violation effects. We demonstrate, by assuming 4 \times 10^{21} useful
muon decays for both polarities, that one can identify non-standard CP
violation down to | epsilon_{e \mu} | \simeq \text{a few} \times 10^{-3}, and |
\epsilon_{e \tau} | \simeq 10^{-2} at 3\sigma CL for \theta_{13} down to \sin^2
2\theta_{13} = 10^{-4} in most of the region of \delta. The impact of the
existence of NSI on the measurement of \delta and the mass hierarchy is also
worked out.
|
[
{
"created": "Tue, 21 Apr 2009 22:53:31 GMT",
"version": "v1"
},
{
"created": "Mon, 4 May 2009 21:29:29 GMT",
"version": "v2"
},
{
"created": "Wed, 23 Dec 2009 20:12:09 GMT",
"version": "v3"
}
] |
2010-01-22
|
[
[
"Gago",
"A. M.",
""
],
[
"Minakata",
"H.",
""
],
[
"Nunokawa",
"H.",
""
],
[
"Uchinami",
"S.",
""
],
[
"Funchal",
"R. Zukanovich",
""
]
] |
In neutrino oscillation with non-standard interactions (NSI) the system is enriched with CP violation caused by phases due to NSI in addition to the standard lepton Kobayashi-Maskawa phase \delta. In this paper we show that it is possible to disentangle the two CP violating effects by measurement of muon neutrino appearance by a near-far two detector setting in neutrino factory experiments. Prior to the quantitative analysis we investigate in detail the various features of the neutrino oscillations with NSI, but under the assumption that only one of the NSI elements, \epsilon_{e \mu} or \epsilon_{e \tau}, is present. They include synergy between the near and the far detectors, the characteristic differences between the \epsilon_{e \mu} and \epsilon_{e\tau} systems, and in particular, the parameter degeneracy. Finally, we use a concrete setting with the muon energy of 50 GeV and magnetized iron detectors at two baselines, one at L=3000 km and the other at L=7000 km, each having a fiducial mass of 50 kton to study the discovery potential of NSI and its CP violation effects. We demonstrate, by assuming 4 \times 10^{21} useful muon decays for both polarities, that one can identify non-standard CP violation down to | epsilon_{e \mu} | \simeq \text{a few} \times 10^{-3}, and | \epsilon_{e \tau} | \simeq 10^{-2} at 3\sigma CL for \theta_{13} down to \sin^2 2\theta_{13} = 10^{-4} in most of the region of \delta. The impact of the existence of NSI on the measurement of \delta and the mass hierarchy is also worked out.
|
0906.5080
|
Adolfo Malbouisson
|
F.C. Khanna, A.P.C. Malbouisson, J.M.C. Malbouisson, A.E. Santana
|
Dimensional renormalizability in compactified spaces
|
20 pages, 2 figures
| null | null | null |
hep-th math-ph math.MP
|
http://creativecommons.org/licenses/by-nc-sa/3.0/
|
We first briefly review some aspects of the techniques of dealing with
ultraviolet divergences in Feynman amplitudes in an Euclidian $D$-dimensional
space-time. Next we consider compactification of a $d$-dimensional ($d\leq D$)
subspace. This includes effects of temperature and of compactification of $d-1$
spatial coordinates. Then we show how dimensional renormalization can be
implemented for a field theory defined on this Euclidian space-time with a
compactified subspace.
|
[
{
"created": "Sat, 27 Jun 2009 13:26:39 GMT",
"version": "v1"
}
] |
2009-10-15
|
[
[
"Khanna",
"F. C.",
""
],
[
"Malbouisson",
"A. P. C.",
""
],
[
"Malbouisson",
"J. M. C.",
""
],
[
"Santana",
"A. E.",
""
]
] |
We first briefly review some aspects of the techniques of dealing with ultraviolet divergences in Feynman amplitudes in an Euclidian $D$-dimensional space-time. Next we consider compactification of a $d$-dimensional ($d\leq D$) subspace. This includes effects of temperature and of compactification of $d-1$ spatial coordinates. Then we show how dimensional renormalization can be implemented for a field theory defined on this Euclidian space-time with a compactified subspace.
|
1005.4347
|
Krzysztof Turzynski
|
Sera Cremonini, Zygmunt Lalak and Krzysztof Turzynski
|
On Non-Canonical Kinetic Terms and the Tilt of the Power Spectrum
|
typos corrected, discussion slightly modified, matches published
version
|
Phys.Rev.D82:047301,2010
|
10.1103/PhysRevD.82.047301
|
IFT-10-04, DAMTP-2010-41, MIFPA-10-20
|
hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We argue that in models of inflation with two scalar fields and non-canonical
kinetic terms there is a possibility of obtaining a red tilt of the power
spectrum of curvature perturbations from noncanonicality-induced interactions
between the curvature and isocurvature perturbations. We describe an extremely
simple model realizing this idea, study numerically its predictions for the
perturbations and discuss applications in realistic scenarios of inflation. We
discuss to what extent in this model the scale of the inflationary potential
can be decoupled from the amplitude of the density fluctuations.
|
[
{
"created": "Mon, 24 May 2010 15:04:50 GMT",
"version": "v1"
},
{
"created": "Sat, 24 Jul 2010 22:00:40 GMT",
"version": "v2"
}
] |
2015-03-17
|
[
[
"Cremonini",
"Sera",
""
],
[
"Lalak",
"Zygmunt",
""
],
[
"Turzynski",
"Krzysztof",
""
]
] |
We argue that in models of inflation with two scalar fields and non-canonical kinetic terms there is a possibility of obtaining a red tilt of the power spectrum of curvature perturbations from noncanonicality-induced interactions between the curvature and isocurvature perturbations. We describe an extremely simple model realizing this idea, study numerically its predictions for the perturbations and discuss applications in realistic scenarios of inflation. We discuss to what extent in this model the scale of the inflationary potential can be decoupled from the amplitude of the density fluctuations.
|
hep-ph/9501338
|
Stephan
|
S.Titard and F.J Yndurain
|
The $l=1$ Hyperfine Splitting in Bottomium as a Precise Probe of the QCD
Vacuum.
|
12 pages, 2 postscript figures, typeset with ReVTeX
|
Phys.Lett. B351 (1995) 541-545
|
10.1016/0370-2693(95)00429-O
|
FTUAM 94-34
|
hep-ph
| null |
By relating fine and hyperfine spittings for l=1 states in bottomium we can
factor out the less tractable part of the perturbative and nonperturbative
effects. Reliable predictions for one of the fine splittings and the hyperfine
splitting can then be made calculating in terms of the remaining fine
splitting, which is then taken from experiment; perturbative and
nonperturbative corrections to these relations are under full control. The
method (which produces reasonable results even for the $c{\bar c}$ system)
predicts a value of 1.5 MeV for the $(s=1)-(s=0)$ splitting in $b{\bar b}$,
opposite in sign to that in $c{\bar c}$. For this result the contribution of
the gluon condensate $<\alpha_s G^2>$ is essential, as any model (in particular
potential models) which neglects this would give a negative $b{\bar b}$
hyperfine splitting.
|
[
{
"created": "Wed, 18 Jan 1995 22:50:04 GMT",
"version": "v1"
}
] |
2016-09-01
|
[
[
"Titard",
"S.",
""
],
[
"Yndurain",
"F. J",
""
]
] |
By relating fine and hyperfine spittings for l=1 states in bottomium we can factor out the less tractable part of the perturbative and nonperturbative effects. Reliable predictions for one of the fine splittings and the hyperfine splitting can then be made calculating in terms of the remaining fine splitting, which is then taken from experiment; perturbative and nonperturbative corrections to these relations are under full control. The method (which produces reasonable results even for the $c{\bar c}$ system) predicts a value of 1.5 MeV for the $(s=1)-(s=0)$ splitting in $b{\bar b}$, opposite in sign to that in $c{\bar c}$. For this result the contribution of the gluon condensate $<\alpha_s G^2>$ is essential, as any model (in particular potential models) which neglects this would give a negative $b{\bar b}$ hyperfine splitting.
|
1104.5624
|
Cristina Manuel
|
Robert Bierkandt and Cristina Manuel
|
Bulk viscosity coefficients due to phonons and kaons in superfluid
color-flavor locked quark matter
|
13 pages, 6 figures; Explanations and one reference added; version to
be published in Phys. Rev. D
|
Phys.Rev.D84:023004,2011
|
10.1103/PhysRevD.84.023004
| null |
hep-ph astro-ph.HE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We evaluate the three bulk viscosity coefficients $\zeta_1, \zeta_2$ and
$\zeta_3$ in the color-flavor locked (CFL) superfluid phase due to phonons and
kaons, which are the lightest modes in that system. We first show that the
computation is rather analogous to the computation of the same coefficients in
superfluid $^4$He, as due to phonons and rotons. For astrophysical
applications, we also find the value of the viscosities when there is a
periodic disturbance, and the viscosities also depend on the frequency of the
disturbance.
In a temperature regime that might be of astrophysical relevance, we find
that the contributions of both the phonons and kaons should be considered, and
that $\zeta_2$ is much less that the same coefficient in unpaired quark matter
|
[
{
"created": "Fri, 29 Apr 2011 13:27:43 GMT",
"version": "v1"
},
{
"created": "Tue, 28 Jun 2011 10:45:01 GMT",
"version": "v2"
}
] |
2011-08-08
|
[
[
"Bierkandt",
"Robert",
""
],
[
"Manuel",
"Cristina",
""
]
] |
We evaluate the three bulk viscosity coefficients $\zeta_1, \zeta_2$ and $\zeta_3$ in the color-flavor locked (CFL) superfluid phase due to phonons and kaons, which are the lightest modes in that system. We first show that the computation is rather analogous to the computation of the same coefficients in superfluid $^4$He, as due to phonons and rotons. For astrophysical applications, we also find the value of the viscosities when there is a periodic disturbance, and the viscosities also depend on the frequency of the disturbance. In a temperature regime that might be of astrophysical relevance, we find that the contributions of both the phonons and kaons should be considered, and that $\zeta_2$ is much less that the same coefficient in unpaired quark matter
|
hep-th/0005241
|
Hossein Amir Fathollahi
|
Amir H. Fatollahi
|
D0-Branes As Confined Quarks
|
12 pages, 4 eps figures, LaTeX; Talk presented at Isfahan String
Workshop 2000, May 13-14, IRAN
| null | null | null |
hep-th
| null |
The possibility of using the quantum mechanics of D0-branes for the
bound-states of quarks and QCD strings is investigated. Issues such as the
inter D0-branes potential, the whiteness of the D0-branes bound-states and the
large-N limit of D0-branes effective theory are studied. A possible role of the
non-commutativity of relative distances of D0-branes in a study of ordinary QCD
is discussed.
|
[
{
"created": "Thu, 25 May 2000 14:27:20 GMT",
"version": "v1"
},
{
"created": "Mon, 5 Jun 2000 13:34:57 GMT",
"version": "v2"
}
] |
2007-05-23
|
[
[
"Fatollahi",
"Amir H.",
""
]
] |
The possibility of using the quantum mechanics of D0-branes for the bound-states of quarks and QCD strings is investigated. Issues such as the inter D0-branes potential, the whiteness of the D0-branes bound-states and the large-N limit of D0-branes effective theory are studied. A possible role of the non-commutativity of relative distances of D0-branes in a study of ordinary QCD is discussed.
|
1711.06789
|
Sergei V. Ketov
|
Yermek Aldabergenov and Sergei V. Ketov
|
Removing instability of Polonyi-Starobinsky supergravity by adding FI
term
|
8 pages, LaTeX; major revision of Sec.3, references added
| null |
10.1142/S0217732318500323
|
IPMU17-0141
|
hep-th gr-qc
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Polonyi-Starobinsky (PS) supergravity is the N=1 supergravity model of
Starobinsky inflation with spontaneous supersymmetry breaking (after inflation)
due to Polonyi superfield, and inflaton belonging to a massive vector
supermultiplet. The PS model is used for an explicit realization of the
(super-heavy) gravitino dark matter scenario in cosmology. We find a potential
instability in this model, and offer a mechanism for its removal by adding a
Fayet-Iliopoulos (FI) term.
|
[
{
"created": "Sat, 18 Nov 2017 01:42:54 GMT",
"version": "v1"
},
{
"created": "Thu, 23 Nov 2017 00:36:05 GMT",
"version": "v2"
},
{
"created": "Tue, 9 Jan 2018 07:02:07 GMT",
"version": "v3"
},
{
"created": "Thu, 25 Jan 2018 06:26:21 GMT",
"version": "v4"
}
] |
2018-03-14
|
[
[
"Aldabergenov",
"Yermek",
""
],
[
"Ketov",
"Sergei V.",
""
]
] |
Polonyi-Starobinsky (PS) supergravity is the N=1 supergravity model of Starobinsky inflation with spontaneous supersymmetry breaking (after inflation) due to Polonyi superfield, and inflaton belonging to a massive vector supermultiplet. The PS model is used for an explicit realization of the (super-heavy) gravitino dark matter scenario in cosmology. We find a potential instability in this model, and offer a mechanism for its removal by adding a Fayet-Iliopoulos (FI) term.
|
hep-th/0304059
|
Pascal Grange
|
Pascal Grange
|
Modified Star-Products Beyond the Large-B Limit
|
9 pages; references added; a few clarifications and a consistency
check added, version to appear in Phys. Lett. B
|
Phys.Lett. B586 (2004) 125-132
|
10.1016/j.physletb.2004.02.043
| null |
hep-th
| null |
Derivative corrections to the Wess--Zumino couplings of open-string effective
actions are computed at all orders in derivatives, taking the open-string
metric into account. This leads to a set of deformed star-products beyond the
Seiberg--Witten limit, and allows to reinterpret the couplings in terms of a
deformed integration prescription along a Wilson line in the non-commutative
set-up. Moreover, the recursive definition of the star-products induces
deformations of U(1) non-commutative Yang--Mills theory.
|
[
{
"created": "Mon, 7 Apr 2003 17:06:10 GMT",
"version": "v1"
},
{
"created": "Wed, 9 Apr 2003 12:01:44 GMT",
"version": "v2"
},
{
"created": "Tue, 16 Mar 2004 10:25:33 GMT",
"version": "v3"
}
] |
2010-04-05
|
[
[
"Grange",
"Pascal",
""
]
] |
Derivative corrections to the Wess--Zumino couplings of open-string effective actions are computed at all orders in derivatives, taking the open-string metric into account. This leads to a set of deformed star-products beyond the Seiberg--Witten limit, and allows to reinterpret the couplings in terms of a deformed integration prescription along a Wilson line in the non-commutative set-up. Moreover, the recursive definition of the star-products induces deformations of U(1) non-commutative Yang--Mills theory.
|
1907.02541
|
Manibrata Sen
|
Andr\'e de Gouv\^ea, Wei-Chih Huang, Johannes K\"onig, Manibrata Sen
|
Accessible Lepton-Number-Violating Models and Negligible Neutrino Masses
|
26 pages, 11 figures, 1 appendix. Matches published version
|
Phys. Rev. D 100, 075033 (2019)
|
10.1103/PhysRevD.100.075033
|
NUHEP-TH/19-07, CP3-Origins-2019-027 DNRF90
|
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Lepton-number violation (LNV), in general, implies nonzero Majorana masses
for the Standard Model neutrinos. Since neutrino masses are very small, for
generic candidate models of the physics responsible for LNV, the rates for
almost all experimentally accessible LNV observables -- except for neutrinoless
double-beta decay -- are expected to be exceedingly small. Guided by
effective-operator considerations of LNV phenomena, we identify a complete
family of models where lepton number is violated but the generated Majorana
neutrino masses are tiny, even if the new-physics scale is below 1 TeV. We
explore the phenomenology of these models, including charged-lepton
flavor-violating phenomena and baryon-number-violating phenomena, identifying
scenarios where the allowed rates for $\mu^-\to e^+$-conversion in nuclei are
potentially accessible to next-generation experiments.
|
[
{
"created": "Thu, 4 Jul 2019 18:00:05 GMT",
"version": "v1"
},
{
"created": "Thu, 17 Oct 2019 00:28:48 GMT",
"version": "v2"
}
] |
2019-10-30
|
[
[
"de Gouvêa",
"André",
""
],
[
"Huang",
"Wei-Chih",
""
],
[
"König",
"Johannes",
""
],
[
"Sen",
"Manibrata",
""
]
] |
Lepton-number violation (LNV), in general, implies nonzero Majorana masses for the Standard Model neutrinos. Since neutrino masses are very small, for generic candidate models of the physics responsible for LNV, the rates for almost all experimentally accessible LNV observables -- except for neutrinoless double-beta decay -- are expected to be exceedingly small. Guided by effective-operator considerations of LNV phenomena, we identify a complete family of models where lepton number is violated but the generated Majorana neutrino masses are tiny, even if the new-physics scale is below 1 TeV. We explore the phenomenology of these models, including charged-lepton flavor-violating phenomena and baryon-number-violating phenomena, identifying scenarios where the allowed rates for $\mu^-\to e^+$-conversion in nuclei are potentially accessible to next-generation experiments.
|
hep-th/9611068
|
Valeri Dvoeglazov
|
Valeri V. Dvoeglazov (Universidad Autonoma de Zacatecas)
|
Questions in the Theory of the (1,0)+(0,1) Quantized Fields
|
ReVTeX file, 21pp., no figures
|
Int.J.Theor.Phys.37:1915-1944,1998
|
10.1023/A:1026665230089
|
EFUAZ FT-96-31
|
hep-th
| null |
We find a mapping between antisymmetric tensor matter fields and the
Weinberg's 2(2j+1)- component "bispinor" fields. Equations which describe the
j=1 antisymmetric tensor field coincide with the Hammer-Tucker equations
entirely and with the Weinberg ones within a subsidiary condition, the
Klein-Gordon equation. The new Lagrangian for the Weinberg theory is proposed
which is scalar and Hermitian. It is built on the basis of the concept of the
`Weinberg doubles'. Origins of a contradiction between the classical theory,
the Weinberg theorem B-A=\lambda for quantum relativistic fields and the
claimed `longitudity' of the antisymmetric tensor field (transformed on the
(1,0)\oplus (0,1) Lorentz group representation) after quantization are
clarified. Analogs of the j=1/2 Feynman-Dyson propagator are presented in the
framework of the j=1 Weinberg theory. It is then shown that under the definite
choice of field functions and initial and boundary conditions the massless j=1
Weinberg-Tucker-Hammer equations contain all information that the Maxwell
equations for electromagnetic field have. Thus, the former appear to be of use
in describing some physical processes for which that could be necessitated or
be convenient.
|
[
{
"created": "Mon, 11 Nov 1996 05:49:29 GMT",
"version": "v1"
},
{
"created": "Tue, 7 Oct 1997 21:04:03 GMT",
"version": "v2"
}
] |
2014-11-18
|
[
[
"Dvoeglazov",
"Valeri V.",
"",
"Universidad Autonoma de Zacatecas"
]
] |
We find a mapping between antisymmetric tensor matter fields and the Weinberg's 2(2j+1)- component "bispinor" fields. Equations which describe the j=1 antisymmetric tensor field coincide with the Hammer-Tucker equations entirely and with the Weinberg ones within a subsidiary condition, the Klein-Gordon equation. The new Lagrangian for the Weinberg theory is proposed which is scalar and Hermitian. It is built on the basis of the concept of the `Weinberg doubles'. Origins of a contradiction between the classical theory, the Weinberg theorem B-A=\lambda for quantum relativistic fields and the claimed `longitudity' of the antisymmetric tensor field (transformed on the (1,0)\oplus (0,1) Lorentz group representation) after quantization are clarified. Analogs of the j=1/2 Feynman-Dyson propagator are presented in the framework of the j=1 Weinberg theory. It is then shown that under the definite choice of field functions and initial and boundary conditions the massless j=1 Weinberg-Tucker-Hammer equations contain all information that the Maxwell equations for electromagnetic field have. Thus, the former appear to be of use in describing some physical processes for which that could be necessitated or be convenient.
|
2312.01096
|
Stefan Hollands
|
Stefan Hollands and Robert M. Wald
|
The Operator Product Expansion in Quantum Field Theory
|
20pp; article prepared for Encyclopedia of Mathematical Physics
| null | null | null |
hep-th gr-qc math-ph math.MP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Operator product expansions (OPEs) in quantum field theory (QFT) provide an
asymptotic relation between products of local fields defined at points $x_1,
\dots, x_n$ and local fields at point $y$ in the limit $x_1, \dots, x_n \to y$.
They thereby capture in a precise way the singular behavior of products of
quantum fields at a point as well as their ``finite trends.'' In this article,
we shall review the fundamental properties of OPEs and their role in the
formulation of interacting QFT in curved spacetime, the ``flow relations'' in
coupling parameters satisfied by the OPE coefficients, the role of OPEs in
conformal field theories, and the manner in which general theorems --
specifically, the PCT theorem -- can be formulated using OPEs in a curved
spacetime setting.
|
[
{
"created": "Sat, 2 Dec 2023 09:57:14 GMT",
"version": "v1"
}
] |
2023-12-05
|
[
[
"Hollands",
"Stefan",
""
],
[
"Wald",
"Robert M.",
""
]
] |
Operator product expansions (OPEs) in quantum field theory (QFT) provide an asymptotic relation between products of local fields defined at points $x_1, \dots, x_n$ and local fields at point $y$ in the limit $x_1, \dots, x_n \to y$. They thereby capture in a precise way the singular behavior of products of quantum fields at a point as well as their ``finite trends.'' In this article, we shall review the fundamental properties of OPEs and their role in the formulation of interacting QFT in curved spacetime, the ``flow relations'' in coupling parameters satisfied by the OPE coefficients, the role of OPEs in conformal field theories, and the manner in which general theorems -- specifically, the PCT theorem -- can be formulated using OPEs in a curved spacetime setting.
|
hep-th/9508113
|
Taichi Itoh
|
Taichi Itoh and Toshiro Sato
|
Charge Condensation in QED$_3$ with a Chern-Simons Term
|
13 pages, phyzzx, 2 figures
|
Phys.Lett. B367 (1996) 290-298
|
10.1016/0370-2693(95)01445-4
|
DPNU-95-26
|
hep-th cond-mat hep-ph
| null |
Introducing a chemical potential in the functional method, we construct the
effective action of QED$_3$ with a Chern-Simons term. We examine a possibility
that charge condensation $\langle\psi^\dagger\psi \rangle$ remains nonzero at
the limit of the zero chemical potential. If it happens, spontaneous
magnetization occurs due to the Gauss' law constraint which connects the charge
condensation to the background magnetic field. It is found that the stable
vacuum with nonzero charge condensation is realized only when fermion masses
are sent to zero, keeping it lower than the chemical potential. This result
suggests that the spontaneous magnetization is closely related to the fermion
mass.
|
[
{
"created": "Wed, 23 Aug 1995 15:16:39 GMT",
"version": "v1"
}
] |
2009-10-28
|
[
[
"Itoh",
"Taichi",
""
],
[
"Sato",
"Toshiro",
""
]
] |
Introducing a chemical potential in the functional method, we construct the effective action of QED$_3$ with a Chern-Simons term. We examine a possibility that charge condensation $\langle\psi^\dagger\psi \rangle$ remains nonzero at the limit of the zero chemical potential. If it happens, spontaneous magnetization occurs due to the Gauss' law constraint which connects the charge condensation to the background magnetic field. It is found that the stable vacuum with nonzero charge condensation is realized only when fermion masses are sent to zero, keeping it lower than the chemical potential. This result suggests that the spontaneous magnetization is closely related to the fermion mass.
|
2311.14996
|
Holger Frits Bech Nielsen
|
H.B. Nielsen (Niels Bohr Institut) and Colin D. Froggatt (Glasgow
University)
|
Our Dark Matter Stopping in the Earth
|
26th Work Shop " What comes beyond the Standard Models'' in Bled.
July 10. to 19
| null | null | null |
hep-ph astro-ph.HE
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We have worked for some time on a model for dark matter, in which dark matter
consists of small bubbles of a new speculated type of vacuum, which are pumped
up by some ordinary matter such as diamond, so as to resist the pressure of the
domain wall separating the two vacua. Here we put forward thoughts on, how such
macroscopic pearls would have their surrounding dust cleaned off passing
through the atmosphere and the Earth, and what their distribution would be as a
function of the depth of their stopping point and the distribution of the
radiation emitted from them. In our model we assume that they radiate 3.5 keV
electrons and photons, after having been excited during their passage into the
Earth. The purpose of such an estimation of the radiation distribution is to
explain the truly mysterious fact that, among all the underground experiments
seeking dark matter colliding with the Earth material, only the DAMA-LIBRA
experiment has seen any evidence of dark matter. This is an experiment based on
solid NaI scintillators and is rather deep at 1400 m. It is our point that we
can arrange the main radiation to appear in the relatively deep DAMA- LIBRA
site, and explain that the dark matter pearls cannot stop in a fluid, such as
xenon in the xenon based experiments.
|
[
{
"created": "Sat, 25 Nov 2023 10:58:01 GMT",
"version": "v1"
}
] |
2023-11-28
|
[
[
"Nielsen",
"H. B.",
"",
"Niels Bohr Institut"
],
[
"Froggatt",
"Colin D.",
"",
"Glasgow\n University"
]
] |
We have worked for some time on a model for dark matter, in which dark matter consists of small bubbles of a new speculated type of vacuum, which are pumped up by some ordinary matter such as diamond, so as to resist the pressure of the domain wall separating the two vacua. Here we put forward thoughts on, how such macroscopic pearls would have their surrounding dust cleaned off passing through the atmosphere and the Earth, and what their distribution would be as a function of the depth of their stopping point and the distribution of the radiation emitted from them. In our model we assume that they radiate 3.5 keV electrons and photons, after having been excited during their passage into the Earth. The purpose of such an estimation of the radiation distribution is to explain the truly mysterious fact that, among all the underground experiments seeking dark matter colliding with the Earth material, only the DAMA-LIBRA experiment has seen any evidence of dark matter. This is an experiment based on solid NaI scintillators and is rather deep at 1400 m. It is our point that we can arrange the main radiation to appear in the relatively deep DAMA- LIBRA site, and explain that the dark matter pearls cannot stop in a fluid, such as xenon in the xenon based experiments.
|
1803.04027
|
Aaron Held
|
Astrid Eichhorn and Aaron Held
|
Mass difference for charged quarks from asymptotically safe quantum
gravity
|
comments added; version identical with published one
|
Phys. Rev. Lett. 121, 151302 (2018)
|
10.1103/PhysRevLett.121.151302
| null |
hep-th gr-qc hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We propose a scenario to retrodict the top and bottom mass and the Abelian
gauge coupling from first principles in a microscopic model including quantum
gravity. In our approximation, antiscreening quantum-gravity fluctuations
induce an asymptotically safe fixed point for the Abelian hypercharge leading
to a uniquely fixed infrared value that is observationally viable for a
particular choice of microscopic gravitational parameters. The unequal quantum
numbers of the top and bottom quark lead to different fixed-point values for
the top and bottom Yukawa under the impact of gauge and gravity fluctuations.
This results in a dynamically generated mass difference between the two quarks.
To work quantitatively, the preferred ratio of electric charges of bottom and
top in our approximation lies in close vicinity to the Standard-Model value of
$Q_b/Q_t =-1/2$.
|
[
{
"created": "Sun, 11 Mar 2018 19:41:56 GMT",
"version": "v1"
},
{
"created": "Tue, 23 Oct 2018 18:00:02 GMT",
"version": "v2"
}
] |
2018-10-25
|
[
[
"Eichhorn",
"Astrid",
""
],
[
"Held",
"Aaron",
""
]
] |
We propose a scenario to retrodict the top and bottom mass and the Abelian gauge coupling from first principles in a microscopic model including quantum gravity. In our approximation, antiscreening quantum-gravity fluctuations induce an asymptotically safe fixed point for the Abelian hypercharge leading to a uniquely fixed infrared value that is observationally viable for a particular choice of microscopic gravitational parameters. The unequal quantum numbers of the top and bottom quark lead to different fixed-point values for the top and bottom Yukawa under the impact of gauge and gravity fluctuations. This results in a dynamically generated mass difference between the two quarks. To work quantitatively, the preferred ratio of electric charges of bottom and top in our approximation lies in close vicinity to the Standard-Model value of $Q_b/Q_t =-1/2$.
|
hep-ph/0311307
|
Ilya Lvovich Shapiro
|
Ilya L. Shapiro
|
An Overview of the Anomaly-Induced Inflation
|
Talk presented at IRGA2003 (Renormalization Group and Anomalies in
Gravitation and Cosmology, Ouro Preto, Brazil, 16-23 March, 2003)
| null |
10.1016/S0920-5632(03)02431-9
| null |
hep-ph
| null |
The anomaly-induced inflation (modified Starobinsky model) is based on the
application of the effective quantum field theory approach to the Early
Universe. We present a brief general review of this model with a special
attention to the existing difficulties and unsolved problems.
|
[
{
"created": "Mon, 24 Nov 2003 17:50:39 GMT",
"version": "v1"
}
] |
2009-11-10
|
[
[
"Shapiro",
"Ilya L.",
""
]
] |
The anomaly-induced inflation (modified Starobinsky model) is based on the application of the effective quantum field theory approach to the Early Universe. We present a brief general review of this model with a special attention to the existing difficulties and unsolved problems.
|
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