pinecone/core-2020-05-10-deduplication huggingface dataset:
Symmetries of Holographic Super-Minimal Models

We compute the asymptotic symmetry of the higher-spin supergravity theory in
AdS_3 and obtain an infinite-dimensional non-linear superalgebra, which we call
the super-W_infinity[lambda] algebra. According to the recently proposed
supersymmetric duality between higher-spin supergravity in an AdS_3 background
and the 't Hooft limit of the N=2 CP^n Kazama-Suzuki model on the boundary,
this symmetry algebra should agree with the 't Hooft limit of the chiral
algebra of the CFT, SW_n. We provide two nontrivial checks of the duality. By
comparing the algebras, we explicitly match the lowest-spin commutation
relations in the super-W_infinity[lambda] with the corresponding commutation
relations in the 't Hooft limit on the CFT side. We also consider the
degenerate representations of the two algebras and find that the spectra of the
chiral primary fields are identical.Comment: 33 pages, references added, some errors corrected, discussions about
  the truncation of the shs[lambda] algebra and reobtaining the original
  shs[lambda] algebra from the super-W_infinity[lambda] algebra adde
Holographic Photon Production with Magnetic Field in Anisotropic Plasmas

We investigate the thermal photon production from constant magnetic field in
a strongly coupled and anisotropic plasma via the gauge/gravity duality. The
dual geometry with pressure anisotropy is generated from the axion-dilaton
gravity action introduced by Mateos and Trancancelli and the magnetic field is
coupled to fundamental matters(quarks) through the D3/D7 embeddings. We find
that the photon spectra with different quark mass are enhanced at large
frequency when the photons are emitted parallel to the anisotropic direction
with larger pressure or perpendicular to the magnetic field. However, in the
opposite conditions for the emitted directions, the spectra approximately
saturate isotropic results in the absence of magnetic field. On the other hand,
a resonance emerges at moderate frequency for the photon spectrum with heavy
quarks when the photons move perpendicular to the magnetic field. The resonance
is more robust when the photons are polarized along the magnetic field. On the
contrary, in the presence of pressure anisotropy, the resonance will be
suppressed. There exist competing effects of magnetic field and pressure
anisotropy on meson melting in the strongly coupled super Yang-Mills plasma,
while we argue that the suppression led by anisotropy may not be applied to the
quark gluon plasma.Comment: 22 pages, 16 figures, references added, journal versio
Standard Model Vacuum Stability and Weyl Consistency Conditions

At high energy the standard model possesses conformal symmetry at the
classical level. This is reflected at the quantum level by relations between
the different beta functions of the model. These relations are known as the
Weyl consistency conditions. We show that it is possible to satisfy them order
by order in perturbation theory, provided that a suitable coupling constant
counting scheme is used. As a direct phenomenological application, we study the
stability of the standard model vacuum at high energies and compare with
previous computations violating the Weyl consistency conditions.Comment: RevTeX, 13 pages, 5 figure
Quantum corrections to dynamical holographic thermalization:
  entanglement entropy and other non-local observables

We investigate the thermalization time scale in the planar limit of the SU(N)
N=4 SYM plasma at strong yet finite 't Hooft coupling by considering its
supergravity dual description, including the full O(alpha'^3) type IIB string
theory corrections. We also discuss on the effects of the leading non-planar
corrections. We use extended geometric probes in the bulk which are dual to
different non-local observables in the N=4 SYM theory. This is carried out
within the framework of dynamical holographic thermalization.Comment: 19 pages, 4 figures. V2: References added, 1 figure added, 1 figure
  corrected, enlarged discussions about extended probes, typos corrected.
  Published versio
Neutrino Masses and Higgs Vacuum Stability

The Standard Model electroweak vacuum has been found to be metastable, with
the true stable vacuum given by a large, phenomenologically unacceptable vacuum
expectation value $\approx M_{P}$. Moreover, it may be unstable in an
inflationary universe. Motivated by the necessity of physics beyond the
Standard Model and to accommodate non-zero neutrino masses, we investigate
vacuum stability within type-II seesaw and left-right symmetric models. Our
analysis is performed by solving the renormalisation group equations, carefully
taking into account the relevant threshold corrections. We demonstrate that a
phenomenologically viable left-right symmetric model can be constructed by
matching it with the SM at one-loop. In both models we demonstrate the
existence of a large area of parameter space where the Higgs vacuum is
absolutely stable.Comment: 31 pages, 11 figure
A preferred ground state for the scalar field in de Sitter space

We investigate a recent proposal for a distinguished vacuum state of a free
scalar quantum field in an arbitrarily curved spacetime, known as the
Sorkin-Johnston (SJ) vacuum, by applying it to de Sitter space. We derive the
associated two-point functions on both the global and Poincar\'e (cosmological)
patches in general d+1 dimensions. In all cases where it is defined, the SJ
vacuum belongs to the family of de Sitter invariant alpha-vacua. We obtain
different states depending on the spacetime dimension, mass of the scalar
field, and whether the state is evaluated on the global or Poincar\'e patch. We
find that the SJ vacuum agrees with the Euclidean/Bunch-Davies state for heavy
("principal series") fields on the global patch in even spacetime dimensions.
We also compute the SJ vacuum on a causal set corresponding to a causal diamond
in 1+1 dimensional de Sitter space. Our simulations show that the mean of the
SJ two-point function on the causal set agrees well with its expected continuum
counterpart.Comment: 35 pages, 9 figure
On higher spin realizations of K(E10)

Starting from the known unfaithful spinorial representations of the compact
subalgebra K(E10) of the split real hyperbolic Kac-Moody algebra E10 we
construct new fermionic `higher spin' representations of this algebra (for
`spin-5/2' and `spin-7/2', respectively) in a second quantized framework. Our
construction is based on a simplified realization of K(E10) on the Dirac and
the vector spinor representations in terms of the associated roots, and on a
re-definition of the vector spinor first introduced by Damour and Hillmann. The
latter replaces manifestly SO(10) covariant expressions by new expressions that
are covariant w.r.t. SO(1,9), the invariance group of the DeWitt metric
restricted to the space of scale factors. We present explicit expressions for
all K(E10) elements that are associated to real roots of the hyperbolic algebra
(of which there are infinitely many), as well as novel explicit realizations of
the generators associated to imaginary roots and their multiplicities. We also
discuss the resulting realizations of the Weyl group.Comment: 33 page
All Off-Shell R^2 Invariants in Five Dimensional N=2 Supergravity

We construct supersymmetric completions of various curvature squared terms in
five dimensional supergravity with eight supercharges. Adopting the dilaton
Weyl multiplet, we obtain the minimal off-shell supersymmetric Ricci scalar
squared as well as all vector multiplets coupled curvature squared invariants.
Since the minimal off-shell supersymmetric Riemann tensor squared and
Gauss-Bonnet combination in the dilaton Weyl multiplet have been obtained
before, both the minimal off-shell and the vector multiplets coupled curvature
squared invariants in the dilation Weyl multiplet are complete. We also
constructed an off-shell Ricci scalar squared invariant utilizing the standard
Weyl multiplet. The supersymmetric Ricci scalar squared in the standard Weyl
multiplet is coupled to n number of vector multiplets by construction, and it
deforms the very special geometry. We found that in the supersymmetric AdS_5
vacuum, the very special geometry defined on the moduli space is modified in a
simple way. Finally, we study the magnetic string and electric black hole
solutions in the presence of supersymmetric Ricci scalar squared.Comment: 28 pages, v3: Typos Corrected, Version appeared in JHE
The all-loop integrable spin-chain for strings on AdS_3 x S^3 x T^4: the massive sector

We bootstrap the all-loop dynamic S-matrix for the homogeneous psu(1,1|2)^2 spin-chain believed to correspond to the discretization of the massive modes of string theory on AdS_3 x S^3 x T^4. The S-matrix is the tensor product of two copies of the su(1|1)^2 invariant S-matrix constructed recently for the d(2,1;alpha)^2 chain, and depends on two antisymmetric dressing phases. We write down the crossing equations that these phases have to satisfy. Furthermore, we present the corresponding Bethe Ansatz, which differs from the one previously conjectured, and discuss how our construction matches several recent perturbative calculations
Holographic meson mass splitting in the Nuclear Matter

We study the holographic light meson spectra and their mass splitting in the
nuclear medium. In order to describe the nuclear matter, we take into account
the thermal charged AdS geometry with two flavor charges, which can be
reinterpreted as the number densities of proton and neutron after some field
redefinitions. We show that the meson mass splitting occurs when there exists
the density difference between proton and neutron. Depending on the flavor
charge, the mass of the positively (negatively) charged meson increases
(decreases) as the density difference increases, whereas the neutral meson mass
is independent of the density difference. In the regime of the large nucleon
density with a relatively large number difference between proton and neutron,
we find that negatively charged pion becomes massless in the nuclear medium, so
the pion condensate can occur. We also investigate the binding energy of a
heavy quarkonium in the nuclear medium, in which the binding energy of a heavy
quarkonium becomes weaker as the density difference increases.Comment: 22 pages, 5 figures, references adde
Open spin chains for giant gravitons and relativity

We study open spin chains for strings stretched between giant graviton states
in the N=4 SYM field theory in the collective coordinate approach. We study the
boundary conditions and the effective Hamiltonian of the corresponding spin
chain to two loop order.
  The ground states of the spin chain have energies that match the relativistic
dispersion relation characteristic of massive W boson particles on the
worldvolume of the giant graviton configurations, up to second order in the
limit where the momentum is much larger than the mass. We find evidence for a
non-renormalization theorem for the ground state wave function of this spin
chain system. We also conjecture a generalization of this result to all loop
orders which makes it compatible with a fully relativistic dispersion relation.
We show that the conjecture follows if one assumes that the spin chain admits a
central charge extension that is sourced by the giant gravitons, generalizing
the giant magnon dispersion relation for closed string excitations. This
provides evidence for ten dimensional local physics mixing AdS directions and
the five-sphere emerging from an N=4 SYM computation in the presence of a
non-trivial background (made of D-branes) that break the conformal field theory
of the system.Comment: 48 pages, 3 figures. v2: typos fixe
Two-dimensional solutions for Born-Infeld fields

The non-linear second order Born-Infeld equation is reduced to a simpler first order complex equation, which can be trivially solved for the coordinates as functions of the field. Each solution is determined by the choice of a holomorphic function subjected to boundary conditions. The explanation of the method is accompanied by applications to Born-Infeld electrostatics, magnetostatics and wave propagation.Fil: Ferraro, Rafael. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentin
Zoology of heterotic supercurrent supermultiplets in d=2

We present various (0,2) heterotic supercurrent supermultiplets in (1+1)
dimensional quantum field theories. From the minimal supercurrent
supermultiplets, we deduce conditions on symmetry enhancement such as Lorentz
invariance, (chiral) dilatation invariance, R-invariance, (chiral) conformal
invariance and their various combinations. Our construction covers many
interesting and/or exotic possibilities such as Lifshitz supersymmetry and
warped superconformal algebra. We also discuss the corresponding supergravity
by gauging the supercurrent supermultiplet. In particular, we propose a novel
class of heterotic supergravity based on the virial supercurrent.Comment: 40 pages, minor correction
Note on Entanglement Temperature for Low Thermal Excited States in
  Higher Derivative Gravity

We investigate the entanglement temperature of a small scale subsystem in low
excited states by using holographic method. Especially, we study the
entanglement entropy and entanglement temperature in higher derivative
gravities which are considered as low thermal excitation of pure AdS gravity.
We find that the entanglement entropy are related to the central charges of
boundary CFT. The relation between the variance of entanglement entropy and
energy of a small scale subsystem has been also obtained. Furthermore, the
relation is consistent with the first law-like relation that is proposed by
Phys. Rev. Lett. 110, 091602 (2013). Finally, we derive the formula of the
variance of entanglement entropy in general excited states in gravity
background with the Fefferman-Graham coordinates and the entanglement
temperature can be figured out in special case.Comment: 26 pages, references added, more typos corrected, accepted by JHE
Non-perturbative  λΦ4 in D=1+1: an example of the constructive quantum field theory approach in a schematic way

During the '70, several relativistic quantum field theory models in D = 1 + 1 and also in D = 2 + 1 have been constructed in a non-perturbative way. That was done in the so-called constructive quantum field theory approach, whose main results have been  obtained by a clever use of Euclidean functional methods. Although in the construction of a single model there are several technical steps, some of them involving long proofs, the constructive quantum field theory approach contains conceptual insights about relativistic quantum field theory that deserved to be known and which are accessible without entering in technical details. The purpose of this note is to illustrate such insights by providing an oversimplified schematic exposition of the simple case of lambda(Phi)4 (with m > 0) in D = 1 + 1.  Because of the absence of ultraviolet divergences in its perturbative version, this simple example , although does not capture all the difficulties in the constructive quantum field  theory approach, allows to stress those difficulties inherent to the non-perturbative definition. We have made an effort in order to avoid several of the long technical intermediate steps without missing the main ideas and making contact with the usual language of the  perturbative approach.Fil: Gueron, Jorge. Universidad Católica Argentina. Facultad de Ciencias Fisico Matemáticas e Ingeniería. Departamento de Matemática; ArgentinaFil: Leston, Mauricio. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentin
Three-body gravitino decays in the MSSM

We present results from a new calculation of two- and three-body decays of
the gravitino including all possible Feynman graphs. The work is done in the
R-parity conserving Minimal Supersymmetric Standard Model, assuming that the
gravitino is unstable. We calculate the full width for the three-body decay
process Gravitino -> \chi_1 X Y, where \chi_1 is the lightest neutralino that
plays the role of the lightest supersymmetric particle, and X, Y are standard
model particles. For calculating the squared amplitudes we use the packages
FeynArts and FormCalc, with appropriate extensions to accommodate the gravitino
with spin 3/2. Our code treats automatically the intermediate exchanged
particles that are on their mass shell, using the narrow width approximation.
This method considerably simplifies the complexity of the evaluation of the
total gravitino width and stabilizes it numerically. At various points of the
supersymmetric parameter space, we compare the full two-body and the three-body
results with approximations used in the past. In addition, we discuss the
relative sizes of the full two-body and the three-body gravitino decay widths.
Our results are obtained using the package GravitinoPack, that will be publicly
available soon, including various handy features.Comment: 29 pages, 24 eps figures. Version to appear in JHE
Day-Night Asymmetries in Active-Sterile Solar Neutrino Oscillations

Day-night asymmetries in active-sterile solar neutrino oscillations are
discussed in the general $3+N_{s}$ mixing framework with three active and N_s
sterile neutrinos. Analytical expressions of the probability of neutrino flavor
transitions in the Earth in the perturbative approximation and in the slab
approximation are presented and the effects of active-sterile mixing and of the
CP-violating phases are discussed. The accuracy of the analytical
approximations and the properties of the day-night asymmetries are illustrated
numerically in the 3+1 neutrino mixing framework.Comment: 30 pages, 8 gigures, publshed in JHE
Holographic R\'enyi Entropies at Finite Coupling

We compute R\'enyi entropies for a spherical entangling surface in
four-dimensional N=4 super-Yang-Mills at strong coupling using the AdS/CFT
correspondence. Incorporating the effects of the leading \alpha' corrections to
the low energy effective action of type IIB string theory, we calculate the
leading corrections in inverse powers of the 't Hooft coupling (and the number
of colours). The results are compared with known weak coupling calculations.
Setting the order of the R\'enyi entropy q to one, it reduces to the
entanglement entropy and the strong and weak coupling results match without any
corrections, as expected. In the limit of q going to 0, the relation between
the strong and weak coupling entropies is connected to the known corrections
for the thermal free energy in flat space. We also compute the correction to
the scaling dimension of twist operators.Comment: 29 pages, 3 figure
Leptonic Dynamical Yukawa Couplings

A dynamical origin of the Yukawa couplings is a promising scenario to explain
the flavour puzzle. The focus of this letter is set on the role of the neutrino
Majorana character: when an $O(2)_{N_R}$ flavour symmetry acts on the
right-handed neutrino sector, the minimum of the scalar potential allows for
large mixing angles -in contrast to the simplest quark case- and predicts a
maximal Majorana phase. This leads to a strong correlation between neutrino
mass hierarchy and mixing pattern. Realistic solutions point to the existence
of three heavy right-handed neutrinos.Comment: 8 pages. V2: references added; results unchange
Two-loop master integrals for $ q\overline{q}\to VV $ : the planar topologies

The two-loop QCD corrections to vector boson pair production at hadron colliders involve a new class of Feynman integrals: two-loop four-point functions with two off-shell external legs. We describe their reduction to a small set of master integrals by solving linear relations among them. We then use differential equations in the external invariants to compute all master integrals that are relevant to planar Feynman amplitudes. Our results are expressed analytically in terms of generalized harmonic polylogarithms. The calculation relies heavily on techniques that exploit the algebraic structure of these functions, which we describe in detail
Moduli Stabilization in a de Sitter Compactification Model

We discuss the moduli stabilization in a de Sitter compactification model
obtained coupling D-dimensional gravity to scalar and gauge fields. This class
of models is characterized by two moduli: one related to the volume of the
internal space, the other to the warp factor. While the volume modulus can be
fixed by appropriately tuning the gauge field strength, curvature of the
internal space, and cosmological constant, the same mechanism does not work for
the warp modulus. In this paper we discuss a stabilization mechanism based on
quantum effects and show that both moduli can be efficiently stabilized.Comment: 26 pages, 8 figures, Journal versio
A Holographic Model of Heavy-light Mesons

We construct a holographic model of heavy-light mesons by extending the
AdS/QCD to incorporate the behavior of the heavy quark limit. In that limit,
the QCD dynamics is governed by the light quark and the heavy quark simply
plays the role of a static color source. The heavy quark spin symmetry can be
treated as a global symmetry in the AdS bulk. As a consequence, the heavy-light
mesons are mapped to "fermions" in the AdS theory. The light flavor chiral
symmetry is naturally built in by this construction, and its breaking produces
the splitting of the parity-doubled heavy-light meson states. The scaling
dependences of physical quantities on the heavy quark mass in the heavy quark
effective theory are reproduced. The mass spectra and decay constants of the B
and D mesons can be well fit by suitable choices of model parameters. The
couplings between the heavy-light mesons and the pions are also calculated. The
holographic model may capture the essence of the long distance effects of QCD
and can serve as a useful tool for studying the non-perturbative hadronic
matrix elements involving heavy-light mesons.Comment: 31 pages, 2 figure
On the Integrability of Four Dimensional N=2 Gauge Theories in the Omega
  Background

We continue to investigate the relationship between the infrared physics of
N=2 supersymmetric gauge theories in four dimensions and various integrable
models such as Gaudin, Calogero-Moser and quantum spin chains. We prove
interesting dualities among some of these integrable systems by performing
different, albeit equivalent, quantizations of the Seiberg-Witten curve of the
four dimensional theory. We also discuss conformal field theories related to
N=2 4d gauge theories by the Alday-Gaiotto-Tachikawa (AGT) duality and the role
of conformal blocks of those CFTs in the integrable systems. As a consequence,
the equivalence of conformal blocks of rank two Toda and
Novikov-Wess-Zumino-Witten (WZNW) theories on the torus with punctures is
found.Comment: 37 pages, 10 figures, references added, figures modified, JHEP
  versio
Higgs pair production in the NMSSM at the LHC

In the NMSSM it is well possible to find an additional Higgs boson with a
mass below 125 GeV which remains invisible in standard Higgs boson search
channels. We study the Higgs pair production cross sections times branching
fractions in this scenario, focusing on gluon fusion and the bb+tautau and
bb+gammagamma final states. Summing over the SM-like and the lighter Higgs
states, the production cross sections times branching fractions are never below
the ones for SM Higgs pair production. Sizable enhancements of the signal rates
are also possible, notably if a lighter Higgs state is produced. However, the
rates involving at least one lighter Higgs boson are not always sufficiently
large to guarantee its discovery.Comment: 14 pages, 17 figures, references adde