pinecone/core-2020-05-10-deduplication huggingface dataset:
Scattering and duality in the 2 dimensional OSP(2|2) Gross Neveu and
  sigma models

We write the thermodynamic Bethe ansatz for the massive OSp(2|2) Gross Neveu
and sigma models. We find evidence that the GN S matrix proposed by Bassi and
Leclair [12] is the correct one. We determine features of the sigma model S
matrix, which seem highly unconventional; we conjecture in particular a
relation between this sigma model and the complex sine-Gordon model at a
particular value of the coupling. We uncover an intriguing duality between the
OSp(2|2) GN (resp. sigma) model on the one hand, and the SO(4) sigma (resp. GN
model) on the other, somewhat generalizing to the massive case recent results
on OSp(4|2). Finally, we write the TBA for the (SUSY version of the) flow into
the random bond Ising model proposed by Cabra et al. [39], and conclude that
their S matrix cannot be correct.Comment: 41 pages, 27 figures. v2: minor revisio
Fundamental Strings and Higher Derivative Corrections to d-Dimensional
  Black Holes

We study aspects of d-dimensional black holes with two electric charges,
corresponding to fundamental strings with generic momentum and winding on an
internal circle. The perturbative alpha' corrections to such black holes and
their gravitational thermodynamics are obtained. The latter are derived using
the Euclidean approach and the Wald formula for the entropy. We find that the
entropy and the charge/mass ratio of black holes increase in alpha' for any
mass and charges, and in all dimensions.Comment: 21 pages, v2: refs. and a comment added. v3: refs. and comments adde
Some comments on spacelike minimal surfaces with null polygonal
  boundaries in $AdS_m$

We discuss some geometrical issues related to spacelike minimal surfaces in
$AdS_m$ with null polygonal boundaries at conformal infinity. In particular for
$AdS_4$, two holomorphic input functions for the Pohlmeyer reduced system are
identified. This system contains two coupled differential equations for two
functions $\alpha (z,\bar z)$ and $\beta (z,\bar z)$, related to curvature and
torsion of the surface. Furthermore, we conjecture that, for a polynomial
choice of the two holomorphic functions, the relative positions of their zeros
encode the conformal invariant data of the boundary null $2n$-gon.Comment: 13 pages, a note and references added, version to appear in JHE
The Sigma Model on Complex Projective Superspaces

The sigma model on complex projective superspaces CP^{S-1|S} gives rise to a
continuous family of interacting 2D conformal field theories which are
parametrized by the curvature radius R and the theta angle \theta. Our main
goal is to determine the spectrum of the model, non-perturbatively as a
function of both parameters. We succeed to do so for all open boundary
conditions preserving the full global symmetry of the model. In string theory
parlor, these correspond to volume filling branes that are equipped with a
monopole line bundle and connection. The paper consists of two parts. In the
first part, we approach the problem within the continuum formulation. Combining
combinatorial arguments with perturbative studies and some simple free field
calculations, we determine a closed formula for the partition function of the
theory. This is then tested numerically in the second part. There we propose a
spin chain regularization of the CP^{S-1|S} model with open boundary conditions
and use it to determine the spectrum at the conformal fixed point. The
numerical results are in remarkable agreement with the continuum analysis.Comment: 59 pages, 6 figures, 1 tabl
N=4 Superconformal Algebra and the Entropy of HyperKahler Manifolds

We study the elliptic genera of hyperKahler manifolds using the
representation theory of N=4 superconformal algebra. We consider the
decomposition of the elliptic genera in terms of N=4 irreducible characters,
and derive the rate of increase of the multiplicities of half-BPS
representations making use of Rademacher expansion. Exponential increase of the
multiplicity suggests that we can associate the notion of an entropy to the
geometry of hyperKahler manifolds. In the case of symmetric products of K3
surfaces our entropy agrees with the black hole entropy of D5-D1 system.Comment: 25 pages, 1 figur
New Orientifold Weak Coupling Limits in F-theory

We present new explicit constructions of weak coupling limits of F-theory
generalizing Sen's construction to elliptic fibrations which are not necessary
given in a Weierstrass form. These new constructions allow for an elegant
derivation of several brane configurations that do not occur within the
original framework of Sen's limit, or which would require complicated geometric
tuning or break supersymmetry. Our approach is streamlined by first deriving a
simple geometric interpretation of Sen's weak coupling limit. This leads to a
natural way of organizing all such limits in terms of transitions from
semistable to unstable singular fibers. These constructions provide a new
playground for model builders as they enlarge the number of supersymmetric
configurations that can be constructed in F-theory. We present several explicit
examples for E8, E7 and E6 elliptic fibrations.Comment: 45 pages, typos correcte
Holographic Operator Mixing and Quasinormal Modes on the Brane

We provide a framework for calculating holographic Green's functions from
general bilinear actions and fields obeying coupled differential equations in
the bulk. The matrix-valued spectral function is shown to be independent of the
radial bulk coordinate. Applying this framework we improve the analysis of
fluctuations in the D3/D7 system at finite baryon density, where the
longitudinal perturbations of the world-volume gauge field couple to the scalar
fluctuations of the brane embedding. We compute the spectral function and show
how its properties are related to the quasinormal mode spectrum. We study the
crossover from the hydrodynamic diffusive to the reactive regime and the
movement of quasinormal modes as functions of temperature and density. We also
compute their dispersion relations and find that they asymptote to the
lightcone for large momenta.Comment: 42 pages, 12 figure
Penner Type Matrix Model and Seiberg-Witten Theory

We discuss the Penner type matrix model recently proposed by Dijkgraaf and
Vafa for a possible explanation of the relation between four-dimensional gauge
theory and Liouville theory by making use of the connection of the matrix model
to two-dimensional CFT. We first consider the relation of gauge couplings
defined in UV and IR regimes of N_f = 4, N = 2 supersymmetric gauge theory
being related as $q_{{\rm UV}}={\vartheta_2(q_{{\rm IR}})^4/\vartheta_3(q_{{\rm
IR}})^4}$. We then use this relation to discuss the action of modular
transformation on the matrix model and determine its spectral curve.
  We also discuss the decoupling of massive flavors from the N_f = 4 matrix
model and derive matrix models describing asymptotically free N = 2 gauge
theories. We find that the Penner type matrix theory reproduces correctly the
standard results of N = 2 supersymmetric gauge theories.Comment: 22 pages; v2: references added, typos corrected; v3: a version to
  appear in JHE
Light-like mesons and deep inelastic scattering in finite-temperature
  AdS/CFT with flavor

We use the holographic dual of a finite-temperature, strongly-coupled, gauge
theory with a small number of flavors of massive fundamental quarks to study
meson excitations and deep inelastic scattering (DIS) in the low-temperature
phase, where the mesons are stable. We show that a high-energy flavor current
with nearly light-like kinematics disappears into the plasma by resonantly
producing mesons in highly excited states. This mechanism generates the same
DIS structure functions as in the high temperature phase, where mesons are
unstable and the current disappears through medium-induced parton branching. To
establish this picture, we derive analytic results for the meson spectrum,
which are exact in the case of light-like mesons and which corroborate and
complete previous, mostly numerical, studies in the literature. We find that
the meson levels are very finely spaced near the light-cone, so that the
current can always decay, without a fine-tuning of its kinematics.Comment: 43 pages, 6 figure
Decaying into the Hidden Sector

The existence of light hidden sectors is an exciting possibility that may be
tested in the near future. If DM is allowed to decay into such a hidden sector
through GUT suppressed operators, it can accommodate the recent cosmic ray
observations without over-producing antiprotons or interfering with the
attractive features of the thermal WIMP. Models of this kind are simple to
construct, generic and evade all astrophysical bounds. We provide tools for
constructing such models and present several distinct examples. The light
hidden spectrum and DM couplings can be probed in the near future, by measuring
astrophysical photon and neutrino fluxes. These indirect signatures are
complimentary to the direct production signals, such as lepton jets, predicted
by these models.Comment: 40 pages, 5 figure
Vacuum Ambiguity in de Sitter Space at Strong Coupling

It is well known that in the weak coupling regime, quantum field theories in
de Sitter space do not have a unique vacuum, but a class of vacua parametrized
by a complex parameter $\alpha$, i.e., the so-called $\alpha$-vacua. In this
article, using gauge/gravity duality, we calculate the symmetric two-point
function of strongly coupled ${\cal N}=4$ supersymmetric Yang-Mills theory on
$dS_3$. We find that there is a class of de Sitter invariant vacua,
parametrized by a set of complex parameters $\{\alpha_{\nu}\}$.Comment: 17 pages in JHEP style, references adde
Matrix Model Conjecture for Exact BS Periods and Nekrasov Functions

We give a concise summary of the impressive recent development unifying a
number of different fundamental subjects. The quiver Nekrasov functions
(generalized hypergeometric series) form a full basis for all conformal blocks
of the Virasoro algebra and are sufficient to provide the same for some
(special) conformal blocks of W-algebras. They can be described in terms of
Seiberg-Witten theory, with the SW differential given by the 1-point resolvent
in the DV phase of the quiver (discrete or conformal) matrix model
(\beta-ensemble), dS = ydz + O(\epsilon^2) = \sum_p \epsilon^{2p}
\rho_\beta^{(p|1)}(z), where \epsilon and \beta are related to the LNS
parameters \epsilon_1 and \epsilon_2. This provides explicit formulas for
conformal blocks in terms of analytically continued contour integrals and
resolves the old puzzle of the free-field description of generic conformal
blocks through the Dotsenko-Fateev integrals. Most important, this completes
the GKMMM description of SW theory in terms of integrability theory with the
help of exact BS integrals, and provides an extended manifestation of the basic
principle which states that the effective actions are the tau-functions of
integrable hierarchies.Comment: 14 page
Real-time correlators in warped AdS/CFT correspondence

We study real-time correlators in the warped AdS/CFT correspondence. We apply
the prescription used in the usual AdS/CFT correspondence and obtain the
retarded Green's functions for the scalar and vector fields in the spacelike
warped and the null warped black hole backgrounds. We find that the retarded
Green's functions and the cross sections are well consistent with the
predictions from dual CFT. Our results not only support strongly the
conjectured warped AdS/CFT correspondence, but also show that the usual
relativistic AdS/CFT prescription of obtaining the real-time correlators remain
effective in more general backgrounds with anisotropic conformal infinity.Comment: 27 page
The lift of type IIA supergravity with D6 sources: M-theory with torsion

This paper is concerned with an extension of the well known Kaluza-Klein
mechanism. As the standard ansatz for Kaluza-Klein reduction implies the
existence of a gauge potential associated with the KK field strength, it
follows immediately that this field strength satisfies its Bianchi identity.
Hence, the standard KK formalism breaks down in the presence of a violated
Bianchi identity. This occurs for example in the context of D6 sources.
  We will investigate and partially solve this problem in the context of the
type IIA/M-theory duality. Our discussion is motivated by the construction of
gauge/string duals with backreacting flavor branes using D6-branes, which
appear in M-theory as KK-monopoles. We are able to derive source-modified
equations of motion for the eleven-dimensional theory, and are subsequently
able to obtain the source-modified type IIA equations by direct dimensional
reduction.Comment: 25 pages plus appendices - As published in JHE
Phases of one dimensional large N gauge theory in a 1/D expansion

We consider large N Yang Mills theory with D adjoint scalar fields in d
dimensions for d=0 or 1. We show the existence of a non-trivial saddle point of
the functional integral at large D which is characterized by a mass gap for the
adjoint scalars. We integrate out the adjoint scalars in a 1/D expansion around
the saddle point. In case of one dimension which is regarded as a circle, this
procedure leads to an effective action for the Wilson line. We find an analogue
of the confinement/deconfinement transition which consists of a second order
phase transition from a uniform to a non-uniform eigenvalue distribution of the
Wilson line, closely followed by a Gross-Witten-Wadia transition where a gap
develops in the eigenvalue distribution. The phase transition can be regarded
as a continuation of a Gregory-Laflamme transition. Our methods involve large
values of the dimensionless 'tHooft coupling. The analysis in this paper is
quantitatively supported by earlier numerical work for D=9.Comment: 27 pages + 21 pages of Appendix; 8 figures, v2:some comments are
  added in sec.4.3, minor corrections, one reference added, v3: minor
  corrections, one reference added, version to be published in JHE
Tree Level Metastability and Gauge Mediation in Baryon Deformed SQCD

We investigate supersymmetric QCD with gauge group SU(2) and a baryon
deformation to the superpotential. The existence of an uplifted vacuum at the
origin with tree level metastability is demonstrated. When this model is
implemented in a direct gauge mediation scenario we therefore find gaugino
masses which are comparable to sfermion masses and parameterised by an
effective number of messengers 1/8. All deformations are well motivated by
appealing to the electric theory and an R-symmetry. This R-symmetry is
explicitly broken by the same term responsible for supersymmetry breaking.
Moreover, the model does not suffer from the Landau pole problem and we find
that it can be described in terms of just two scales: the weak scale and a high
scale like the Planck or GUT scale. The model can be tested by searching for
new particles at the TeV scale charged under the visible sector gauge group.Comment: 17 pages, 7 figures, updated reference
Chiral flavors and M2-branes at toric CY4 singularities

We extend the stringy derivation of N=2 AdS4/CFT3 dualities to cases where
the M-theory circle degenerates at complex codimension-two submanifolds of a
toric conical CY4. The type IIA backgrounds include D6-branes, and the dual N=2
quiver gauge theories contain chiral flavors. We provide a general recipe to
derive the geometric moduli space of flavored versions of Abelian toric quiver
gauge theories. The CY4 cone is reproduced thanks to a non-trivial quantum
F-term relation between diagonal monopole operators and bifundamental fields.
We find new field theory duals to many geometries, including Q111.Comment: 59 pages, 34 figures; changed notation, typos corrected and
  references added; minor changes, published versio
Black Hole Hair Removal: Non-linear Analysis

BMPV black holes in flat transverse space and in Taub-NUT space have
identical near horizon geometries but different microscopic degeneracies. It
has been proposed that this difference can be accounted for by different
contribution to the degeneracies of these black holes from hair modes, --
degrees of freedom living outside the horizon. In this paper we explicitly
construct the hair modes of these two black holes as finite bosonic and
fermionic deformations of the black hole solution satisfying the full
non-linear equations of motion of supergravity and preserving the supersymmetry
of the original solutions. Special care is taken to ensure that these solutions
do not have any curvature singularity at the future horizon when viewed as the
full ten dimensional geometry. We show that after removing the contribution due
to the hair degrees of freedom from the microscopic partition function, the
partition functions of the two black holes agree.Comment: 40 pages, LaTe
On Non-linear Action for Gauged M2-brane

We propose a non-linear extension of U(1) \times U(1) (abelian) ABJM model
including T_{M2} (higher derivative) corrections. The action proposed here is
expected to describe a single M2-brane proving C^4/Z_k target space. The model
includes couplings with the 3-form background in the eleven-dimensional
supergravity which is consistent with the orbifold projection. We show that the
novel higgs mechanism proposed by Mukhi and Papageorgakis does work even in the
presence of higher derivative corrections and couplings with the background
field, giving the correct structure of the Dirac-Born-Infeld action with
Wess-Zumino term for a D2-brane. We also find half BPS solutions in the full
non-linear theory which is interpreted as an another M2-brane intersecting with
the original M2-brane. A possible generalization to U(N) \times U(N) gauge
group is briefly discussed.Comment: 19 pages, no figure, references added, typos correcte
Distributions of charged massive scalars and fermions from evaporating
  higher-dimensional black holes

A detailed numerical analysis is performed to obtain the Hawking spectrum for
charged, massive brane scalars and fermions on the approximate background of a
brane charged rotating higher-dimensional black hole constructed in
arXiv:0907.5107. We formulate the problem in terms of a "spinor-like" first
order system of differential wave equations not only for fermions, but for
scalars as well and integrate it numerically. Flux spectra are presented for
non-zero mass, charge and rotation, confirming and extending previous results
based on analytic approximations. In particular we describe an inverted charge
splitting at low energies, which is not present in four or five dimensions and
increases with the number of extra dimensions. This provides another signature
of the evaporation of higher-dimensional black holes in TeV scale gravity
scenarios.Comment: 19 pages, 6 figures, minor typos corrected, 1 page added with a
  discussion on higher spins, added reference
P-odd and CP-odd Four-Quark Contributions to Neutron EDM

In a class of beyond-standard-model theories, CP-odd observables, such as the
neutron electric dipole moment, receive significant contributions from
flavor-neutral P-odd and CP-odd four-quark operators. However, considerable
uncertainties exist in the hadronic matrix elements of these operators strongly
affecting the experimental constraints on CP-violating parameters in the
theories. Here we study their hadronic matrix elements in combined chiral
perturbation theory and nucleon models. We first classify the operators in
chiral representations and present the leading-order QCD evolutions. We then
match the four-quark operators to the corresponding ones in chiral hadronic
theory, finding symmetry relations among the matrix elements. Although this
makes lattice QCD calculations feasible, we choose to estimate the
non-perturbative matching coefficients in simple quark models. We finally
compare the results for the neutron electric dipole moment and P-odd and CP-odd
pion-nucleon couplings with the previous studies using naive factorization and
QCD sum rules. Our study shall provide valuable insights on the present
hadronic physics uncertainties in these observables.Comment: 40 pages, 7 figures. This is the final version. A discussion of the
  uncertainty of the calculation is adde
Classical and Quantum Equations of Motion for a BTZ Black String in AdS
  Space

We investigate gravitational collapse of a $(3+1)$-dimensional BTZ black
string in AdS space in the context of both classical and quantum mechanics.
This is done by first deriving the conserved mass per unit length of the
cylindrically symmetric domain wall, which is taken as the classical
Hamiltonian of the black string. In the quantum mechanical context, we take
primary interest in the behavior of the collapse near the horizon and near the
origin (classical singularity) from the point of view of an infalling observer.
In the absence of radiation, quantum effects near the horizon do not change the
classical conclusions for an infalling observer, meaning that the horizon is
not an obstacle for him/her. The most interesting quantum mechanical effect
comes in when investigating near the origin. First, quantum effects are able to
remove the classical singularity at the origin, since the wave function is
non-singular at the origin. Second, the Schr\"odinger equation describing the
behavior near the origin displays non-local effects, which depend on the energy
density of the domain wall. This is manifest in that derivatives of the
wavefunction at one point are related to the value of the wavefunction at some
other distant point.Comment: 9 pages, 1 figure. Minor Clarification and corrections. Accepted for
  Publication in JHE
Higgs boson enhancement effects on squark-pair production at the LHC

We study the Higgs boson effects on third-generation squark-pair production
in proton-proton collision at the CERN Large Hadron Collider (LHC), including
$\Stop \Stop^*$, $\Stop\Sbot^*$, and $\Sbot \Sbot^*$. We found that substantial
enhancement can be obtained through s-channel exchanges of Higgs bosons at
large $\tan\beta$, at which the enhancement mainly comes from $b\bar b$, $b\bar
c$, and $c\bar b$ initial states. We compute the complete set of electroweak
(EW) contributions to all production channels. This completes previous
computations in the literature. We found that the EW contributions can be
significant and can reach up to 25% in more general scenarios and at the
resonance of the heavy Higgs boson. The size of Higgs enhancement is comparable
or even higher than the PDF uncertainties and so must be included in any
reliable analysis. A full analytical computation of all the EW contributions is
presented.Comment: 23 pages, 7 figures, 1 tabl
Topological Interactions in Warped Extra Dimensions

Topological interactions will be generated in theories with compact extra
dimensions where fermionic chiral zero modes have different localizations. This
is the case in many warped extra dimension models where the right-handed top
quark is typically localized away from the left-handed one. Using
deconstruction techniques, we study the topological interactions in these
models. These interactions appear as trilinear and quadrilinear gauge boson
couplings in low energy effective theories with three or more sites, as well as
in the continuum limit. We derive the form of these interactions for various
cases, including examples of Abelian, non-Abelian and product gauge groups of
phenomenological interest. The topological interactions provide a window into
the more fundamental aspects of these theories and could result in unique
signatures at the Large Hadron Collider, some of which we explore.Comment: 40 pages, 10 figures, 2 tables; modifications in the KK parity
  discussion, final version at JHE