pinecone/core-2020-05-10-deduplication huggingface dataset:
Mass deformation of twisted super Yang-Mills theory with fuzzy sphere
  solution

We investigate mass deformation of twisted superalgebra of U(N) super
Yang-Mills (SYM) theories in several models and in several dimensions,
motivated by the method formulated in [1]. We show that there are several ways
to perform the deformation, if a model possesses four scalar supercharges
except for two dimensional B-model. We also evaluate classical vacuum solutions
of the potentials of scalar fields for each model. We then find that it is
always possible to find fuzzy sphere solution in the theories.Comment: 30 pages. One paragraph changed in the introduction and some
  references adde
Geometric construction of D-branes in WZW models

The geometric description of D-branes in WZW models is pushed forward. Our
starting point is a gluing condition\, $J_{+}=FJ_-$ that matches the model's
chiral currents at the worldsheet boundary through a linear map $F$ acting on
the WZW Lie algebra. The equivalence of boundary and gluing conditions of this
type is studied in detail. The analysis involves a thorough discussion of
Frobenius integrability, shows that $F$ must be an isometry, and applies to
both metrically degenerate and nondegenerate D-branes. The isometry $F$ need
not be a Lie algebra automorphism nor constantly defined over the brane. This
approach, when applied to isometries of the form $F=R$ with $R$ a constant Lie
algebra automorphism, validates metrically degenerate $R$-twined conjugacy
classes as D-branes. It also shows that no D-branes exist in semisimple WZW
models for constant\, $F=-R$.Comment: 23 pages, discussion of limitations of the gluing condition approach
  adde
Brane-world black holes and the scale of gravity

A particle in four dimensions should behave like a classical black hole if
the horizon radius is larger than the Compton wavelength or, equivalently, if
its degeneracy (measured by entropy in units of the Planck scale) is large. For
spherically symmetric black holes in 4 + d dimensions, both arguments again
lead to a mass threshold MC and degeneracy scale Mdeg of the order of the
fundamental scale of gravity MG. In the brane-world, deviations from the
Schwarzschild metric induced by bulk effects alter the horizon radius and
effective four-dimensional Euclidean action in such a way that MC \simeq Mdeg
might be either larger or smaller than MG. This opens up the possibility that
black holes exist with a mass smaller than MG and might be produced at the LHC
even if M>10 TeV, whereas effects due to bulk graviton exchanges remain
undetectable because suppressed by inverse powers of MG. Conversely, even if
black holes are not found at the LHC, it is still possible that MC>MG and MG
\simeq 1TeV.Comment: 4 pages, no figur
Flavor SU(3) symmetry and QCD factorization in $B \to PP$ and $PV$
  decays

Using flavor SU(3) symmetry, we perform a model-independent analysis of
charmless $\bar B_{u,d} (\bar B_s) \to PP, ~PV$ decays. All the relevant
topological diagrams, including the presumably subleading diagrams, such as the
QCD- and EW-penguin exchange diagrams and flavor-singlet weak annihilation
ones, are introduced. Indeed, the QCD-penguin exchange diagram turns out to be
important in understanding the data for penguin-dominated decay modes. In this
work we make efforts to bridge the (model-independent but less quantitative)
topological diagram or flavor SU(3) approach and the (quantitative but somewhat
model-dependent) QCD factorization (QCDF) approach in these decays, by
explicitly showing how to translate each flavor SU(3) amplitude into the
corresponding terms in the QCDF framework. After estimating each flavor SU(3)
amplitude numerically using QCDF, we discuss various physical consequences,
including SU(3) breaking effects and some useful SU(3) relations among decay
amplitudes of $\bar B_s \to PV$ and $\bar B_d \to PV$.Comment: 47 pages, 3 figures, 28 table
Scalar and vector mesons of flavor chiral symmetry breaking in the
  Klebanov-Strassler background

Recently, Dymarsky, Kuperstein and Sonnenschein constructed an embedding of
flavor D7- and anti-D7-branes in the Klebanov-Strassler geometry that breaks
the supersymmetry of the background, yet is stable. In this article, we study
in detail the spectrum of vector mesons in this new model of flavor chiral
symmetry breaking and commence an analytical analysis of the scalar mesons in
this setup.Comment: v1: 35 pages, 5 figures, 4 tables, includes self-contained review of
  DKS construction; v2: corrected signs in eqs. (2.22) and (2.23), improved
  discussion of scalar mesons in section 3.2; v3: major revision of the results
  on scalar mesons, version submitted to JHEP; v4: version accepted by JHE
Supersymmetric Monojets at the Large Hadron Collider

Supersymmetric monojets may be produced at the Large Hadron Collider by the
process qg -> squark neutralino_1 -> q neutralino_1 neutralino_1, leading to a
jet recoiling against missing transverse momentum. We discuss the feasibility
and utility of the supersymmetric monojet signal. In particular, we examine the
possible precision with which one can ascertain the neutralino_1-squark-quark
coupling via the rate for monojet events. Such a coupling contains information
on the composition of the neutralino_1 and helps bound dark matter direct
detection cross-sections and the dark matter relic density of the neutralino_1.
It also provides a check of the supersymmetric relation between gauge couplings
and gaugino-quark-squark couplings.Comment: 46 pages, 10 figures. The appendix has been rewritten to correct an
  error that appears in all previous versions of the appendix. This error has
  no effect on the results in the main body of the pape
Tailoring Three-Point Functions and Integrability II. Weak/strong
  coupling match

We compute three-point functions of single trace operators in planar N=4 SYM.
We consider the limit where one of the operators is much smaller than the other
two. We find a precise match between weak and strong coupling in the
Frolov-Tseytlin classical limit for a very general class of classical
solutions. To achieve this match we clarify the issue of back-reaction and
identify precisely which three-point functions are captured by a classical
computation.Comment: 36 pages. v2: figure added, references adde
On-shell superamplitudes in N<4 SYM

We present an on-shell formalism for superamplitudes of pure N<4 super
Yang-Mills theory. Two superfields, Phi and Phi^+, are required to describe the
two CPT conjugate supermultiplets. Simple truncation prescriptions allow us to
derive explicit tree-level MHV and NMHV superamplitudes with N-fold SUSY. Any
N=0,1,2 tree superamplitudes have large-z falloffs under super-BCFW shifts,
except under [Phi,Phi^+>-shifts. We show that this `bad' shift is responsible
for the bubble contributions to 1-loop amplitudes in N=0,1,2 SYM. We evaluate
the MHV bubble coefficients in a manifestly supersymmetric form and demonstrate
for the case of four external particles that the sum of bubble coefficients is
equal to minus the tree superamplitude times the 1-loop beta-function
coefficient. The connection to the beta-function is expected since only bubble
integrals capture UV divergences; we discuss briefly how the minus sign arises
from UV and IR divergences in dimensional regularization. Other applications of
the on-shell formalism include a solution to the N^{K}MHV N=1 SUSY Ward
identities and a clear description of the connection between 6d superamplitudes
and the 4d ones for both N=4 and N=2 SYM. We outline extensions to N<8
supergravity.Comment: 37 pages, 4 figure
Thermodynamic Bubble Ansatz

Motivated by the computation of scattering amplitudes at strong coupling, we
consider minimal area surfaces in AdS_5 which end on a null polygonal contour
at the boundary. We map the classical problem of finding the surface into an
SU(4) Hitchin system. The polygon with six edges is the first non-trivial
example. For this case, we write an integral equation which determines the area
as a function of the shape of the polygon. The equations are identical to those
of the Thermodynamics Bethe Ansatz. Moreover, the area is given by the free
energy of this TBA system. The high temperature limit of the TBA system can be
exactly solved. It leads to an explicit expression for a special class of
hexagonal contours.Comment: 55 pages, 22 figures. v2: references added, V3: small typo fixe
A New 2d/4d Duality via Integrability

We prove a duality, recently conjectured in arXiv:1103.5726, which relates
the F-terms of supersymmetric gauge theories defined in two and four dimensions
respectively. The proof proceeds by a saddle point analysis of the
four-dimensional partition function in the Nekrasov-Shatashvili limit. At
special quantized values of the Coulomb branch moduli, the saddle point
condition becomes the Bethe Ansatz Equation of the SL(2) Heisenberg spin chain
which coincides with the F-term equation of the dual two-dimensional theory.
The on-shell values of the superpotential in the two theories are shown to
coincide in corresponding vacua. We also identify two-dimensional duals for a
large set of quiver gauge theories in four dimensions and generalize our proof
to these cases.Comment: 19 pages, 2 figures, minor corrections and references adde
Thermodynamics of deformed AdS$_5$ model with a positive/negative
  quadratic correction in graviton-dilaton system

By solving the Einstein equations of the graviton coupling with a real scalar
dilaton field, we establish a general framework to self-consistently solve the
geometric background with black-hole for any given phenomenological holographic
models. In this framwork, we solve the black-hole background, the corresponding
dilaon field and the dilaton potential for the deformed AdS$_5$ model with a
positive/negative quadratic correction. We systematically investigate the
thermodynamical properties of the deformed AdS$_5$ model with a positive and
negative quadratic correction, respectively, and compare with lattice QCD on
the results of the equation of state, the heavy quark potential, the Polyakov
loop and the spatial Wilson loop. We find that the bulk thermodynamical
properties are not sensitive to the sign of the quadratic correction, and the
results of both deformed holographic QCD models agree well with lattice QCD
result for pure SU(3) gauge theory. However, the results from loop operators
favor a positive quadratic correction, which agree well with lattice QCD
result. Especially, the result from the Polyakov loop excludes the model with a
negative quadratic correction in the warp factor of ${\rm AdS}_5$.Comment: 26 figures,36 pages,V.3: an appendix,more equations and references
  added,figures corrected,published versio
On graviton non-Gaussianities during inflation

We consider the most general three point function for gravitational waves
produced during a period of exactly de Sitter expansion. The de Sitter
isometries constrain the possible shapes to only three: two preserving parity
and one violating parity. These isometries imply that these correlation
functions should be conformal invariant. One of the shapes is produced by the
ordinary gravity action. The other shape is produced by a higher derivative
correction and could be as large as the gravity contribution. The parity
violating shape does not contribute to the bispectrum [1106.3228, 1108.0175],
even though it is present in the wavefunction. We also introduce a spinor
helicity formalism to describe de Sitter gravitational waves with circular
polarization. These results also apply to correlation functions in Anti-de
Sitter space. They also describe the general form of stress tensor correlation
functions, in momentum space, in a three dimensional conformal field theory.
Here all three shapes can arise, including the parity violating one.Comment: 51 pages, v2: Corrected statement about parity violation in the
  gravitational wave bispectrum. Some other changes and references adde
IIB black hole horizons with five-form flux and extended supersymmetry

We classify under some assumptions the IIB black hole horizons with 5-form
flux preserving more than 2 supersymmetries. We find that the spatial horizon
sections with non-vanishing flux preserving 4 supersymmetries are locally
isometric either to S^1 * S^3 * T^4 or to S^1 * S^3 * K_3 and the associated
near horizon geometries are locally isometric to AdS_3 * S^3 * T^4 and AdS_3 *
S^3 * K_3$, respectively. The near horizon geometries preserving more than 4
supersymmetries are locally isometric to R^{1,1} * T^8.Comment: 16 pages, latex. Minor typos correcte
Discriminating Top-Antitop Resonances using Azimuthal Decay Correlations

Top-antitop pairs produced in the decay of a new heavy resonance will exhibit
spin correlations that contain valuable coupling information. When the tops
decay, these correlations imprint themselves on the angular patterns of the
final quarks and leptons. While many approaches to the measurement of top spin
correlations are known, the most common ones require detailed kinematic
reconstructions and are insensitive to some important spin interference
effects. In particular, spin-1 resonances with mostly-vector or mostly-axial
couplings to top cannot be easily discriminated from one another without
appealing to mass-suppressed effects or to more model-dependent interference
with continuum Standard Model production. Here, we propose to probe the
structure of a resonance's couplings to tops by measuring the azimuthal angles
of the tops' decay products about the production axis. These angles exhibit
modulations which are typically O(0.1-1), and which by themselves allow for
discrimination of spin-0 from higher spins, measurement of the CP-phase for
spin-0, and measurement of the vector/axial composition for spins 1 and 2. For
relativistic tops, the azimuthal decay angles can be well-approximated without
detailed knowledge of the tops' velocities, and appear to be robust against
imperfect energy measurements and neutrino reconstructions. We illustrate this
point in the highly challenging dileptonic decay mode, which also exhibits the
largest modulations. We comment on the relevance of these observables for
testing axigluon-like models that explain the top quark A_FB anomaly at the
Tevatron, through direct production at the LHC.Comment: 24 pages plus appendices, 6 figures. v2: added references, updated
  AFB model, expanded discussion of SM interference for spin-0 particl
Chiral Symmetry Restoration in Holographic Noncommutative QCD

We consider the noncommutative deformation of the Sakai--Sugimoto model at
finite temperature and finite baryon chemical potential. The space
noncommutativity is possible to have an influence on the flavor dynamics of the
QCD. The critical temperature and critical value of the chemical potential are
modified by the space noncommutativity. The influence of the space
noncommutativity on the flavor dynamics of the QCD is caused by the
Wess--Zumino term in the effective action of the D8-branes. The intermediate
temperature phase, in which the gluons deconfine but the chiral symmetry
remains broken, is easy to be realized in some region of the noncommutativity
parameter.Comment: 20 pages, 8 figures; v2: minor corrections and improvements,
  conclusions unchanged; v3: minor corrections, version accepted for
  publication in JHE
W and Z/γ∗ boson production in association with a bottom-antibottom pair

We present a study of ell ν bbar{b} and {ell+ }{ell- }bbar{b} production at hadron colliders. Our results, accurate to the next-to-leading order in QCD, are based on automatic matrix-element calculations performed by M adLoop and M adFKS, and are given at both the parton level, and after the matching with the H erwig event generator, achieved with aMC@NLO. We retain the complete dependence on the bottom-quark mass, and include exactly all spin correlations of final-state leptons. We discuss the cases of several observables at the LHC which highlight the importance of accurate simulations
Gauss-Bonnet Black Holes and Heavy Fermion Metals

We consider charged black holes in Einstein-Gauss-Bonnet Gravity with
Lifshitz boundary conditions. We find that this class of models can reproduce
the anomalous specific heat of condensed matter systems exhibiting
non-Fermi-liquid behaviour at low temperatures. We find that the temperature
dependence of the Sommerfeld ratio is sensitive to the choice of Gauss-Bonnet
coupling parameter for a given value of the Lifshitz scaling parameter. We
propose that this class of models is dual to a class of models of
non-Fermi-liquid systems proposed by Castro-Neto et.al.Comment: 17 pages, 6 figures, pdfLatex; small corrections to figure 10 in this
  versio
Measurement of Wγ and Zγ production in proton-proton collisions at √s = 7 TeV with the ATLAS detector

Artículo escrito por un elevado número de autores, solo se referencian el que aparece en primer lugar, el nombre del grupo de colaboración, si le hubiere, y los autores pertenecientes a la UAMJournal of High Energy Physics 2011.9 (2011): 072 reproduced by permission of Scuola Internazionale Superiore di Studi Avanzati (SISSA)We present studies of W and Z bosons with associated high energy photons produced in pp collisions at √s = 7TeV. The analysis uses 35 pb -1 of data collected by the ATLAS experiment in 2010. The event selection requires W and Z bosons decaying into high pT leptons (electrons or muons) and a photon with ET > 15 GeV separated from the lepton(s) by a distance ΔR(l, γ ) > 0.7 in η-φ space. A total of 95 (97) pp → e±vy + X (pp →μ± νγ + X) and 25 (23) pp → e+e-γ + X (pp → μ+μ -γ + X) event candidates are selected. The kinematic distributions of the leptons and photons and the production cross sections are measured. The data are found to agree with Standard Model predictions that include next-to-leading-order O(ααs) contribution
Theoretical constraints on brane inflation and cosmic superstring
  radiation

We analyze theoretical constraints on the consistency of brane inflation
leading to cosmic superstring formation and on the subsequent radiation of
these cosmic superstrings. We first investigate the implications of recently
elucidated supergravity constraints on models of brane inflation. We show that
both D3/D7 and D3/anti-D3 brane inflation are subject to non-trivial
constraints. Both models can be shown to satisfy those constraints, but for the
case of D3/D7 there may be important consequences for the inflationary
mechanism. We then analyze the strong theoretical constraints on the types of
allowed radiation by cosmic superstrings, should they be formed; such
constraints do not apply to their field theoretical analogues. We argue that in
a warped background where one might expect axionic radiation to be enhanced
relative to gravitational radiation, neithe F-strings nor D-strings can emit
axionic radiation, while FD-strings cannot give rise to
Neveu-Schwarz--Neveu-Schwarz particle emission, and their Ramond-Ramond
particle emission is not well-defined.Comment: 26 pages. v3: Minor corrections: footnote and reference added, and
  minor argument clarifie
On topological field theory representation of higher analogs of
  classical special functions

Looking for a quantum field theory model of Archimedean algebraic geometry a
class of infinite-dimensional integral representations of classical special
functions was introduced. Precisely the special functions such as Whittaker
functions and Gamma-function were identified with correlation functions in
topological field theories on a two-dimensional disk. Mirror symmetry of the
underlying topological field theory leads to a dual finite-dimensional integral
representations reproducing classical integral representations for the
corresponding special functions. The mirror symmetry interchanging infinite-
and finite-dimensional integral representations provides an incarnation of the
local Archimedean Langlands duality on the level of classical special
functions. In this note we provide some directions to higher-dimensional
generalizations of our previous results. In the first part we consider
topological field theory representations of multiple local L-factors introduced
by Kurokawa and expressed through multiple Barnes's Gamma-functions. In the
second part we are dealing with generalizations based on consideration of
topological Yang-Mills theories on non-compact four-dimensional manifolds.
Presumably, in analogy with the mirror duality in two-dimensions, S-dual
description should be instrumental for deriving integral representations for a
particular class of quantum field theory correlation functions and thus
providing a new interesting class of special functions supplied with canonical
integral representations.Comment: 21 pages, typos are fixed and important reference is adde
Worldsheet Supersymmetry of Pohlmeyer-Reduced AdS_n x S^n Superstrings

As was observed by Grigoriev and Tseytlin, the Pohlmeyer-reduced AdS_2 x S^2
superstring theory possesses N=(2,2) worldsheet supersymmetry. We show, at the
classical level, that the AdS_3 x S^3 and AdS_5 x S^5 superstring theories in
the Pohlmeyer-reduced form reveal hidden N=(4,4) and N=(8,8) worldsheet
supersymmetries. Our consideration is based on the modified mass-deformed
gauged WZW action for the superstring equations. We present the explicit form
of the supersymmetry transformations for both the off-shell action and the
superstring equations. The characteristic feature of these transformations is
the presence of non-local terms.Comment: 1+18 pages, minor corrections, published versio
Holographic Roberge-Weiss Transitions II: Defect Theories and the
  Sakai-Sugimoto Model

We extend the work of Aarts et al., including an imaginary chemical potential
for quark number into the Sakai-Sugimoto model and codimension k defect
theories. The phase diagram of these models are a function of three parameters,
the temperature, chemical potential and the asymptotic separation of the
flavour branes, related to a mass for the quarks in the boundary theories. We
compute the phase diagrams and the pressure due to the flavours of the theories
as a function of these parameters and show that there are Roberge-Weiss
transitions in the high temperature phases, chiral symmetry restored for the
Sakai-Sugimoto model and deconfined for the defect models, while at low
temperatures there are no Roberge-Weiss transitions. In all the models we
consider the transitions between low and high temperature phases are first
order, hence the points where they meet the Roberge-Weiss lines are triple
points. The pressure for the defect theories scales in the way we expect from
dimensional analysis while the Sakai-Sugimoto model exhibits unusual scaling.
We show that the models we consider are analytic in \mu^2 when \mu^2 is small.Comment: 39 pages, 12 figures. references added, Sakai-Sugimoto section
  revised, version to appear in JHE
Diagnosing Spin at the LHC via Vector Boson Fusion

We propose a new technique for determining the spin of new massive particles
that might be discovered at the Large Hadron Collider. The method relies on
pair-production of the new particles in a kinematic regime where the vector
boson fusion production mechanism is enhanced. For this regime, we show that
the distribution of the leading jets as a function of their relative azimuthal
angle can be used to distinguish spin-0 from spin-1/2 particles. We illustrate
this effect by considering the particular cases of (i) strongly-interacting,
stable particles and (ii) supersymmetric particles carrying color charge. We
argue that this method should be applicable in a wide range of new physics
scenarios.Comment: 5 pages, 4 figure