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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1103.1627
|
Fabrizio Nesti
|
Miha Nemevsek, Fabrizio Nesti, Goran Senjanovi\'c, Yue Zhang
|
First Limits on Left-Right Symmetry Scale from LHC Data
|
4 pages, added references
|
Phys.Rev.D83:115014,2011
|
10.1103/PhysRevD.83.115014
| null |
hep-ph hep-ex
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We use the early Large Hadron Collider data to set the lower limit on the
scale of Left-Right symmetry, by searching for the right-handed charged gauge
boson $W_R$ via the final state with two leptons and two jets, for 33/pb
integrated luminosity and 7 TeV center-of-mass energy. In the absence of a
signal beyond the Standard Model background, we set the bound M_WR > 1.4 TeV at
95% C.L.. This result is obtained for a range of right-handed neutrino masses
of the order of few 100 GeV, assuming no accidental cancelation in right-handed
lepton mixings.
|
[
{
"created": "Tue, 8 Mar 2011 20:56:04 GMT",
"version": "v1"
},
{
"created": "Mon, 28 Mar 2011 19:47:56 GMT",
"version": "v2"
}
] |
2011-06-28
|
[
[
"Nemevsek",
"Miha",
""
],
[
"Nesti",
"Fabrizio",
""
],
[
"Senjanović",
"Goran",
""
],
[
"Zhang",
"Yue",
""
]
] |
We use the early Large Hadron Collider data to set the lower limit on the scale of Left-Right symmetry, by searching for the right-handed charged gauge boson $W_R$ via the final state with two leptons and two jets, for 33/pb integrated luminosity and 7 TeV center-of-mass energy. In the absence of a signal beyond the Standard Model background, we set the bound M_WR > 1.4 TeV at 95% C.L.. This result is obtained for a range of right-handed neutrino masses of the order of few 100 GeV, assuming no accidental cancelation in right-handed lepton mixings.
|
1706.05192
|
Romanczukiewicz Tomasz Ph.D.
|
Tomasz Roma\'nczukiewicz
|
Could the primordial radiation be responsible for vanishing of
topological defects?
|
5 pages, 3 figures, additional 3 movies (simulations)
| null |
10.1016/j.physletb.2017.08.045
| null |
hep-th math-ph math.MP
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study the motion of topological defects in 1+1 and 2+1 d relativistic
$\phi^6$ model with three equal vacua in the presence of radiation. We show
that even small fluctuations can trigger a chain reaction leading to vanishing
of topological defects. Only one vacuum remains stable and domains containing
other vacua vanish. We explain this phenomenon in terms of radiation pressure
(both positive and negative). We construct an effective model which translates
the fluctuations into additional term in the field theory potential. In case of
two dimensional model we find a relation between the critical size of the bulk
and amplitude of the perturbation.
|
[
{
"created": "Fri, 16 Jun 2017 09:22:21 GMT",
"version": "v1"
}
] |
2017-11-22
|
[
[
"Romańczukiewicz",
"Tomasz",
""
]
] |
We study the motion of topological defects in 1+1 and 2+1 d relativistic $\phi^6$ model with three equal vacua in the presence of radiation. We show that even small fluctuations can trigger a chain reaction leading to vanishing of topological defects. Only one vacuum remains stable and domains containing other vacua vanish. We explain this phenomenon in terms of radiation pressure (both positive and negative). We construct an effective model which translates the fluctuations into additional term in the field theory potential. In case of two dimensional model we find a relation between the critical size of the bulk and amplitude of the perturbation.
|
hep-th/0201161
|
Harald Dorn
|
Harald Dorn (Humboldt Univ. Berlin)
|
Gauge invariant operators in field theories on non-commutative spaces
|
7 pages, Latex, to appear in the Proceedings of the RTN meeting ``The
Quantum Structure of Spacetime and the Geometric Nature of Fundamental
Interactions'', Corfu, September 13-20, 2001
|
Fortsch.Phys. 50 (2002) 884-889
|
10.1002/1521-3978(200209)50:8/9<884::AID-PROP884>3.0.CO;2-B
|
HU Berlin-EP-02/02
|
hep-th
| null |
We review some selected aspects of the construction of gauge invariant
operators in field theories on non-commutative spaces and their relation to the
energy momentum tensor as well as to the non-commutative loop equations.
|
[
{
"created": "Mon, 21 Jan 2002 16:17:51 GMT",
"version": "v1"
}
] |
2015-06-26
|
[
[
"Dorn",
"Harald",
"",
"Humboldt Univ. Berlin"
]
] |
We review some selected aspects of the construction of gauge invariant operators in field theories on non-commutative spaces and their relation to the energy momentum tensor as well as to the non-commutative loop equations.
|
1505.02413
|
Zurab Kakushadze
|
Zura Kakushadze
|
Quantization Rules for Dynamical Systems
|
5 pages; two misprints corrected
|
Ukrainian Journal of Physics 61(2) (2016) 95-97
| null | null |
hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We discuss a manifestly covariant way of arriving at the quantization rules
based on causality, with no reference to Poisson or Peierls brackets of any
kind.
|
[
{
"created": "Sun, 10 May 2015 17:53:24 GMT",
"version": "v1"
},
{
"created": "Thu, 19 Nov 2015 07:20:42 GMT",
"version": "v2"
}
] |
2016-02-24
|
[
[
"Kakushadze",
"Zura",
""
]
] |
We discuss a manifestly covariant way of arriving at the quantization rules based on causality, with no reference to Poisson or Peierls brackets of any kind.
|
1810.12063
|
Saeid Paktinat Mehdiabadi
|
Majid Azizi, Ali Khorramian, Hamed Abdolmaleki, Saeid Paktinat
Mehdiabadi
|
Impact of the top quark cross section data on parton distribution
functions
|
22 pages, 9 figures, 4 tables
|
Int.J.Mod.Phys. A33, 1850142 (2018)
|
10.1142/S0217751X18501427
| null |
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Recent measurements of top quark pair production cross section, which is
performed at the LHC and the Tevatron collider, are studied using Hessian
profiling technique to obtain their impact on the parton distribution functions
(PDFs). The top quark production data covers different center-of-mass energies
$\sqrt{s}$= 1.96, 5.02, 7, 8 and 13 TeV in either $pp$ or $p\bar{p}$
collisions. It is explained how the Hessian profiling method may be used to
assess the impact of these new data on PDFs and consequently on their
predictions. In this research, the impact of recent measurements of top quark
pair cross sections on different CT14, MMHT2014, and NNPDF3.0 PDF sets is
investigated. The analysis results show that the recent top quark production at
the LHC and Tevatron data provide significant constraints in particular on the
central value, relative uncertainties or both for the $s$-quark distribution
and the gluon PDFs in both of CT14, MMHT2014 PDF sets and are insensitive to
valence quark PDFs. A small constraint on the $\bar u$- sea quark distribution
for CT14 PDF is also observed. There is no impact on the NNPDF3.0 PDF set in
presence of these data.
|
[
{
"created": "Mon, 29 Oct 2018 11:40:41 GMT",
"version": "v1"
},
{
"created": "Sun, 4 Nov 2018 12:07:53 GMT",
"version": "v2"
}
] |
2018-11-06
|
[
[
"Azizi",
"Majid",
""
],
[
"Khorramian",
"Ali",
""
],
[
"Abdolmaleki",
"Hamed",
""
],
[
"Mehdiabadi",
"Saeid Paktinat",
""
]
] |
Recent measurements of top quark pair production cross section, which is performed at the LHC and the Tevatron collider, are studied using Hessian profiling technique to obtain their impact on the parton distribution functions (PDFs). The top quark production data covers different center-of-mass energies $\sqrt{s}$= 1.96, 5.02, 7, 8 and 13 TeV in either $pp$ or $p\bar{p}$ collisions. It is explained how the Hessian profiling method may be used to assess the impact of these new data on PDFs and consequently on their predictions. In this research, the impact of recent measurements of top quark pair cross sections on different CT14, MMHT2014, and NNPDF3.0 PDF sets is investigated. The analysis results show that the recent top quark production at the LHC and Tevatron data provide significant constraints in particular on the central value, relative uncertainties or both for the $s$-quark distribution and the gluon PDFs in both of CT14, MMHT2014 PDF sets and are insensitive to valence quark PDFs. A small constraint on the $\bar u$- sea quark distribution for CT14 PDF is also observed. There is no impact on the NNPDF3.0 PDF set in presence of these data.
|
hep-th/9810132
|
Emanuel Diaconescu
|
Duiliu-Emanuel Diaconescu, Jaume Gomis
|
Neveu-Schwarz Five-Branes at Orbifold Singularities and Holography
|
20 pages, harvmac. Modified description of the world-sheet CFT as
explained in note added. Operator matching extended to arbitrary n.
References and acknowledgment added
|
Nucl.Phys. B548 (1999) 258-274
|
10.1016/S0550-3213(99)80003-0
|
IASSNS-HEP-98/86, RU-98-44, SU-ITP-98-56
|
hep-th
| null |
We consider Type IIB Neveu-Schwarz five-branes transverse to C^2/Z_n
orbifolds and conjecture that string theory on the near horizon geometry is
dual to the decoupled theory on the branes. We analyze the conformal field
theory describing the near horizon region and the world volume non-critical
string theory. The modular invariance consistency condition of string theory is
exactly reproduced as the gauge anomaly cancellation condition in the little
string theories. We comment on aspects of the holographic nature of this
duality.
|
[
{
"created": "Fri, 16 Oct 1998 22:45:19 GMT",
"version": "v1"
},
{
"created": "Tue, 29 Dec 1998 18:50:16 GMT",
"version": "v2"
}
] |
2009-10-31
|
[
[
"Diaconescu",
"Duiliu-Emanuel",
""
],
[
"Gomis",
"Jaume",
""
]
] |
We consider Type IIB Neveu-Schwarz five-branes transverse to C^2/Z_n orbifolds and conjecture that string theory on the near horizon geometry is dual to the decoupled theory on the branes. We analyze the conformal field theory describing the near horizon region and the world volume non-critical string theory. The modular invariance consistency condition of string theory is exactly reproduced as the gauge anomaly cancellation condition in the little string theories. We comment on aspects of the holographic nature of this duality.
|
1204.3001
|
David Beke
|
David Beke
|
Scalar-Tensor theories from $\Lambda(\phi)$ Plebanski gravity
|
21 pages
| null |
10.1088/1742-6596/360/1/012043
| null |
hep-th gr-qc
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study a modification of the Plebanski action, which generically
corresponds to a bi-metric theory of gravity, and identify a subclass which is
equivalent to the Bergmann-Wagoner-Nordtvedt class of scalar-tensor theories.
In this manner, scalar-tensor theories are displayed as constrained BF
theories. We find that in this subclass, there is no need to impose reality of
the Urbantke metrics, as also the theory with real bivectors is a scalar-tensor
theory with a real Lorentzian metric. Furthermore, while under the former
reality conditions instabilities can arise from a wrong sign of the scalar mode
kinetic term, we show that such problems do not appear if the bivectors are
required to be real. Finally, we discuss how matter can be coupled to these
theories. The phenomenology of scalar field dark matter arises naturally within
this framework.
|
[
{
"created": "Fri, 13 Apr 2012 14:11:49 GMT",
"version": "v1"
}
] |
2015-06-04
|
[
[
"Beke",
"David",
""
]
] |
We study a modification of the Plebanski action, which generically corresponds to a bi-metric theory of gravity, and identify a subclass which is equivalent to the Bergmann-Wagoner-Nordtvedt class of scalar-tensor theories. In this manner, scalar-tensor theories are displayed as constrained BF theories. We find that in this subclass, there is no need to impose reality of the Urbantke metrics, as also the theory with real bivectors is a scalar-tensor theory with a real Lorentzian metric. Furthermore, while under the former reality conditions instabilities can arise from a wrong sign of the scalar mode kinetic term, we show that such problems do not appear if the bivectors are required to be real. Finally, we discuss how matter can be coupled to these theories. The phenomenology of scalar field dark matter arises naturally within this framework.
|
hep-th/9705130
|
Matthias Gaberdiel
|
O. Bergman, M.R. Gaberdiel, G. Lifschytz
|
Branes, Orientifolds and the Creation of Elementary Strings
|
24 pages, LaTeX, 4 postscript-figures; substantial changes to
sections 2 and 3
|
Nucl.Phys. B509 (1998) 194-215
|
10.1016/S0550-3213(97)00632-9
|
HUTP-97/A022, BRX TH-413, PUPT-1703
|
hep-th
| null |
The potential of a configuration of two Dirichlet branes for which the number
of ND-directions is eight is determined. Depending on whether one of the branes
is an anti-brane or a brane, the potential vanishes or is twice as large as the
dilaton-gravitational potential. This is shown to be related to the fact that a
fundamental string is created when two such branes cross. Special emphasis is
given to the D0-D8 system, for which an interpretation of these results in
terms of the massive IIA supergravity is presented. It is also shown that the
branes cannot move non-adiabatically in the transverse direction. The
configuration of a zero brane and an orientifold 8-plane is analyzed in a
similar way, and some implications for the type IA-heterotic duality and the
heterotic matrix theory are discussed.
|
[
{
"created": "Sun, 18 May 1997 20:41:31 GMT",
"version": "v1"
},
{
"created": "Mon, 16 Jun 1997 16:04:25 GMT",
"version": "v2"
},
{
"created": "Tue, 4 Nov 1997 15:48:02 GMT",
"version": "v3"
}
] |
2009-10-30
|
[
[
"Bergman",
"O.",
""
],
[
"Gaberdiel",
"M. R.",
""
],
[
"Lifschytz",
"G.",
""
]
] |
The potential of a configuration of two Dirichlet branes for which the number of ND-directions is eight is determined. Depending on whether one of the branes is an anti-brane or a brane, the potential vanishes or is twice as large as the dilaton-gravitational potential. This is shown to be related to the fact that a fundamental string is created when two such branes cross. Special emphasis is given to the D0-D8 system, for which an interpretation of these results in terms of the massive IIA supergravity is presented. It is also shown that the branes cannot move non-adiabatically in the transverse direction. The configuration of a zero brane and an orientifold 8-plane is analyzed in a similar way, and some implications for the type IA-heterotic duality and the heterotic matrix theory are discussed.
|
hep-th/0304219
|
Inyong Cho
|
Inyong Cho (LPT, Orsay) and Alexander Vilenkin (Tufts University)
|
Gravity of superheavy higher-dimensional global defects
|
19 pages, revtex, 6 eps figures
|
Phys.Rev. D68 (2003) 025013
|
10.1103/PhysRevD.68.025013
|
LPT-ORSAY 03-32
|
hep-th gr-qc
| null |
Numerical solutions of Einstein's and scalar-field equations are found for a
global defect in a higher-dimensional spacetime. The defect has a
$(3+1)$-dimensional core and a ``hedgehog'' scalar-field configuration in $n=3$
extra dimensions. For sufficiently low symmetry-breaking scales $\eta$, the
solutions are characterized by a flat worldsheet geometry and a constant solid
deficit angle in the extra dimensions, in agreement with previous work. For
$\eta$ above the higher-dimensional Planck scale, we find that static-defect
solutions are singular. The singularity can be removed if the requirement of
staticity is relaxed and defect cores are allowed to inflate. We obtain an
analytic solution for the metric of such inflating defects at large distances
from the core. The three extra dimensions of the nonsingular solutions have a
``cigar'' geometry. Although our numerical solutions were obtained for defects
of codimension $n=3$, we argue that the conclusions are likely to apply to all
$n\geq 3$.
|
[
{
"created": "Fri, 25 Apr 2003 16:51:45 GMT",
"version": "v1"
}
] |
2009-11-10
|
[
[
"Cho",
"Inyong",
"",
"LPT, Orsay"
],
[
"Vilenkin",
"Alexander",
"",
"Tufts University"
]
] |
Numerical solutions of Einstein's and scalar-field equations are found for a global defect in a higher-dimensional spacetime. The defect has a $(3+1)$-dimensional core and a ``hedgehog'' scalar-field configuration in $n=3$ extra dimensions. For sufficiently low symmetry-breaking scales $\eta$, the solutions are characterized by a flat worldsheet geometry and a constant solid deficit angle in the extra dimensions, in agreement with previous work. For $\eta$ above the higher-dimensional Planck scale, we find that static-defect solutions are singular. The singularity can be removed if the requirement of staticity is relaxed and defect cores are allowed to inflate. We obtain an analytic solution for the metric of such inflating defects at large distances from the core. The three extra dimensions of the nonsingular solutions have a ``cigar'' geometry. Although our numerical solutions were obtained for defects of codimension $n=3$, we argue that the conclusions are likely to apply to all $n\geq 3$.
|
hep-th/9910017
|
HGirotti
|
H. O. Girotti, Victor O. Rivelles
|
Gauge Dependence in the AdS/CFT Correspondence
|
13 pages, REVTEX, misprints in the abstract corrected. Minor changes.
Version to be published
|
Int.J.Mod.Phys. A15 (2000) 4379
|
10.1142/S0217751X00001439
| null |
hep-th
| null |
We consider the AdS space formulation of the classical dynamics deriving from
the Stueckelberg Lagrangian. The on-shell action is shown to be free of
infrared singularities as the vector boson mass tends to zero. In this limit
the model becomes Maxwell theory formulated in an arbitrary covariant gauge.
Then we use the AdS/CFT correspondence to compute the two-point correlation
functions on the boundary. It is shown that the gauge dependence concentrates
on the contact terms.
|
[
{
"created": "Fri, 1 Oct 1999 21:44:26 GMT",
"version": "v1"
},
{
"created": "Mon, 22 May 2000 21:07:43 GMT",
"version": "v2"
}
] |
2016-12-28
|
[
[
"Girotti",
"H. O.",
""
],
[
"Rivelles",
"Victor O.",
""
]
] |
We consider the AdS space formulation of the classical dynamics deriving from the Stueckelberg Lagrangian. The on-shell action is shown to be free of infrared singularities as the vector boson mass tends to zero. In this limit the model becomes Maxwell theory formulated in an arbitrary covariant gauge. Then we use the AdS/CFT correspondence to compute the two-point correlation functions on the boundary. It is shown that the gauge dependence concentrates on the contact terms.
|
1011.6635
|
Jean-Philippe Lansberg
|
J.P. Lansberg, B. Pire, L. Szymanowski
|
Spin Observables in Transition-Distribution-Amplitude Studies
|
Contributed to the 19th International Spin Physics Symposium (SPIN
2010), September 27 - October 2, 2010, Juelich, Germany. 8 pages, 7 figures,
uses jpconf.cls, jpconf11.clo, iopams.sty (included)
| null |
10.1088/1742-6596/295/1/012090
|
CPHT-PC103.1110
|
hep-ph hep-ex nucl-ex nucl-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
Exclusive hadronic reactions with a massive lepton pair (l^+l^-) in the final
state will be measured with PANDA at GSI-FAIR and with Compass at CERN, both in
p+p-bar -> l^+l^-+pi and pi+N -> N'+l^+l^-. Similarly, electroproduction of a
meson in the backward region will be studied at JLAB. We discuss here how the
spin structure of the amplitude for such processes will enable us to
disentangle various mechanisms. For instance, target-transverse-spin
asymmetries are specific of a partonic description, where the amplitude is
factorised in terms of baryon to meson or meson to baryon Transition
Distribution Amplitudes (TDAs) as opposed to what is expected from
baryon-exchange contributions.
|
[
{
"created": "Tue, 30 Nov 2010 18:19:41 GMT",
"version": "v1"
}
] |
2015-05-20
|
[
[
"Lansberg",
"J. P.",
""
],
[
"Pire",
"B.",
""
],
[
"Szymanowski",
"L.",
""
]
] |
Exclusive hadronic reactions with a massive lepton pair (l^+l^-) in the final state will be measured with PANDA at GSI-FAIR and with Compass at CERN, both in p+p-bar -> l^+l^-+pi and pi+N -> N'+l^+l^-. Similarly, electroproduction of a meson in the backward region will be studied at JLAB. We discuss here how the spin structure of the amplitude for such processes will enable us to disentangle various mechanisms. For instance, target-transverse-spin asymmetries are specific of a partonic description, where the amplitude is factorised in terms of baryon to meson or meson to baryon Transition Distribution Amplitudes (TDAs) as opposed to what is expected from baryon-exchange contributions.
|
1503.05836
|
Matti Heikinheimo
|
Sanjoy Biswas, Emidio Gabrielli, Matti Heikinheimo and Barbara Mele
|
Higgs-boson production in association with a Dark Photon in $e^+ e^-$
collisions
|
25 pages, 12 figures; Conclusion Section expandend, to appear in
JHEP; v5: typographical errors corrected
| null | null | null |
hep-ph hep-ex
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study the production of a Higgs boson recoiling from a massless invisible
system in $e^ + e^ -$ collisions. This is a quite distinctive signature that
can arise when the Higgs boson is produced in association with a massless dark
photon, which can happen in BSM scenarios foreseeing an extra unbroken $U(1)$
gauge group. Dark photons can indeed acquire effective couplings to the Higgs
boson as occurs in models recently proposed to generate exponentially-spread
Yukawa couplings. We analyze the signal and corresponding backgrounds for $H\to
b\bar{b}$, and estimate ILC and FCC-ee sensitivities in a model-independent
way.
|
[
{
"created": "Thu, 19 Mar 2015 16:43:13 GMT",
"version": "v1"
},
{
"created": "Wed, 25 Mar 2015 19:16:01 GMT",
"version": "v2"
},
{
"created": "Mon, 18 May 2015 11:17:57 GMT",
"version": "v3"
},
{
"created": "Thu, 13 Aug 2015 11:43:31 GMT",
"version": "v4"
},
{
"created": "Mon, 5 Sep 2016 12:20:46 GMT",
"version": "v5"
}
] |
2016-09-06
|
[
[
"Biswas",
"Sanjoy",
""
],
[
"Gabrielli",
"Emidio",
""
],
[
"Heikinheimo",
"Matti",
""
],
[
"Mele",
"Barbara",
""
]
] |
We study the production of a Higgs boson recoiling from a massless invisible system in $e^ + e^ -$ collisions. This is a quite distinctive signature that can arise when the Higgs boson is produced in association with a massless dark photon, which can happen in BSM scenarios foreseeing an extra unbroken $U(1)$ gauge group. Dark photons can indeed acquire effective couplings to the Higgs boson as occurs in models recently proposed to generate exponentially-spread Yukawa couplings. We analyze the signal and corresponding backgrounds for $H\to b\bar{b}$, and estimate ILC and FCC-ee sensitivities in a model-independent way.
|
2201.05082
|
Di Zhang
|
Xu Li, Di Zhang and Shun Zhou
|
One-loop Matching of the Type-II Seesaw Model onto the Standard Model
Effective Field Theory
|
37 pages, 3 figures, the version accepted for publication in JHEP; A
Mathematica Notebook containing all results for Wilson coefficients is
attached in the ancillary files
|
JHEP 04 (2022) 038
|
10.1007/JHEP04(2022)038
| null |
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper, we continue to construct the low-energy effective field
theories (EFTs) of the canonical seesaw models, which are natural extensions of
the Standard Model (SM) to accommodate tiny but nonzero neutrino masses.
Different from three right-handed neutrino singlets in the type-I seesaw model,
the Higgs triplet in the type-II seesaw model participates directly in the
electroweak gauge interactions, rendering the EFT construction more
challenging. By integrating out the heavy Higgs triplet in the
functional-integral formalism, we carry out a complete one-loop matching of the
type-II seesaw model onto the so-called Standard Model Effective Field Theory
(SMEFT). It turns out that 41 dimension-six operators (barring flavor
structures and Hermitian conjugates) in the Warsaw basis of the SMEFT can be
obtained, covering all those 31 dimension-six operators in the case of type-I
seesaw model. The Wilson coefficients for 41 dimension-six operators are
computed up to $\mathcal{O}\left( M^{-2}_\Delta \right)$ with $M^{}_\Delta$
being the mass scale of the Higgs triplet. Moreover, the branching ratios of
rare radiative decays of charged leptons $l^-_\alpha \to l^-_\beta + \gamma$
are calculated in the EFT and compared with that in the full theory in order to
demonstrate the practical application and the correctness of our EFT
construction.
|
[
{
"created": "Thu, 13 Jan 2022 17:07:48 GMT",
"version": "v1"
},
{
"created": "Wed, 9 Feb 2022 14:26:07 GMT",
"version": "v2"
},
{
"created": "Tue, 22 Mar 2022 12:37:24 GMT",
"version": "v3"
}
] |
2022-04-11
|
[
[
"Li",
"Xu",
""
],
[
"Zhang",
"Di",
""
],
[
"Zhou",
"Shun",
""
]
] |
In this paper, we continue to construct the low-energy effective field theories (EFTs) of the canonical seesaw models, which are natural extensions of the Standard Model (SM) to accommodate tiny but nonzero neutrino masses. Different from three right-handed neutrino singlets in the type-I seesaw model, the Higgs triplet in the type-II seesaw model participates directly in the electroweak gauge interactions, rendering the EFT construction more challenging. By integrating out the heavy Higgs triplet in the functional-integral formalism, we carry out a complete one-loop matching of the type-II seesaw model onto the so-called Standard Model Effective Field Theory (SMEFT). It turns out that 41 dimension-six operators (barring flavor structures and Hermitian conjugates) in the Warsaw basis of the SMEFT can be obtained, covering all those 31 dimension-six operators in the case of type-I seesaw model. The Wilson coefficients for 41 dimension-six operators are computed up to $\mathcal{O}\left( M^{-2}_\Delta \right)$ with $M^{}_\Delta$ being the mass scale of the Higgs triplet. Moreover, the branching ratios of rare radiative decays of charged leptons $l^-_\alpha \to l^-_\beta + \gamma$ are calculated in the EFT and compared with that in the full theory in order to demonstrate the practical application and the correctness of our EFT construction.
|
hep-th/0012177
|
Ennio Gozzi
|
E.Deotto, E.Gozzi
|
On the "Universal" N=2 Supersymmetry of Classical Mechanics
|
few misprints fixed with respect to Int.Jour.Mod.Phys.A vol 16, no15
(2001) 2709
|
Int.J.Mod.Phys.A16:2709,2001
|
10.1142/S0217751X01004190
| null |
hep-th
| null |
In this paper we continue the study of the geometrical features of a
functional approach to classical mechanics proposed some time ago. In
particular we try to shed some light on a N=2 "universal" supersymmetry which
seems to have an interesting interplay with the concept of ergodicity of the
system. To study the geometry better we make this susy local and clarify
pedagogically several issues present in the literature. Secondly, in order to
prepare the ground for a better understanding of its relation to ergodicity, we
study the system on constant energy surfaces. We find that the procedure of
constraining the system on these surfaces injects in it some local grassmannian
invariances and reduces the N=2 global susy to an N=1.
|
[
{
"created": "Tue, 19 Dec 2000 18:03:23 GMT",
"version": "v1"
},
{
"created": "Wed, 10 Jan 2001 13:09:57 GMT",
"version": "v2"
},
{
"created": "Fri, 9 Mar 2001 13:18:49 GMT",
"version": "v3"
},
{
"created": "Thu, 18 Oct 2001 14:02:02 GMT",
"version": "v4"
}
] |
2014-11-18
|
[
[
"Deotto",
"E.",
""
],
[
"Gozzi",
"E.",
""
]
] |
In this paper we continue the study of the geometrical features of a functional approach to classical mechanics proposed some time ago. In particular we try to shed some light on a N=2 "universal" supersymmetry which seems to have an interesting interplay with the concept of ergodicity of the system. To study the geometry better we make this susy local and clarify pedagogically several issues present in the literature. Secondly, in order to prepare the ground for a better understanding of its relation to ergodicity, we study the system on constant energy surfaces. We find that the procedure of constraining the system on these surfaces injects in it some local grassmannian invariances and reduces the N=2 global susy to an N=1.
|
1509.04645
|
Georgi Dvali
|
Gia Dvali
|
Non-Thermal Corrections to Hawking Radiation Versus the Information
Paradox
|
5 pages, Latex
| null |
10.1002/prop.201500096
| null |
hep-th astro-ph.CO gr-qc hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We provide a model-independent argument indicating that for a black hole of
entropy N the non-thermal deviations from Hawking radiation, per each emission
time, are of order 1/N, as opposed to exp(-N). This fact abolishes the standard
a priory basis for the information paradox.
|
[
{
"created": "Tue, 15 Sep 2015 17:10:49 GMT",
"version": "v1"
}
] |
2016-12-21
|
[
[
"Dvali",
"Gia",
""
]
] |
We provide a model-independent argument indicating that for a black hole of entropy N the non-thermal deviations from Hawking radiation, per each emission time, are of order 1/N, as opposed to exp(-N). This fact abolishes the standard a priory basis for the information paradox.
|
hep-ph/9710248
|
Petteri Keranen
|
Petteri Ker\"anen
|
Testing exotic neutrino-neutrino interactions with AGN neutrinos
|
8 pages, latex, no figures
|
Phys.Lett.B417:320-325,1998
|
10.1016/S0370-2693(97)01405-6
|
HIP-1997-56/TH
|
hep-ph astro-ph
| null |
We propose a test for non-standard neutrino-neutrino interactions by using
ultrahigh energy AGN neutrinos. Such interactions would influence the AGN
neutrino flux due to collisions with cosmic background neutrinos. For typical
AGN neutrinos we obtain an upper limit for the coupling constant $g<6.4\cdot
10^{-3}$ if the mediator is light and $g/(M_X/MeV) <0.013$ if the mediator is
heavy. We compare our results with constraints from other phenomena previously
considered.
|
[
{
"created": "Mon, 6 Oct 1997 10:25:28 GMT",
"version": "v1"
}
] |
2010-11-30
|
[
[
"Keränen",
"Petteri",
""
]
] |
We propose a test for non-standard neutrino-neutrino interactions by using ultrahigh energy AGN neutrinos. Such interactions would influence the AGN neutrino flux due to collisions with cosmic background neutrinos. For typical AGN neutrinos we obtain an upper limit for the coupling constant $g<6.4\cdot 10^{-3}$ if the mediator is light and $g/(M_X/MeV) <0.013$ if the mediator is heavy. We compare our results with constraints from other phenomena previously considered.
|
hep-th/0303035
|
Frederic Leblond
|
Frederic Leblond, Amanda W. Peet
|
SD-brane gravity fields and rolling tachyons
|
References added. Analysis for much broader range of solutions
presented. Conclusions unchanged. Time-reversal symmetric examples ruled out,
new examples are provided
|
JHEP 0304 (2003) 048
|
10.1088/1126-6708/2003/04/048
| null |
hep-th
| null |
S(pacelike)D-branes are objects arising naturally in string theory when
Dirichlet boundary conditions are imposed on the time direction. SD-brane
physics is inherently time-dependent. Previous investigations of gravity fields
of SD-branes have yielded undesirable naked spacelike singularities. We set up
the problem of coupling the most relevant open-string tachyonic mode to
massless closed-string modes in the bulk, with backreaction and Ramond-Ramond
fields included. We find solutions numerically in a self-consistent
approximation; our solutions are naturally asymptotically flat and
time-reversal asymmetric. We find completely nonsingular evolution; in
particular, the dilaton and curvature are well-behaved for all time. The
essential mechanism for spacetime singularity resolution is the inclusion of
full backreaction between the bulk fields and the rolling tachyon. Our analysis
is not the final word on the story, because we have to make some significant
approximations, most notably homogeneity of the tachyon on the unstable branes.
Nonetheless, we provide significant progress in plugging a gaping hole in prior
understanding of the gravity fields of SD-branes.
|
[
{
"created": "Wed, 5 Mar 2003 19:23:20 GMT",
"version": "v1"
},
{
"created": "Tue, 18 Mar 2003 21:32:07 GMT",
"version": "v2"
},
{
"created": "Wed, 16 Apr 2003 21:13:32 GMT",
"version": "v3"
}
] |
2009-11-10
|
[
[
"Leblond",
"Frederic",
""
],
[
"Peet",
"Amanda W.",
""
]
] |
S(pacelike)D-branes are objects arising naturally in string theory when Dirichlet boundary conditions are imposed on the time direction. SD-brane physics is inherently time-dependent. Previous investigations of gravity fields of SD-branes have yielded undesirable naked spacelike singularities. We set up the problem of coupling the most relevant open-string tachyonic mode to massless closed-string modes in the bulk, with backreaction and Ramond-Ramond fields included. We find solutions numerically in a self-consistent approximation; our solutions are naturally asymptotically flat and time-reversal asymmetric. We find completely nonsingular evolution; in particular, the dilaton and curvature are well-behaved for all time. The essential mechanism for spacetime singularity resolution is the inclusion of full backreaction between the bulk fields and the rolling tachyon. Our analysis is not the final word on the story, because we have to make some significant approximations, most notably homogeneity of the tachyon on the unstable branes. Nonetheless, we provide significant progress in plugging a gaping hole in prior understanding of the gravity fields of SD-branes.
|
1703.00402
|
Emidio Gabrielli
|
Sanjoy Biswas, Emidio Gabrielli, Matti Heikinheimo, Barbara Mele
|
Dark-photon searches via $ZH$ production at $e^+e^-$ colliders
|
20 pages, 11 figures, a few comments included, version matches the
PRD one
|
Phys. Rev. D 96, 055012 (2017)
|
10.1103/PhysRevD.96.055012
| null |
hep-ph hep-ex
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study the $ZH$ associated production followed by the Higgs $H\to \gamma
\bar{\gamma}$ decay into a photon plus an invisible and massless dark photon,
at future high-energy $e^+e^-$ facilities. Large $H\to \gamma \bar{\gamma}$
decay rates (with branching ratios up to a few percent) are allowed, thanks to
possible non-decoupling properties of the Higgs boson under specific
conditions, and unsuppressed dark-photon couplings in the dark sector. Such
large decay rates can be obtained in the framework of recent flavor models that
aim to naturally explain the observed spread in the fermion mass spectrum. We
analyze the experimental prospects for observing the $e^+e^-\rightarrow ZH$
process followed by the semi invisible Higgs decay into a photon plus a
massless invisible system. Search strategies for both the leptonic and the
hadronic final states (arising from $Z\rightarrow \mu^+\mu^-$ and $Z\rightarrow
q\bar{q}$, respectively) are outlined. We find that a $5\sigma$ sensitivity to
a branching fraction $BR_{\gamma\bar{\gamma}}\sim 3\times 10^{-4}$ can be
achieved by combining the two channels with an integrated luminosity of 10
ab$^{-1}$ at a c.m. energy of 240 GeV. This is considerably better than the
corresponding sensitivity in alternative channels previously studied at lepton
colliders. The analysis is model independent, and its results can be
straightforwardly applied to the search of any Higgs two-body decay into a
photon plus an undetected light particle.
|
[
{
"created": "Wed, 1 Mar 2017 17:28:27 GMT",
"version": "v1"
},
{
"created": "Tue, 10 Oct 2017 14:10:42 GMT",
"version": "v2"
}
] |
2017-10-11
|
[
[
"Biswas",
"Sanjoy",
""
],
[
"Gabrielli",
"Emidio",
""
],
[
"Heikinheimo",
"Matti",
""
],
[
"Mele",
"Barbara",
""
]
] |
We study the $ZH$ associated production followed by the Higgs $H\to \gamma \bar{\gamma}$ decay into a photon plus an invisible and massless dark photon, at future high-energy $e^+e^-$ facilities. Large $H\to \gamma \bar{\gamma}$ decay rates (with branching ratios up to a few percent) are allowed, thanks to possible non-decoupling properties of the Higgs boson under specific conditions, and unsuppressed dark-photon couplings in the dark sector. Such large decay rates can be obtained in the framework of recent flavor models that aim to naturally explain the observed spread in the fermion mass spectrum. We analyze the experimental prospects for observing the $e^+e^-\rightarrow ZH$ process followed by the semi invisible Higgs decay into a photon plus a massless invisible system. Search strategies for both the leptonic and the hadronic final states (arising from $Z\rightarrow \mu^+\mu^-$ and $Z\rightarrow q\bar{q}$, respectively) are outlined. We find that a $5\sigma$ sensitivity to a branching fraction $BR_{\gamma\bar{\gamma}}\sim 3\times 10^{-4}$ can be achieved by combining the two channels with an integrated luminosity of 10 ab$^{-1}$ at a c.m. energy of 240 GeV. This is considerably better than the corresponding sensitivity in alternative channels previously studied at lepton colliders. The analysis is model independent, and its results can be straightforwardly applied to the search of any Higgs two-body decay into a photon plus an undetected light particle.
|
1707.04429
|
Zhonghua Li
|
Limei Zhang, Xiaoxiong Zeng, Zhonghua Li
|
AdS Black Hole with Phantom Scalar Field
|
6 pages, 8 figures
| null | null | null |
hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
In this paper, we present an AdS black hole solution with Ricci flat horizon
in Einstein-phantom scalar theory. The phantom scalar fields just depend on the
transverse coordinates $x$ and $y$, and which are parameterized by the
parameter $\alpha$. We study the thermodynamics of the AdS phantom black hole.
Although its horizon is a Ricci flat Euclidean space, we find that the
thermodynamical properties of the black hole solution are qualitatively same as
those of AdS Schwarzschild black hole. Namely there exists a minimal
temperature, the large black hole is thermodynamically stable , while the
smaller one is unstable, so there is a so-called Hawking-Page phase transition
between the large black hole and the thermal gas solution in the AdS spacetime
in Poincare coordinates. We also calculate the entanglement entropy for a strip
geometry dual to the AdS phantom black holes and find that the behavior of the
entanglement entropy is qualitatively the same as that of the black hole
thermodynamical entropy.
|
[
{
"created": "Fri, 14 Jul 2017 09:28:57 GMT",
"version": "v1"
},
{
"created": "Thu, 27 Jul 2017 17:58:32 GMT",
"version": "v2"
}
] |
2017-07-28
|
[
[
"Zhang",
"Limei",
""
],
[
"Zeng",
"Xiaoxiong",
""
],
[
"Li",
"Zhonghua",
""
]
] |
In this paper, we present an AdS black hole solution with Ricci flat horizon in Einstein-phantom scalar theory. The phantom scalar fields just depend on the transverse coordinates $x$ and $y$, and which are parameterized by the parameter $\alpha$. We study the thermodynamics of the AdS phantom black hole. Although its horizon is a Ricci flat Euclidean space, we find that the thermodynamical properties of the black hole solution are qualitatively same as those of AdS Schwarzschild black hole. Namely there exists a minimal temperature, the large black hole is thermodynamically stable , while the smaller one is unstable, so there is a so-called Hawking-Page phase transition between the large black hole and the thermal gas solution in the AdS spacetime in Poincare coordinates. We also calculate the entanglement entropy for a strip geometry dual to the AdS phantom black holes and find that the behavior of the entanglement entropy is qualitatively the same as that of the black hole thermodynamical entropy.
|
hep-ph/0302142
|
Igor Shovkovy
|
Igor Shovkovy and Mei Huang
|
Gapless two-flavor color superconductor
|
6 pages, 4 figures. 1 reference and 1 figure are added; the
discussion of the effective potential properties is extended
|
Phys.Lett. B564 (2003) 205
|
10.1016/S0370-2693(03)00748-2
| null |
hep-ph astro-ph hep-th nucl-th
| null |
A new, gapless two-flavor color superconducting phase that appears under
conditions of local charge neutrality and $\beta$-equilibrium is revealed. In
this phase, the symmetry of the ground state is the same as in the conventional
two-flavor color superconductor. In the low-energy spectrum of this phase,
however, there are only two gapped fermionic quasiparticles, and the other four
quasiparticles are gapless. The origin and the basic properties of the gapless
two-flavor color superconductor are discussed. This phase is a natural
candidate for quark matter in cores of compact stars.
|
[
{
"created": "Mon, 17 Feb 2003 18:35:48 GMT",
"version": "v1"
},
{
"created": "Tue, 25 Feb 2003 11:46:53 GMT",
"version": "v2"
},
{
"created": "Tue, 22 Apr 2003 15:13:23 GMT",
"version": "v3"
}
] |
2009-11-10
|
[
[
"Shovkovy",
"Igor",
""
],
[
"Huang",
"Mei",
""
]
] |
A new, gapless two-flavor color superconducting phase that appears under conditions of local charge neutrality and $\beta$-equilibrium is revealed. In this phase, the symmetry of the ground state is the same as in the conventional two-flavor color superconductor. In the low-energy spectrum of this phase, however, there are only two gapped fermionic quasiparticles, and the other four quasiparticles are gapless. The origin and the basic properties of the gapless two-flavor color superconductor are discussed. This phase is a natural candidate for quark matter in cores of compact stars.
|
hep-ph/0702097
|
Per Osland
|
Abdul Wahab El Kaffas, Odd Magne Ogreid, Per Osland
|
CP Violation, Stability and Unitarity of the Two Higgs Doublet Model
|
9 pages, Contribution to "FANS2006", to be published in " Nonlinear
Phenomena in Complex Systems"
|
Nonlin.Phenom.ComplexSyst.10:347-357,2007
| null | null |
hep-ph
| null |
The Two-Higgs-Doublet Model is considered, in its CP-non-conserving version.
It is shown quantitatively how vacuum stability and tree-level unitarity in the
Higgs-Higgs-scattering sector constrain the parameter space of the model. In
particular, at high values of tanbeta, the model violates unitarity, unless
some of the Higgs bosons are heavy. In the regime of large CP violation in the
neutral-Higgs-t-quark sector, which requires tanbeta lsim 1, the Yukawa
coupling parameter space (determined by the neutral-Higgs-sector rotation
matrix) is reasonably unconstrained. On the other hand, the corresponding
neutral-Higgs-b-quark sector allows for large CP violation at tanbeta gg 1.
However, here the model is more constrained: Significant CP violation is
correlated with a considerable splitting among the two heavier Higgs bosons.
|
[
{
"created": "Fri, 9 Feb 2007 11:28:42 GMT",
"version": "v1"
}
] |
2008-11-26
|
[
[
"Kaffas",
"Abdul Wahab El",
""
],
[
"Ogreid",
"Odd Magne",
""
],
[
"Osland",
"Per",
""
]
] |
The Two-Higgs-Doublet Model is considered, in its CP-non-conserving version. It is shown quantitatively how vacuum stability and tree-level unitarity in the Higgs-Higgs-scattering sector constrain the parameter space of the model. In particular, at high values of tanbeta, the model violates unitarity, unless some of the Higgs bosons are heavy. In the regime of large CP violation in the neutral-Higgs-t-quark sector, which requires tanbeta lsim 1, the Yukawa coupling parameter space (determined by the neutral-Higgs-sector rotation matrix) is reasonably unconstrained. On the other hand, the corresponding neutral-Higgs-b-quark sector allows for large CP violation at tanbeta gg 1. However, here the model is more constrained: Significant CP violation is correlated with a considerable splitting among the two heavier Higgs bosons.
|
1502.00761
|
Maja Buri\'c
|
Maja Buric, John Madore and Luka Nenadovic
|
Spinors on a curved noncommutative space: coupling to torsion and the
Gross-Neveu model
|
14 pages
| null |
10.1088/0264-9381/32/18/185018
| null |
hep-th gr-qc
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We analyse the spinor action on a curved noncommutative space, the so-called
truncated Heisenberg algebra, and in particular, the nonminimal coupling of
spinors to the torsion. We find that dimensional reduction of the Dirac action
gives the noncommutative extension of the Gross-Neveu model, the model which
is, as shown by Vignes-Tourneret, fully renormalisable.
|
[
{
"created": "Tue, 3 Feb 2015 07:26:34 GMT",
"version": "v1"
}
] |
2015-09-23
|
[
[
"Buric",
"Maja",
""
],
[
"Madore",
"John",
""
],
[
"Nenadovic",
"Luka",
""
]
] |
We analyse the spinor action on a curved noncommutative space, the so-called truncated Heisenberg algebra, and in particular, the nonminimal coupling of spinors to the torsion. We find that dimensional reduction of the Dirac action gives the noncommutative extension of the Gross-Neveu model, the model which is, as shown by Vignes-Tourneret, fully renormalisable.
|
hep-ph/0105348
|
Sandor D. Katz
|
Z. Fodor and S.D. Katz
|
Ultrahigh energy cosmic rays as a Grand Unification signal
|
4 pages, 3 figures, talk to be presented at the 27th International
Cosmic Ray Conference, Hamburg, Germany, August 7-15, 2001
| null | null | null |
hep-ph astro-ph
| null |
We analyze the spectrum of the ultrahigh energy (above \approx 10^{9} GeV)
cosmic rays. With a maximum likelihood analysis we show that the observed
spectrum is consistent with the decay of extragalactic GUT scale particles. The
predicted mass for these superheavy particles is m_X=10^b GeV, where
b=14.6_{-1.7}^{+1.6}.
|
[
{
"created": "Thu, 31 May 2001 20:03:03 GMT",
"version": "v1"
}
] |
2007-05-23
|
[
[
"Fodor",
"Z.",
""
],
[
"Katz",
"S. D.",
""
]
] |
We analyze the spectrum of the ultrahigh energy (above \approx 10^{9} GeV) cosmic rays. With a maximum likelihood analysis we show that the observed spectrum is consistent with the decay of extragalactic GUT scale particles. The predicted mass for these superheavy particles is m_X=10^b GeV, where b=14.6_{-1.7}^{+1.6}.
|
hep-ph/9405227
|
Jaewan Kim
|
Jaewan Kim and Pierre Sikivie
|
Stretching Wiggly Strings
|
Written with ReVTeX 3.0 package. Two figures are not included.
Complete paper with postscript figures can be retrieved through anonymous ftp
@quark.phys.ufl.edu. Get /preprints/ifthep94_4.tar.gz, gunzip and tar it.
UFIFT-HEP-94-4
|
Phys.Rev. D50 (1994) 7410-7420
|
10.1103/PhysRevD.50.7410
| null |
hep-ph astro-ph hep-th
| null |
How does the amplitude of a wiggle on a string change when the string is
stretched? We answer this question for both longitudinal and transverse wiggles
and for arbitrary equation of state, {\it i.e.}, for arbitrary relation between
the tension $\tau$ and the energy per unit length $\epsilon$ of the string.
This completes our derivation of the renormalization of string parameters which
results from averaging out small scale wiggles on a string. The program is
presented here in its entirety.
|
[
{
"created": "Thu, 5 May 1994 05:50:13 GMT",
"version": "v1"
}
] |
2009-10-28
|
[
[
"Kim",
"Jaewan",
""
],
[
"Sikivie",
"Pierre",
""
]
] |
How does the amplitude of a wiggle on a string change when the string is stretched? We answer this question for both longitudinal and transverse wiggles and for arbitrary equation of state, {\it i.e.}, for arbitrary relation between the tension $\tau$ and the energy per unit length $\epsilon$ of the string. This completes our derivation of the renormalization of string parameters which results from averaging out small scale wiggles on a string. The program is presented here in its entirety.
|
1405.1692
|
Roberto Casadio
|
Roberto Casadio, Octavian Micu, Piero Nicolini
|
Minimum length effects in black hole physics
|
29 pages, 12 figures. To be published in "Quantum Aspects of Black
Holes", ed. X. Calmet (Springer, 2014)
| null |
10.1007/978-3-319-10852-0_10
| null |
hep-th gr-qc
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We review the main consequences of the possible existence of a minimum
measurable length, of the order of the Planck scale, on quantum effects
occurring in black hole physics. In particular, we focus on the ensuing minimum
mass for black holes and how modified dispersion relations affect the Hawking
decay, both in four space-time dimensions and in models with extra spatial
dimensions. In the latter case, we briefly discuss possible phenomenological
signatures.
|
[
{
"created": "Wed, 7 May 2014 18:37:21 GMT",
"version": "v1"
}
] |
2021-04-07
|
[
[
"Casadio",
"Roberto",
""
],
[
"Micu",
"Octavian",
""
],
[
"Nicolini",
"Piero",
""
]
] |
We review the main consequences of the possible existence of a minimum measurable length, of the order of the Planck scale, on quantum effects occurring in black hole physics. In particular, we focus on the ensuing minimum mass for black holes and how modified dispersion relations affect the Hawking decay, both in four space-time dimensions and in models with extra spatial dimensions. In the latter case, we briefly discuss possible phenomenological signatures.
|
hep-th/9709074
|
Yuri Gusev
|
Yuri Gusev and Andrei Zelnikov
|
Finite Temperature Nonlocal Effective Action for Scalar Fields
|
9 pages, LaTeX (title is changed)
|
Class.Quant.Grav.15:L13-L19,1998
|
10.1088/0264-9381/15/3/001
|
Alberta-Thy-18-97
|
hep-th gr-qc hep-ph
| null |
Scalar fields at finite temperature are considered in four dimensional
ultrastatic curved spacetime. One loop nonlocal effective action at finite
temperature is found up to the second order in curvature expansion. This action
is explicitly infrared finite. In the high temperature expansion of free
energy, essentially nonlocal terms linear in temperature are derived.
|
[
{
"created": "Wed, 10 Sep 1997 00:49:31 GMT",
"version": "v1"
},
{
"created": "Wed, 22 Oct 1997 00:08:27 GMT",
"version": "v2"
}
] |
2010-04-06
|
[
[
"Gusev",
"Yuri",
""
],
[
"Zelnikov",
"Andrei",
""
]
] |
Scalar fields at finite temperature are considered in four dimensional ultrastatic curved spacetime. One loop nonlocal effective action at finite temperature is found up to the second order in curvature expansion. This action is explicitly infrared finite. In the high temperature expansion of free energy, essentially nonlocal terms linear in temperature are derived.
|
2405.14942
|
Drew Backhouse
|
Jean Alexandre, Drew Backhouse, Eleni-Alexandra Kontou, Diego Pardo
Santos and Silvia Pla
|
Mapping 1+1-dimensional black hole thermodynamics to finite volume
effects
|
28 pages, 4 figures
| null | null | null |
hep-th gr-qc
|
http://creativecommons.org/licenses/by/4.0/
|
Both black hole thermodynamics and finite volume effects in quantum field
theory violate the null energy condition. Motivated by this, we compare
thermodynamic features between two 1+1-dimensional systems: (i) a scalar field
confined to a periodic spatial interval of length $a$ and tunneling between two
degenerate vacua; (ii) a dilatonic black hole at temperature $T$ in the
presence of matter fields. If we identify $a\propto T^{-1}$, we find similar
thermodynamic behaviours, which suggests some deeper connection arising from
the presence of non-trivial boundary conditions in both systems.
|
[
{
"created": "Thu, 23 May 2024 18:00:03 GMT",
"version": "v1"
}
] |
2024-06-04
|
[
[
"Alexandre",
"Jean",
""
],
[
"Backhouse",
"Drew",
""
],
[
"Kontou",
"Eleni-Alexandra",
""
],
[
"Santos",
"Diego Pardo",
""
],
[
"Pla",
"Silvia",
""
]
] |
Both black hole thermodynamics and finite volume effects in quantum field theory violate the null energy condition. Motivated by this, we compare thermodynamic features between two 1+1-dimensional systems: (i) a scalar field confined to a periodic spatial interval of length $a$ and tunneling between two degenerate vacua; (ii) a dilatonic black hole at temperature $T$ in the presence of matter fields. If we identify $a\propto T^{-1}$, we find similar thermodynamic behaviours, which suggests some deeper connection arising from the presence of non-trivial boundary conditions in both systems.
|
hep-th/9703139
|
Kurt Haller
|
Mario Belloni, Lusheng Chen, and Kurt Haller (University of
Connecticut)
|
Gauss's law, gauge invariance, and long-range forces in QCD
|
9 pages, LaTeX, uses REVTeX
|
Phys.Lett. B403 (1997) 316-322
|
10.1016/S0370-2693(97)00522-4
|
UCONN 97-02
|
hep-th hep-ph
| null |
We use a unitary operator constructed in earlier work to transform the
Hamiltonian for QCD in the temporal ($A_0=0$) gauge into a representation in
which the quark field is gauge-invariant, and its elementary excitations --
quark and antiquark creation and annihilation operators -- implement Gauss's
law. In that representation, the interactions between gauge-dependent parts of
the gauge field and the spinor (quark) field have been transformed away and
replaced by long-range non-local interactions of quark color charge densities.
These long-range interactions connect SU(3) color charge densities through an
infinite chain of gauge-invariant gauge fields either to other SU(3) color
charge densities, or to a gluon "anchor". We discuss possible implications of
this formalism for low-energy processes, including confinement of quarks that
are not in color singlet configurations.
|
[
{
"created": "Wed, 19 Mar 1997 18:43:19 GMT",
"version": "v1"
}
] |
2009-10-30
|
[
[
"Belloni",
"Mario",
"",
"University of\n Connecticut"
],
[
"Chen",
"Lusheng",
"",
"University of\n Connecticut"
],
[
"Haller",
"Kurt",
"",
"University of\n Connecticut"
]
] |
We use a unitary operator constructed in earlier work to transform the Hamiltonian for QCD in the temporal ($A_0=0$) gauge into a representation in which the quark field is gauge-invariant, and its elementary excitations -- quark and antiquark creation and annihilation operators -- implement Gauss's law. In that representation, the interactions between gauge-dependent parts of the gauge field and the spinor (quark) field have been transformed away and replaced by long-range non-local interactions of quark color charge densities. These long-range interactions connect SU(3) color charge densities through an infinite chain of gauge-invariant gauge fields either to other SU(3) color charge densities, or to a gluon "anchor". We discuss possible implications of this formalism for low-energy processes, including confinement of quarks that are not in color singlet configurations.
|
hep-th/9209015
|
Akishi Kato
|
Akishi Kato, Yas-Hiro Quano and Jun'ichi Shiraishi
|
Free Boson Representation of $q$-Vertex Operators and their Correlation
Functions
|
22 pages, latex file, UT-618 (revised version)
|
Commun.Math.Phys. 157 (1993) 119-138
|
10.1007/BF02098022
| null |
hep-th
| null |
A bosonization scheme of the $q$-vertex operators of $\uqa$ for arbitrary
level is obtained. They act as intertwiners among the highest weight modules
constructed in a bosonic Fock space. An integral formula is proposed for
$N$-point functions and explicit calculation for two-point function is
presented.
|
[
{
"created": "Sat, 5 Sep 1992 07:28:19 GMT",
"version": "v1"
},
{
"created": "Mon, 14 Sep 1992 11:43:42 GMT",
"version": "v2"
}
] |
2009-10-22
|
[
[
"Kato",
"Akishi",
""
],
[
"Quano",
"Yas-Hiro",
""
],
[
"Shiraishi",
"Jun'ichi",
""
]
] |
A bosonization scheme of the $q$-vertex operators of $\uqa$ for arbitrary level is obtained. They act as intertwiners among the highest weight modules constructed in a bosonic Fock space. An integral formula is proposed for $N$-point functions and explicit calculation for two-point function is presented.
|
hep-th/0309233
|
Igor Tyutin
|
Igor Batalin and Igor Tyutin
|
On the transformations of hamiltonian gauge algebra under rotations of
constraints
|
11 pages, some misprints removed
|
Int.J.Mod.Phys.A20:895-905,2005
|
10.1142/S0217751X05021336
|
FIAN/TD/14/03
|
hep-th
| null |
By explicit calculation of the effect of a ghost-dependent canonical
transformation of BRST-charge, we derive the corresponding transformation law
for structure coefficients of hamiltonian gauge algebra under rotation of
constraints.We show the transformation law to deviate from the behaviour
(expected naively) characteristic to a genuine connection.
|
[
{
"created": "Thu, 25 Sep 2003 12:29:23 GMT",
"version": "v1"
},
{
"created": "Wed, 17 Dec 2003 12:08:12 GMT",
"version": "v2"
}
] |
2010-11-05
|
[
[
"Batalin",
"Igor",
""
],
[
"Tyutin",
"Igor",
""
]
] |
By explicit calculation of the effect of a ghost-dependent canonical transformation of BRST-charge, we derive the corresponding transformation law for structure coefficients of hamiltonian gauge algebra under rotation of constraints.We show the transformation law to deviate from the behaviour (expected naively) characteristic to a genuine connection.
|
hep-th/9801066
|
Jae-Suk Park
|
Robbert Dijkgraaf, Jae-Suk Park and Bernd Schroers
|
N=4 Supersymmetric Yang-Mills Theory on a Kaehler Surface
|
30 pages, harvmac, some corrections with additional comments
| null | null |
ITFA-97-09
|
hep-th
| null |
We study N=4 supersymmetric Yang-Mills theory on a Kaehler manifold with
$b_2^+ \geq 3$. Adding suitable perturbations we show that the partition
function of the N=4 theory is the sum of contributions from two branches: (i)
instantons, (ii) a special class of Seiberg-Witten monopoles. We determine the
partition function for the theories with gauge group SU(2) and SO(3), using
S-duality. This leads us to a formula for the Euler characteristic of the
moduli space of instantons.
|
[
{
"created": "Mon, 12 Jan 1998 14:32:50 GMT",
"version": "v1"
},
{
"created": "Tue, 23 Feb 1999 19:38:19 GMT",
"version": "v2"
}
] |
2007-05-23
|
[
[
"Dijkgraaf",
"Robbert",
""
],
[
"Park",
"Jae-Suk",
""
],
[
"Schroers",
"Bernd",
""
]
] |
We study N=4 supersymmetric Yang-Mills theory on a Kaehler manifold with $b_2^+ \geq 3$. Adding suitable perturbations we show that the partition function of the N=4 theory is the sum of contributions from two branches: (i) instantons, (ii) a special class of Seiberg-Witten monopoles. We determine the partition function for the theories with gauge group SU(2) and SO(3), using S-duality. This leads us to a formula for the Euler characteristic of the moduli space of instantons.
|
hep-ph/0008231
|
Yara do Amaral Coutinho
|
F.M.L. Almeida Jr.,Y. A. Coutinho, J. A. Martins Simoes, M.A.B. do
Vale
|
Single neutral heavy lepton production at electron-muon colliders
|
4 pages, 14 jpg figures, Published Phys.Lett B494 (2000) 273-279
|
Phys.Lett.B494:273-279,2000
|
10.1016/S0370-2693(00)01195-3
| null |
hep-ph
| null |
New heavy Majorana and Dirac neutrinos production at future electron-muon
colliders are investigated. The production of a single heavy neutrino is shown
to be more relevant than pair production when comparing cross sections and
neutrino mass ranges. The process $e^\pm \mu^\mp \longrightarrow {\nu}
\ell^{\pm} W^{\mp}$ is studied including on-shell and off-shell heavy neutrino
effects. Distributions are calculated including hadronization effects and
experimental cuts that suppress background, in order to have a clear signal for
heavy neutral leptons.
|
[
{
"created": "Tue, 22 Aug 2000 16:58:20 GMT",
"version": "v1"
},
{
"created": "Fri, 5 Jan 2001 17:09:47 GMT",
"version": "v2"
}
] |
2019-08-17
|
[
[
"Almeida",
"F. M. L.",
"Jr."
],
[
"Coutinho",
"Y. A.",
""
],
[
"Simoes",
"J. A. Martins",
""
],
[
"Vale",
"M. A. B. do",
""
]
] |
New heavy Majorana and Dirac neutrinos production at future electron-muon colliders are investigated. The production of a single heavy neutrino is shown to be more relevant than pair production when comparing cross sections and neutrino mass ranges. The process $e^\pm \mu^\mp \longrightarrow {\nu} \ell^{\pm} W^{\mp}$ is studied including on-shell and off-shell heavy neutrino effects. Distributions are calculated including hadronization effects and experimental cuts that suppress background, in order to have a clear signal for heavy neutral leptons.
|
hep-th/9304094
| null |
G. Grignani and G. Nardelli
|
Canonical Analysis of Poincare' Gauge Theories for Two Dimansional
Gravity
|
13 pages, plain \TeX
|
Class.Quant.Grav.10:2569-2580,1993
|
10.1088/0264-9381/10/12/016
|
DFUPG-76-1993/UTF-292-1993
|
hep-th
| null |
Following the general method discussed in Refs.[1,2], Liouville gravity and
the 2 dimensional model of non-Einstenian gravity ${\cal L} \sim curv^2 +
torsion^2 + cosm. const.$ can be formulated as ISO(1,1) gauge theories. In the
first order formalism the models present, besides the Poincar\'e gauge
symmetry, additional local symmetries. We show that in both models one can fix
these additional symmetries preserving the ISO(1,1) gauge symmetry and the
diffeomorphism invariance, so that, after a preliminary Dirac procedure, the
remaining constraints uniquely satisfy the ISO(1,1) algebra. After the
additional symmetry is fixed, the equations of motion are unaltered. One thus
remarkably simplifies the canonical structure, especially of the second model.
Moreover, one shows that the Poincar\'e group can always be used consistently
as a gauge group for gravitational theories in two dimensions.
|
[
{
"created": "Wed, 21 Apr 1993 12:50:04 GMT",
"version": "v1"
}
] |
2010-04-06
|
[
[
"Grignani",
"G.",
""
],
[
"Nardelli",
"G.",
""
]
] |
Following the general method discussed in Refs.[1,2], Liouville gravity and the 2 dimensional model of non-Einstenian gravity ${\cal L} \sim curv^2 + torsion^2 + cosm. const.$ can be formulated as ISO(1,1) gauge theories. In the first order formalism the models present, besides the Poincar\'e gauge symmetry, additional local symmetries. We show that in both models one can fix these additional symmetries preserving the ISO(1,1) gauge symmetry and the diffeomorphism invariance, so that, after a preliminary Dirac procedure, the remaining constraints uniquely satisfy the ISO(1,1) algebra. After the additional symmetry is fixed, the equations of motion are unaltered. One thus remarkably simplifies the canonical structure, especially of the second model. Moreover, one shows that the Poincar\'e group can always be used consistently as a gauge group for gravitational theories in two dimensions.
|
hep-th/0407069
|
Mboyo Esole
|
Mboyo Esole
|
The Non-Local Massive Yang-Mills Action as a Gauged Sigma Model
|
1+10 pages
| null | null | null |
hep-th
| null |
We show that the massive Yang--Mills action having as a mass term the
non-local operator introduced by Gubarov, Stodolsky, and Zakharov is
classically equivalent to a principal gauged sigma model. The non-local mass
corresponds to the topological term of the sigma model. The latter is obtained
once the degrees of freedom implicitly generated in the non-local action are
explicitly implemented as group elements. The non-local action is recovered by
integrating out these group elements. In contrast to the usual gauge-fixed
treatment, the sigma model point of view provides a safe framework in which
calculation are tractable while keeping a full control of gauge-invariance. It
shows that the non-local massive Yang--Mills action is naturally associated
with the low-energy description of QCD in the Chiral Perturbation Theory
approach. Moreover, the sigma model admits solutions called center vortices
familiar in different (de)-confinement and chiral symmetry breaking scenarios.
This suggests that the non-local operator introduced by Gubarov, Stodolsky, and
Zakharov might be sensitive to center vortices configurations.
|
[
{
"created": "Fri, 9 Jul 2004 12:02:25 GMT",
"version": "v1"
}
] |
2007-05-23
|
[
[
"Esole",
"Mboyo",
""
]
] |
We show that the massive Yang--Mills action having as a mass term the non-local operator introduced by Gubarov, Stodolsky, and Zakharov is classically equivalent to a principal gauged sigma model. The non-local mass corresponds to the topological term of the sigma model. The latter is obtained once the degrees of freedom implicitly generated in the non-local action are explicitly implemented as group elements. The non-local action is recovered by integrating out these group elements. In contrast to the usual gauge-fixed treatment, the sigma model point of view provides a safe framework in which calculation are tractable while keeping a full control of gauge-invariance. It shows that the non-local massive Yang--Mills action is naturally associated with the low-energy description of QCD in the Chiral Perturbation Theory approach. Moreover, the sigma model admits solutions called center vortices familiar in different (de)-confinement and chiral symmetry breaking scenarios. This suggests that the non-local operator introduced by Gubarov, Stodolsky, and Zakharov might be sensitive to center vortices configurations.
|
2406.03943
|
Rafal Maciula
|
Victor P. Goncalves, Rafal Maciula, and Antoni Szczurek
|
The asymmetric intrinsic charm in the nucleon and its implications for
the $D^{0}$ production in the LHCb $p\!+\!\!^{20}\!N\!e$ fixed-target
experiment
|
23 pages, 11 pages. arXiv admin note: text overlap with
arXiv:2206.02750
| null | null | null |
hep-ph hep-ex
|
http://creativecommons.org/licenses/by/4.0/
|
Recent results indicate that charm quarks are intrinsic components of the
proton wave function, and that the charm and anticharm distributions for a
given value of the Bjorken - $x$ variable can be different. In this paper, we
will investigate the impact of this asymmetric intrinsic charm on the
production of $D^0$ and ${\bar D}^0$ mesons for fixed target $p \!+
^{20}\!\!Ne$ collisions at the LHCb. In our calculations, we include the
contribution of the gluon-gluon fusion, gluon - charm and recombination
processes and assume distinct models for the treatment of the intrinsic charm
component. We demonstrate that the presence of an intrinsic charm improves the
description of the current data for the rapidity and transverse momentum
distributions of $D$ mesons. However, such models are not able to describe the
LHCb data for the $D^0$-${\bar D}^0$ asymmetry at large transverse momentum,
which point out that the description of the intrinsic charm needs to be
improved and/or new effects should be taken into account in the production of
heavy mesons at forward rapidities in fixed - target collisions.
|
[
{
"created": "Thu, 6 Jun 2024 10:35:41 GMT",
"version": "v1"
}
] |
2024-06-07
|
[
[
"Goncalves",
"Victor P.",
""
],
[
"Maciula",
"Rafal",
""
],
[
"Szczurek",
"Antoni",
""
]
] |
Recent results indicate that charm quarks are intrinsic components of the proton wave function, and that the charm and anticharm distributions for a given value of the Bjorken - $x$ variable can be different. In this paper, we will investigate the impact of this asymmetric intrinsic charm on the production of $D^0$ and ${\bar D}^0$ mesons for fixed target $p \!+ ^{20}\!\!Ne$ collisions at the LHCb. In our calculations, we include the contribution of the gluon-gluon fusion, gluon - charm and recombination processes and assume distinct models for the treatment of the intrinsic charm component. We demonstrate that the presence of an intrinsic charm improves the description of the current data for the rapidity and transverse momentum distributions of $D$ mesons. However, such models are not able to describe the LHCb data for the $D^0$-${\bar D}^0$ asymmetry at large transverse momentum, which point out that the description of the intrinsic charm needs to be improved and/or new effects should be taken into account in the production of heavy mesons at forward rapidities in fixed - target collisions.
|
2003.04638
|
Marcos Rodriguez Cardoso
|
M. C. Rodriguez
|
Short review about the MSSM with three right-handed neutrinos (MSSM3RHN)
|
47 pages, 3 tables and 10 figures
| null | null | null |
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We give a review about the Minimal Supersymmetric Standard Model with three
right-handed neutrinos (MSSM3RHN). We, first introduce the minimal set of
fields to built this model in their superfields formalism. After it, we build
the lagrangian of the model in the superspace formalism and also introduce the
soft terms to break SUSY. We show how to get masses to the neutrinos and
sneutrinos in this model.
|
[
{
"created": "Tue, 10 Mar 2020 11:19:59 GMT",
"version": "v1"
},
{
"created": "Fri, 31 Jul 2020 16:59:15 GMT",
"version": "v2"
}
] |
2020-08-03
|
[
[
"Rodriguez",
"M. C.",
""
]
] |
We give a review about the Minimal Supersymmetric Standard Model with three right-handed neutrinos (MSSM3RHN). We, first introduce the minimal set of fields to built this model in their superfields formalism. After it, we build the lagrangian of the model in the superspace formalism and also introduce the soft terms to break SUSY. We show how to get masses to the neutrinos and sneutrinos in this model.
|
hep-ph/0106191
|
Peter Kroll
|
P. Kroll (Wuppertal Univ.)
|
Generalized parton distributions at large momentum transfer
|
6 pages, 6 figures (using LATEX with sprocl.sty and epsfig), talk
presented at the 9th International Workshop on Deep Inelastic Scattering
(DIS2001), Bologna, April 2001
| null |
10.1142/9789812778345_0100
| null |
hep-ph
| null |
The role of generalized parton distributions in wide-angle exclusive
reactions will be discussed. In contrast to deep virtual exclusive reactions
the wide angle processes offer the possibility of investigating the generalized
parton distributions at large momentum transfer.
|
[
{
"created": "Mon, 18 Jun 2001 09:41:29 GMT",
"version": "v1"
}
] |
2015-06-25
|
[
[
"Kroll",
"P.",
"",
"Wuppertal Univ."
]
] |
The role of generalized parton distributions in wide-angle exclusive reactions will be discussed. In contrast to deep virtual exclusive reactions the wide angle processes offer the possibility of investigating the generalized parton distributions at large momentum transfer.
|
hep-th/0003009
|
Shinsuke Mochizuki Nishigaki
|
T. Nagao, S. M. Nishigaki
|
Massive chiral random matrix ensembles at beta = 1 & 4 : QCD Dirac
operator spectra
|
12 pages, REVTeX 3.1, 2 figures; (v2) corrections on signatures in
eqs.(48), (53), (C7), and on referential notes
|
Phys.Rev. D62 (2000) 065007
|
10.1103/PhysRevD.62.065007
|
TIT-HEP-442
|
hep-th hep-lat
| null |
The zero momentum sectors in effective theories of QCD coupled to pseudoreal
(two colors) and real (adjoint) quarks have alternative descriptions in terms
of chiral orthogonal and symplectic ensembles of random matrices. Using this
correspondence, we compute correlation functions of Dirac operator eigenvalues
within a sector with an arbitrary topological charge in a presence of finite
quark masses of the order of the smallest Dirac eigenvalue. These novel
correlation functions, expressed in terms of Pfaffians, interpolate between
known results for the chiral and quenched limits as quark masses vary.
|
[
{
"created": "Wed, 1 Mar 2000 20:20:37 GMT",
"version": "v1"
},
{
"created": "Tue, 28 Mar 2000 09:27:23 GMT",
"version": "v2"
}
] |
2009-10-31
|
[
[
"Nagao",
"T.",
""
],
[
"Nishigaki",
"S. M.",
""
]
] |
The zero momentum sectors in effective theories of QCD coupled to pseudoreal (two colors) and real (adjoint) quarks have alternative descriptions in terms of chiral orthogonal and symplectic ensembles of random matrices. Using this correspondence, we compute correlation functions of Dirac operator eigenvalues within a sector with an arbitrary topological charge in a presence of finite quark masses of the order of the smallest Dirac eigenvalue. These novel correlation functions, expressed in terms of Pfaffians, interpolate between known results for the chiral and quenched limits as quark masses vary.
|
2212.14417
|
Martin Cederwall
|
Martin Cederwall
|
A minimal b ghost
|
9 pp
| null | null | null |
hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The $b$ ghost, or $b$ operator, used for fixing Siegel gauge in the pure
spinor superfield formalism, is a composite operator of negative ghost number,
satisfying $\{q,b\}=\square$, where $q$ is the pure spinor differential (BRST
operator). It is traditionally constructed using non-minimal variables.
However, since all cohomology has minimal representatives, it seems likely that
there should be versions of physically meaningful operators, also with negative
ghost number, using only minimal variables. The purpose of this letter is to
demonstrate that this statement holds by providing a concrete construction in
$D=10$ super-Yang-Mills theory, and to argue that it is a general feature in
the pure spinor superfield formalism.
|
[
{
"created": "Thu, 29 Dec 2022 18:46:57 GMT",
"version": "v1"
}
] |
2023-01-02
|
[
[
"Cederwall",
"Martin",
""
]
] |
The $b$ ghost, or $b$ operator, used for fixing Siegel gauge in the pure spinor superfield formalism, is a composite operator of negative ghost number, satisfying $\{q,b\}=\square$, where $q$ is the pure spinor differential (BRST operator). It is traditionally constructed using non-minimal variables. However, since all cohomology has minimal representatives, it seems likely that there should be versions of physically meaningful operators, also with negative ghost number, using only minimal variables. The purpose of this letter is to demonstrate that this statement holds by providing a concrete construction in $D=10$ super-Yang-Mills theory, and to argue that it is a general feature in the pure spinor superfield formalism.
|
hep-th/0003133
|
Dionisio Bazeia
|
M. Alves, D. Bazeia, and V.B. Bezerra
|
Black hole formation in bidimensional dilaton gravity coupled to scalar
matter systems
|
Latex, 9 pages. Published in Mod. Phys. Lett. A14 (1999) 2687
|
Mod.Phys.Lett. A14 (1999) 2687-2694
|
10.1142/S0217732399002820
| null |
hep-th
| null |
This work deals with the formation of black hole in bidimensional dilaton
gravity coupled to scalar matter fields. We investigate two scalar matter
systems, one described by a sixth power potential and the other defined with
two scalar fields containing up to the fourth power in the fields. The
topological solutions that appear in these cases allow the formation of black
holes in the corresponding dilaton gravity models.
|
[
{
"created": "Wed, 15 Mar 2000 19:02:39 GMT",
"version": "v1"
}
] |
2009-10-31
|
[
[
"Alves",
"M.",
""
],
[
"Bazeia",
"D.",
""
],
[
"Bezerra",
"V. B.",
""
]
] |
This work deals with the formation of black hole in bidimensional dilaton gravity coupled to scalar matter fields. We investigate two scalar matter systems, one described by a sixth power potential and the other defined with two scalar fields containing up to the fourth power in the fields. The topological solutions that appear in these cases allow the formation of black holes in the corresponding dilaton gravity models.
|
hep-ph/9609336
|
Stefano Frixione
|
S. Frixione (ETH)
|
Prospects for heavy flavour photoproduction at HERA
|
8 pages Latex, uses epsfig.sty, 3 eps figures included. To appear in
the proceedings of the workshop "Future physics at HERA", eds. G. Ingelman,
A. De Roeck and R. Klanner
| null | null |
ETH-TH/96-33
|
hep-ph
| null |
I discuss few selected topics in heavy flavour photoproduction at HERA which
require large integrated luminosity in order to be experimentally investigated.
I present phenomenological predictions for bottom production. As a possible
application of measurements involving double-tagged charm events, I outline a
method for the direct measurement of the gluon density in the proton. The
possibility of using charm data in polarized electron-proton collisions to
constrain the polarized gluon density in the proton is also discussed.
|
[
{
"created": "Thu, 12 Sep 1996 15:54:31 GMT",
"version": "v1"
}
] |
2007-05-23
|
[
[
"Frixione",
"S.",
"",
"ETH"
]
] |
I discuss few selected topics in heavy flavour photoproduction at HERA which require large integrated luminosity in order to be experimentally investigated. I present phenomenological predictions for bottom production. As a possible application of measurements involving double-tagged charm events, I outline a method for the direct measurement of the gluon density in the proton. The possibility of using charm data in polarized electron-proton collisions to constrain the polarized gluon density in the proton is also discussed.
|
1610.06986
|
Yueling Yang
|
Junfeng Sun, Qingxia Li, Yueling Yang, Haiyan Li, Qin Chang, Zhiqing
Zhang
|
${\Upsilon}(1S)$ ${\to}$ $B_{c}{\pi}$, $B_{c}K$ decays with perturbative
QCD approach
|
13 pages
|
Physical Review D 92, 074028 (2015)
|
10.1103/PhysRevD.92.074028
| null |
hep-ph
|
http://creativecommons.org/licenses/by/4.0/
|
With the potential prospects of the ${\Upsilon}(1S)$ at high-luminosity
dedicated heavy-flavor factories, the bottom-changing ${\Upsilon}(1S)$ ${\to}$
$B_{c}{\pi}$, $B_{c}K$ weak decays are studied with the pQCD approach. It is
found that branching ratio for the color-favored and CKM-favored
${\Upsilon}(1S)$ ${\to}$ $B_{c}{\pi}$ decay can reach up to ${\cal
O}(10^{-11})$. So the ${\Upsilon}(1S)$ ${\to}$ $B_{c}{\pi}$ decay might be
measured promisingly by the future experiments.
|
[
{
"created": "Sat, 22 Oct 2016 01:50:07 GMT",
"version": "v1"
}
] |
2016-10-25
|
[
[
"Sun",
"Junfeng",
""
],
[
"Li",
"Qingxia",
""
],
[
"Yang",
"Yueling",
""
],
[
"Li",
"Haiyan",
""
],
[
"Chang",
"Qin",
""
],
[
"Zhang",
"Zhiqing",
""
]
] |
With the potential prospects of the ${\Upsilon}(1S)$ at high-luminosity dedicated heavy-flavor factories, the bottom-changing ${\Upsilon}(1S)$ ${\to}$ $B_{c}{\pi}$, $B_{c}K$ weak decays are studied with the pQCD approach. It is found that branching ratio for the color-favored and CKM-favored ${\Upsilon}(1S)$ ${\to}$ $B_{c}{\pi}$ decay can reach up to ${\cal O}(10^{-11})$. So the ${\Upsilon}(1S)$ ${\to}$ $B_{c}{\pi}$ decay might be measured promisingly by the future experiments.
|
2207.13977
|
Francesco Giacosa
|
Francesco Giacosa
|
Multichannel decay: alternative derivation of the $i$-th channel decay
probability
|
8 pages. Prepared as a proceedings contribution for the 4th
Jagiellonian Symposium on Advances in Particle Physics and Medicine,
Jagiellonian University, 10-15/7/2022, Krak\'ow, Poland
| null |
10.12693/APhysPolA.142.436
| null |
hep-ph quant-ph
|
http://creativecommons.org/licenses/by/4.0/
|
In the study of decays, it is quite common that an unstable quantum
state/particle has multiple distinct decay channels. In this case, besides the
survival probability $p(t)$, also the probability $w_{i}(t)$ that the decay
occurs between $(0,t)$ in the $i$-th channel is a relevant object. The general
form of the function $w_{i}(t)$ was recently presented in PLB \textbf{831}
(2022), 137200. Here, we provide a novel and detailed `joint' derivation of
both $p(t)$ and $w_{i}(t)$. As it is well known, $p(t)$ is not an exponential
function; similarly, $w_{i}(t)$ is also not such. In particular, the ratio
$w_{i}/w_{j}$ (for $i\neq j)$ is not a simple constant, as it would be in the
exponential limit. The functions $w_{i}(t)$ and their mutual ratios may
therefore represent a novel tool to study the non-exponential nature of the
decay law.
|
[
{
"created": "Thu, 28 Jul 2022 09:40:47 GMT",
"version": "v1"
}
] |
2022-12-07
|
[
[
"Giacosa",
"Francesco",
""
]
] |
In the study of decays, it is quite common that an unstable quantum state/particle has multiple distinct decay channels. In this case, besides the survival probability $p(t)$, also the probability $w_{i}(t)$ that the decay occurs between $(0,t)$ in the $i$-th channel is a relevant object. The general form of the function $w_{i}(t)$ was recently presented in PLB \textbf{831} (2022), 137200. Here, we provide a novel and detailed `joint' derivation of both $p(t)$ and $w_{i}(t)$. As it is well known, $p(t)$ is not an exponential function; similarly, $w_{i}(t)$ is also not such. In particular, the ratio $w_{i}/w_{j}$ (for $i\neq j)$ is not a simple constant, as it would be in the exponential limit. The functions $w_{i}(t)$ and their mutual ratios may therefore represent a novel tool to study the non-exponential nature of the decay law.
|
1012.3419
|
Zhong-Bo Kang
|
Zhong-Bo Kang (RIKEN BNL)
|
QCD evolution of naive-time-reversal-odd fragmentation functions
|
8 pages,4 figures
|
Phys.Rev.D83:036006,2011
|
10.1103/PhysRevD.83.036006
| null |
hep-ph
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
We study QCD evolution equations of the first transverse-momentum-moment of
the naive-time-reversal-odd fragmentation functions - the Collins function and
the polarizing fragmentation function. We find for the Collins function case
that the evolution kernel has a diagonal piece same as that for the
transversity fragmentation function, while for the polarizing fragmentation
function case this piece is the same as that for the unpolarized fragmentation
function. Our results might have important implications in the current global
analysis of spin asymmetries.
|
[
{
"created": "Wed, 15 Dec 2010 18:37:30 GMT",
"version": "v1"
}
] |
2011-02-23
|
[
[
"Kang",
"Zhong-Bo",
"",
"RIKEN BNL"
]
] |
We study QCD evolution equations of the first transverse-momentum-moment of the naive-time-reversal-odd fragmentation functions - the Collins function and the polarizing fragmentation function. We find for the Collins function case that the evolution kernel has a diagonal piece same as that for the transversity fragmentation function, while for the polarizing fragmentation function case this piece is the same as that for the unpolarized fragmentation function. Our results might have important implications in the current global analysis of spin asymmetries.
|
1506.05042
|
Fernando M\'endez
|
J. Gamboa and F. Mendez
|
Dark and Visible Photons as Source of CP Violation
|
4 pages, no figures
| null | null | null |
hep-ph hep-th
|
http://arxiv.org/licenses/nonexclusive-distrib/1.0/
|
The problem of excess gamma radiation in the center of galaxy is discussed
assuming that the photon's production is dominated by two kinds of processes,
the first one due to the conventional kinetic mixing term and, secondly, due to
a kinetic mixing term violating the CP symmetry between dark and visible
photons. The CP violation symmetry between dark and visible sectors is not
forbidden and, in principle, could be considered as an additional source of CP
violation. The conversion probability between dark and visible photons is
calculated and compared between both processes. The processes violating CP are
less significant but contribute non-trivially to the excess gamma radiation.
|
[
{
"created": "Tue, 16 Jun 2015 17:34:26 GMT",
"version": "v1"
}
] |
2015-06-17
|
[
[
"Gamboa",
"J.",
""
],
[
"Mendez",
"F.",
""
]
] |
The problem of excess gamma radiation in the center of galaxy is discussed assuming that the photon's production is dominated by two kinds of processes, the first one due to the conventional kinetic mixing term and, secondly, due to a kinetic mixing term violating the CP symmetry between dark and visible photons. The CP violation symmetry between dark and visible sectors is not forbidden and, in principle, could be considered as an additional source of CP violation. The conversion probability between dark and visible photons is calculated and compared between both processes. The processes violating CP are less significant but contribute non-trivially to the excess gamma radiation.
|
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