pinecone/core-2020-05-10-deduplication huggingface dataset:
Hitting sbottom in natural SUSY

We compare the experimental prospects of direct stop and sbottom pair
production searches at the LHC. Such searches for stops are of great interest
as they directly probe for states that are motivated by the SUSY solution to
the hierarchy problem of the Higgs mass parameter - leading to a "Natural" SUSY
spectrum. Noting that sbottom searches are less experimentally challenging and
scale up in reach directly with the improvement on b-tagging algorithms, we
discuss the interplay of small TeV scale custodial symmetry violation with
sbottom direct pair production searches as a path to obtaining strong sub-TeV
constraints on stops in a natural SUSY scenario. We argue that if a weak scale
natural SUSY spectrum does not exist within the reach of LHC, then hopes for
such a spectrum for large regions of parameter space should sbottom out.
Conversely, the same arguments make clear that a discovery of such a spectrum
is likely to proceed in a sbottom up manner.Comment: 18 pages, 8 figures,v2 refs added, JHEP versio
Exact Results for 't Hooft Loops in Gauge Theories on S^4

The path integral of a general N=2 supersymmetric gauge theory on S^4 is
exactly evaluated in the presence of a supersymmetric 't Hooft loop operator.
The result we find - obtained using localization techniques - captures all
perturbative quantum corrections as well as non-perturbative effects due to
instantons and monopoles, which are supported at the north pole, south pole and
equator of S^4. As a by-product, our gauge theory calculations successfully
confirm the predictions made for 't Hooft loops obtained from the calculation
of topological defect correlators in Liouville/Toda conformal field theory.Comment: 86 pages, LaTe
Black hole free energy during charged collapse: a numerical study

We perform a numerical investigation of the thermodynamics during the
collapse of a charged (complex) scalar field to a Reissner-Nordstr\"om (RN)
black hole in isotropic coordinates. Numerical work on gravitational collapse
in isotropic coordinates has recently shown that the negative of the total
Lagrangian approaches the Helmholtz free energy F= E-TS of a Schwarzschild
black hole at late times of the collapse (where E is the black hole mass, T the
temperature and S the entropy). The relevant thermodynamic potential for the RN
black hole is the Gibbs free energy G=E-TS-$\Phi_H$ Q where Q is the charge and
$\Phi_H$ the electrostatic potential at the outer horizon. In charged collapse,
there is a large outgoing matter wave which prevents the exterior from settling
quickly to a static state. However, the interior region is not affected
significantly by the wave. We find numerically that the interior contribution
to the Gibbs free energy is entirely gravitational and accumulates in a thin
shell just inside the horizon. The entropy is gravitational in origin and one
observes dynamically that it resides on the horizon. We also compare the
numerical value of the interior Lagrangian to the expected analytical value of
the interior Gibbs free energy for different initial states and we find that
they agree to within 10-13%. The two values are approaching each other so that
their difference decreases with more evolution time.Comment: 35 pages, 12 figures, 3 tables. version to appear in JHE
Quivers, YBE and 3-manifolds

We study 4d superconformal indices for a large class of N=1 superconformal
quiver gauge theories realized combinatorially as a bipartite graph or a set of
"zig-zag paths" on a two-dimensional torus T^2. An exchange of loops, which we
call a "double Yang-Baxter move", gives the Seiberg duality of the gauge
theory, and the invariance of the index under the duality is translated into
the Yang-Baxter-type equation of a spin system defined on a "Z-invariant"
lattice on T^2. When we compactify the gauge theory to 3d, Higgs the theory and
then compactify further to 2d, the superconformal index reduces to an integral
of quantum/classical dilogarithm functions. The saddle point of this integral
unexpectedly reproduces the hyperbolic volume of a hyperbolic 3-manifold. The
3-manifold is obtained by gluing hyperbolic ideal polyhedra in H^3, each of
which could be thought of as a 3d lift of the faces of the 2d bipartite
graph.The same quantity is also related with the thermodynamic limit of the BPS
partition function, or equivalently the genus 0 topological string partition
function, on a toric Calabi-Yau manifold dual to quiver gauge theories. We also
comment on brane realization of our theories. This paper is a companion to
another paper summarizing the results.Comment: 61 pages, 16 figures; v2: typos correcte
Radion Dynamics and Phenomenology in the Linear Dilaton Model

We investigate the properties of the radion in the 5D linear dilaton model
arising from Little String Theory. A Goldberger-Wise type mechanism is used to
stabilise a large interbrane distance, with the dilaton now playing the role of
the stabilising field. We consider the coupled fluctuations of the metric and
dilaton fields and identify the physical scalar modes of the system. The
wavefunctions and masses of the radion and Kaluza-Klein modes are calculated,
giving a radion mass of order the curvature scale. As a result of the direct
coupling between the dilaton and Standard Model fields, the radion couples to
the SM Lagrangian, in addition to the trace of the energy-momentum tensor. The
effect of these additional interaction terms on the radion decay modes is
investigated, with a notable increase in the branching fraction to photons. We
also consider the effects of a non-minimal Higgs coupling to gravity, which
introduces a mixing between the Higgs and radion modes. Finally, we calculate
the production cross section of the radion at the LHC and use the current Higgs
searches to place constraints on the parameter space.Comment: 28 pages, 7 figures; v2: error in radion-gauge boson Feynman rules
  corrected, version published in JHE
Constraints on the pMSSM from searches for squarks and gluinos by ATLAS

We study the impact of the jets and missing transverse momentum SUSY analyses
of the ATLAS experiment on the phenomenological MSSM (pMSSM). We investigate
sets of SUSY models with a flat and logarithmic prior in the SUSY mass scale
and a mass range up to 1 and 3 TeV, respectively. These models were found
previously in the study 'Supersymmetry without Prejudice'. Removing models with
long-lived SUSY particles, we show that 99% of 20000 randomly generated pMSSM
model points with a flat prior and 87% for a logarithmic prior are excluded by
the ATLAS results. For models with squarks and gluinos below 600 GeV all models
of the pMSSM grid are excluded. We identify SUSY spectra where the current
ATLAS search strategy is less sensitive and propose extensions to the inclusive
jets search channel
Operator Counting for N=2 Chern-Simons Gauge Theories with Chiral-like
  Matter Fields

The localization formula of Chern-Simons quiver gauge theory on $S^3$ nicely
reproduces the geometric data such as volume of Sasaki-Einstein manifolds in
the large-$N$ limit, at least for vector-like models. The validity of
chiral-like models is not established yet, due to technical problems in both
analytic and numerical approaches. Recently Gulotta, Herzog and Pufu suggested
that the counting of chiral operators can be used to find the eigenvalue
distribution of quiver matrix models. In this paper we apply this method to
some vector-like or chiral-like quiver theories, including the triangular
quivers with generic Chern-Simons levels which are dual to in-homogeneous
Sasaki-Einstein manifolds $Y^{p,k}(\mathbb{CP}^2)$. The result is consistent
with AdS/CFT and the volume formula. We discuss the implication of our
analysis.Comment: 23 pages; v2. revised version; v3. corrected typos and clarified
  argument
Analytic study of Gauss-Bonnet holographic superconductors in
  Born-Infeld electrodynamics

Using Sturm-Liouville (SL) eigenvalue problem, we investigate several
properties of holographic s-wave superconductors in Gauss-Bonnet gravity with
Born-Infeld electrodynamics in the probe limit. Our analytic scheme has been
found to be in good agreement with the numerical results. From our analysis it
is quite evident that the scalar hair formation at low temperatures is indeed
affected by both the Gauss-Bonnet as well as the Born-Infeld coupling
parameters. We also compute the critical exponent associated with the
condensation near the critical temperature. The value of the critical exponent
thus obtained indeed suggests a universal mean field behavior.Comment: 9 pages, Latex, minor modifications, To appear in JHE
Saturating the unitarity bound in AdS/CFT_(AdS)

We investigate the holographic description of CFTs defined on the cylinder
and on AdS, which include an operator saturating the unitarity bound. The
standard Klein-Gordon field with the corresponding mass and boundary conditions
on global AdS_(d+1) and on an AdS_(d+1) geometry with AdS_d conformal boundary
contains ghosts. We identify a limit in which the singleton field theory is
obtained from the bulk theory with standard renormalized inner product, showing
that a unitary bulk theory corresponding to an operator which saturates the
unitarity bound can be formulated and that this yields a free field on the
boundary. The normalizability issues found for the standard Klein-Gordon field
on the geometry with AdS_d conformal boundary are avoided for the singleton
theory, which offers interesting prospects for multi-layered AdS/CFT.Comment: 7 pages, 1 figur
Black Hole Bound State Metamorphosis

N=4 supersymmetric string theories contain negative discriminant states whose
numbers are known precisely from microscopic counting formulae. On the
macroscopic side, these results can be reproduced by regarding these states as
multi-centered black hole configurations provided we make certain
identification of apparently distinct multi-centered black hole configurations
according to a precise set of rules. In this paper we provide a physical
explanation of such identifications, thereby establishing that multi-centered
black hole configurations reproduce correctly the microscopic results for the
number of negative discriminant states without any ad hoc assumption.Comment: LaTex file, 30 page
Excited spectroscopy of charmed mesons from lattice QCD

We present spectra of highly excited D and Ds mesons up to around 3.8 GeV
determined using dynamical lattice QCD. We employ novel computational
techniques and the variational method with a large basis of carefully
constructed operators in order to extract and reliably identify the continuum
spin of an extensive set of excited states. These include states with high spin
and states identified as having an explicit gluonic contribution. Calculations
were performed on two volumes, both with a pion mass of approximately 400 MeV,
achieving a high statistical precision for both ground and excited states. We
discuss our results in light of experimental observations, comment on the
phenomenological implications and identify the lightest `supermultiplet' of
hybrid mesons in each sector.Comment: 26 pages, 10 figure
SO(2N) and SU(N) gauge theories in 2+1 dimensions

We perform an exploratory investigation of how rapidly the physics of SO(2N)
gauge theories approaches its N=oo limit. This question has recently become
topical because SO(2N) gauge theories are orbifold equivalent to SU(N) gauge
theories, but do not have a finite chemical potential sign problem. We consider
only the pure gauge theory and, because of the inconvenient location of the
lattice strong-to-weak coupling 'bulk' transition in 3+1 dimensions, we largely
confine our numerical calculations to 2+1 dimensions. We discuss analytic
expectations in both D=2+1 and D=3+1, show that the SO(6) and SU(4) spectra do
indeed appear to be the same, and show that a number of mass ratios do indeed
appear to agree in the large-N limit. In particular SO(6) and SU(3) gauge
theories are quite similar except for the values of the string tension and
coupling, both of which differences can be readily understood.Comment: 27 pages, 9 figure
Bosonization, Singularity Analysis, Nonlocal Symmetry Reductions and
  Exact Solutions of Supersymmetric KdV Equation

Assuming that there exist at least two fermionic parameters, the classical N=
1 supersymmetric Korteweg-de Vries (SKdV) system can be transformed to some
coupled bosonic systems. The boson fields in the bosonized SKdV (BSKdV) systems
are defined on even Grassmann algebra. Due to the intrusion of other Grassmann
parameters, the BSKdV systems are different from the usual non-supersymmetric
integrable systems, and many more abundant solution structures can be
unearthed. With the help of the singularity analysis, the Painlev\'e property
of the BSKdV system is proved and a B\"acklund transformation (BT) is found.
The BT related nonlocal symmetry, we call it as residual symmetry, is used to
find symmetry reduction solutions of the BSKdV system. Hinted from the symmetry
reduction solutions, a more generalized but much simpler method is established
to find exact solutions of the BSKdV and then the SKdV systems, which actually
can be applied to any fermionic systems.Comment: 21 pages; 0 figure
Momentum broadening in weakly coupled quark-gluon plasma (with a view to finding the quasiparticles within liquid quark-gluon plasma)

We calculate P (k [subscript ⊥]), the probability distribution for an energetic parton that propagates for a distance L through a medium without radiating to pick up transverse momentum k [subscript ⊥], for a medium consisting of weakly coupled quark-gluon plasma. We use full or HTL self-energies in appropriate regimes, resumming each in order to find the leading large-L behavior. The jet quenching parameter [ˆ over q] is the second moment of P (k [subscript ⊥]), and we compare our results to other determinations of this quantity in the literature, although we emphasize the importance of looking at P (k [subscript ⊥]) in its entirety. We compare our results for P (k [subscript ⊥]) in weakly coupled quark-gluon plasma to expectations from holographic calculations that assume a plasma that is strongly coupled at all length scales. We find that the shape of P (k [subscript ⊥]) at modest k [subscript ⊥] may not be very different in weakly coupled and strongly coupled plasmas, but we find that P (k [subscript ⊥]) must be parametrically larger in a weakly coupled plasma than in a strongly coupled plasma — at large enough k [subscript ⊥]. This means that by looking for rare (but not exponentially rare) large-angle deflections of the jet resulting from a parton produced initially back-to-back with a hard photon, experimentalists can find the weakly coupled short-distance quark and gluon quasiparticles within the strongly coupled liquid quark-gluon plasma produced in heavy ion collisions, much as Rutherford found nuclei within atoms or Friedman, Kendall and Taylor found quarks within nucleons.United States. Dept. of Energy (Cooperative Research Agreement DE-FG0205ER41360)Miller Institute for Basic Research in Scienc
Conformal Anomalies in Hydrodynamics

We study the effect of conformal anomalies on the hydrodynamic description of
conformal field theories in even spacetime dimensions. We consider equilibrium
curved backgrounds characterized by a time-like Killing vector and construct a
local low energy effective action that captures the conformal anomalies. Using
as a special background the Rindler spacetime we derive a formula for the
anomaly effect on the hydrodynamic pressure. We find that this anomalous effect
is only due to the Euler central charge.Comment: 19 pages; v3: improved discussion in Section II C, fixed typos; v2:
  significant update- results generalized to any dimension, references adde
Phase structure and Hosotani mechanism in gauge theories with compact
  dimensions revisited

We investigate the phase structure of SU(3) gauge theory in four and five
dimensions with one compact dimension by using perturbative one-loop and
PNJL-model-based effective potentials, with emphasis on spontaneous gauge
symmetry breaking. When adjoint matter with the periodic boundary condition is
introduced, we have rich phase structure in the quark-mass and compact-size
space with gauge-symmetry-broken phases, called the $SU(2)\times U(1)$ split
and the $U(1)\times U(1)$ re-confined phases. Our result is qualitatively
consistent with the recent lattice calculations. When fundamental quarks are
introduced in addition to adjoint quarks, the split phase becomes more dominant
and larger as a result of explicit center symmetry breaking. We also show that
another $U(1)\times U(1)$ phase (pseudo-reconfined phase) with negative vacuum
expectation value of Polyakov loop exists in this case. We study chiral
properties in these theories and show that chiral condensate gradually
decreases and chiral symmetry is slowly restored as the size of the compact
dimension is decreased.Comment: 37 pages, 26 figures; matches published versio
Four Kahler Moduli Stabilisation in type IIB Orientifolds with K3-fibred
  Calabi-Yau threefold compactification

We present a concrete and consistent procedure to generate one kind of
non-perturbative superpotential, including the gaugino condensation corrections
and poly-instanton corrections, in type IIB orientifold compactification with
four Kahler Moduli. Then we use this kind of superpotential as well as the
alphaprime-corrections to Kahler potential to fix all of the four Kahler moduli
on a general Calabi-Yau manifold with typical K3-fibred volume form. In our
construction, the considered Calabi-Yau threefolds are K3-fibred and admit at
least one del Pezzo surface and one W-surface. Searching through all existing
four dimensional reflexive lattice polytopes, we find 23 of them fulfilling all
the requirements.Comment: 23 pages, revised version contains additional refs. and improved
  discussion about string loop corrections, typo correcte
Burgeoning the Higgs mass to 125 GeV through messenger-matter
  interactions in GMSB models

A 125 GeV Higgs renders the simpler GMSB models unnatural, essentially
pushing the soft spectrum beyond the LHC reach. A direct coupling of the matter
and messenger fields, that facilitates an enhanced mixing in the squark sector,
is a way to ameliorate this deficiency. We construct all possible
messenger-matter interaction terms considering the messenger multiplets in 1, 5
and 10 dimensional representations of the SU(5). A Froggatt-Nielsen like flavor
framework connected with the origin of fermion mass hierarchy is utilized to
control the interaction terms and suppress FCNC. We perform a detailed
comparative study of the efficiency of such interaction terms to boost the
Higgs mass keeping the soft spectrum light. We identify the more promising
models and comment on their status in present and future collider studies.Comment: Contributions from kinetic mixing incorporated, typos corrected,
  references updated, 22 pages, 5 figure
Striped phases from holography.

We discuss new types of second order phase transitions in holography by constructing striped black holes in D = 4 with AdS4 asymptotics. In the context of AdS/CFT, they provide the gravity duals to field theory phases in which translational symmetry is spontaneously broken due to the formation of current density waves. These black holes are associated to three dimensional CFTs at finite temperature and deformed by a uniform chemical potential. We numerically solve a non-linear system of PDEs in order to construct the black hole geometries and extract some of their thermodynamic properties
The Higgs Mass as a Signature of Heavy SUSY

We compute the mass of the Higgs particle in a scheme in which SUSY is broken
at a large scale M_{SS} well above the electroweak scale M_{EW}. Below M_{SS}
one assumes one is just left with the SM with a fine-tuned Higgs potential.
Under standard unification assumptions one can compute the mass of the Higgs
particle as a function of the SUSY breaking scale M_{SS}. For M_{SS} > 10^{10}
GeV one obtains m_H=126 \pm 3 GeV, consistent with CMS and ATLAS results. For
lower values of M_{SS} the values of the Higgs mass tend to those of a
fine-tuned MSSM with m_H < 130 GeV. These results support the idea that the
measured value of the Higgs mass at LHC may be considered as indirect evidence
for the existence of SUSY at some (not necessarily low) mass scale.Comment: 25 pages, 7 figures. Slight changes in figures. Conclusions unchange
Virtual Color-Kinematics Duality: 6-pt 1-Loop MHV Amplitudes

We study 1-loop MHV amplitudes in N=4 super Yang-Mills theory and in N=8
supergravity. For Yang-Mills we find that the simple form for the full
amplitude presented by Del Duca, Dixon and Maltoni naturally leads to one that
has physical residues on all compact contours. After expanding the simple form
in terms of standard scalar integrals, we introduce redundancies under certain
symmetry considerations to impose the color-kinematics duality of Bern,
Carrasco and Johansson (BCJ). For five particles we directly find the results
of Carrasco and Johansson as well as a new compact form for the supergravity
amplitude. For six particles we find that all kinematic dual Jacobi identities
are encapsulated in a single functional equation relating the expansion
coefficients. By the BCJ double-copy construction we obtain a formula for the
corresponding N=8 supergravity amplitude. Quite surprisingly, all physical
information becomes independent of the expansion coefficients modulo the
functional equation. In other words, there is no need to solve the functional
equation at all. This is quite welcome as the functional equation we find,
using our restricted set of redundancies, actually has no solutions. For this
reason we call these results virtual color-kinematics duality. We end with
speculations about the meaning of an interesting global vs. local feature of
the functional equation and the situation at higher points.Comment: minor changes, version submitted to JHE
Comprehensive study of two Higgs doublet model in light of the new boson
  with mass around 125 GeV

The recent discovery of a new boson of mass roughly 125 GeV has been reported
by the ATLAS and CMS collaborations. Although its signals in various decay
modes resemble those of the standard model (SM) Higgs boson, observed are the
combinations of entangled information about the production, decay rates and
total decay width of the new boson. In addition, some decay channels show
non-negligible deviation from the SM expectation, such as the $2\sigma$ excess
in the diphoton channel. In the four types (I, II, X and Y) of two Higgs
doublet models, we perform the global $\chi^2$ fit in three scenarios: (i) the
new boson is the light CP-even Higgs boson $h^0$; (ii) it is the heavy CP-even
Higgs boson $H^0$; (iii) the signals are from degenerate $h^0$ and the
pseudoscalar $A^0$. Considering other phenomenological constraints such as
flavor physics, electroweak precision data, and the LEP search for the Higgs
boson, we find that the the first scenarios in Type II and Type Y models
actually provide better or similarly good fit to the data than the SM. All the
other models are excluded at 95% C.L..Comment: References are added with 18 pages, 2 figures, 4 table