pinecone/core-2020-05-10-deduplication huggingface dataset:
Gluino Meets Flavored Naturalness

We study constraints from LHC run I on squark and gluino masses in the
presence of squark flavor violation. Inspired by the concept of `flavored
naturalness', we focus on the impact of a non-zero stop-scharm mixing and mass
splitting in the right-handed sector. To this end, we recast four searches of
the ATLAS and CMS collaborations, dedicated either to third generation squarks,
to gluino and squarks of the first two generations, or to charm-squarks. In the
absence of extra structure, the mass of the gluino provides an additional
source of fine tuning and is therefore important to consider within models of
flavored naturalness that allow for relatively light squark states. When
combining the searches, the resulting constraints in the plane of the lightest
squark and gluino masses are rather stable with respect to the presence of
flavor-violation, and do not allow for gluino masses of less than 1.2 TeV and
squarks lighter than about 550 GeV. While these constraints are stringent,
interesting models with sizable stop-scharm mixing and a relatively light
squark state are still viable and could be observed in the near future.Comment: 34 pages. v2: clarifying comments and few references added, typos
  fixed, matches published versio
The Scalar Triplet Contribution to Lepton Flavour Violation and
  Neutrinoless Double Beta Decay in Left-Right Symmetric Model

We analyse in detail the scalar triplet contribution to the low-energy lepton
flavour violating (LFV) and lepton number violating (LNV) processes within a
TeV-scale left-right symmetric framework. We show that in both type-I and
type-II seesaw dominance for the light neutrino masses, the triplet of mass
comparable to or smaller than the largest right-handed neutrino mass scale can
give sizeable contribution to the LFV processes, except in the quasi-degenerate
limit of light neutrino masses, where a suppression can occur due to
cancellations. In particular, a moderate value of the heaviest neutrino to
scalar triplet mass ratio $r\lesssim {\cal O}(1)$ is still experimentally
allowed and can be explored in the future LFV experiments. Similarly, the
contribution of a relatively light triplet to the LNV process of neutrinoless
double beta decay could be significant, disfavouring a part of the model
parameter space otherwise allowed by LFV constraints. Nevertheless, we find
regions of parameter space consistent with both LFV and LNV searches, for which
the values of the total effective neutrino mass can be accessible to the next
generation ton-scale experiments. Such light triplets can also be directly
searched for at the LHC, thus providing a complementary probe of this scenario.
Finally, we also study the implications of the triplet contribution for the
left-right symmetric model interpretation of the recent diboson anomaly at the
LHC.Comment: 28 pages, 17 figures; minor changes, version to appear in JHE
Dark matter beams at LBNF

High-intensity neutrino beam facilities may produce a beam of light dark
matter when protons strike the target. Searches for such a dark matter beam
using its scattering in a nearby detector must overcome the large neutrino
background. We characterize the spatial and energy distributions of the dark
matter and neutrino beams, focusing on their differences to enhance the
sensitivity to dark matter. We find that a dark matter beam produced by a $Z'$
boson in the GeV mass range is both broader and more energetic than the
neutrino beam. The reach for dark matter is maximized for a detector sensitive
to hard neutral-current scatterings, placed at a sizable angle off the neutrino
beam axis. In the case of the Long-Baseline Neutrino Facility (LBNF), a
detector placed at roughly 6 degrees off axis and at a distance of about 200 m
from the target would be sensitive to $Z'$ couplings as low as 0.05. This
search can proceed symbiotically with neutrino measurements. We also show that
the MiniBooNE and MicroBooNE detectors, which are on Fermilab's Booster
beamline, happen to be at an optimal angle from the NuMI beam and could perform
searches with existing data. This illustrates potential synergies between LBNF
and the short-baseline neutrino program if the detectors are positioned
appropriately.Comment: 26 pages, 7 figure
CP Violating Two-Higgs-Doublet Model: Constraints and LHC Predictions

Two-Higgs-Doublet Models (2HDMs) are amongst the simplest extensions of the
Standard Model. Such models allow for tree-level CP Violation (CPV) in the
Higgs sector. We analyse a class of CPV 2HDM (of Type-I) in which only one of
the two Higgs doublets couples to quarks and leptons, avoiding dangerous
Flavour Changing Neutral Currents. We provide an up to date and comprehensive
analysis of the constraints and Large Hadron Collider (LHC) predictions of such
a model. Of immediate interest to the LHC Run 2 is the golden channel where all
three neutral Higgs bosons are observed to decay into gauge boson pairs, $WW$
and $ZZ$, providing a smoking gun signature of the CPV 2HDM.Comment: The version appearing in JHE
Single-centered black hole microstate degeneracies from instantons in
  supergravity

We obtain holographic constraints on the microscopic degeneracies of black
holes by computing the exact macroscopic quantum entropy using localization,
including the effects of string worldsheet instantons in the supergravity
effective action. For $\frac14$-BPS black holes in type II string theory on $K3
\times T^{2}$, the constraints can be explicitly checked against expressions
for the microscopic BPS counting functions that are known in terms of certain
mock modular forms. We find that the effect of including the infinite sum over
instantons in the holomorphic prepotential of the supergravity leads to a sum
over Bessel functions with successively sub-leading arguments as in the
Rademacher expansion of Jacobi forms -- but begins to disagree with such a
structure near an order where the mock modular nature becomes relevant. This
leads to a systematic method to recover the polar terms of the microscopic
degeneracies from the degeneracy of instantons (the Gromov-Witten invariants).
We check explicitly that our formula agrees with the known microscopic answer
for the first seven values of the magnetic charge invariant.Comment: 32 pages, comments added in v2, submitted to JHE
Toward precision holography with supersymmetric Wilson loops

We consider certain 1/4 BPS Wilson loop operators in SU(N) ${\cal N}=4$
supersymmetric Yang-Mills theory, whose expectation value can be computed
exactly via supersymmetric localization. Holographically, these operators are
mapped to fundamental strings in AdS5 x S5. The string on-shell action
reproduces the large N and large coupling limit of the gauge theory expectation
value and, according to the AdS/CFT correspondence, there should also be a
precise match between subleading corrections to these limits. We perform a test
of such match at next-to-leading order in string theory, by deriving the
spectrum of quantum fluctuations around the classical string solution and by
computing the corresponding 1-loop effective action. We discuss in detail the
supermultiplet structure of the fluctuations. To remove a possible source of
ambiguity in the ghost zero mode measure, we compare the 1/4 BPS configuration
with the 1/2 BPS one, dual to a circular Wilson loop. We find a discrepancy
between the string theory result and the gauge theory prediction, confirming a
previous result in the literature. We are able to track the modes from which
this discrepancy originates, as well as the modes that by themselves would give
the expected result.Comment: 5 pages; v2: 43 pages, long version fixing a mistake and altering the
  conclusion
Detailed ultraviolet asymptotics for AdS scalar field perturbations

We present a range of methods suitable for accurate evaluation of the leading
asymptotics for integrals of products of Jacobi polynomials in limits when the
degrees of some or all polynomials inside the integral become large. The
structures in question have recently emerged in the context of effective
descriptions of small amplitude perturbations in anti-de Sitter (AdS)
spacetime. The limit of high degree polynomials corresponds in this situation
to effective interactions involving extreme short-wavelength modes, whose
dynamics is crucial for the turbulent instabilities that determine the ultimate
fate of small AdS perturbations. We explicitly apply the relevant asymptotic
techniques to the case of a self-interacting probe scalar field in AdS and
extract a detailed form of the leading large degree behavior, including closed
form analytic expressions for the numerical coefficients appearing in the
asymptotics.Comment: v2: 19 pages, expanded version accepted to JHE
Rainbow Valley of Colored (Anti) de Sitter Gravity in Three Dimensions

We propose a theory of three-dimensional (anti) de Sitter gravity carrying
Chan-Paton color charges. We define the theory by Chern-Simons formulation with
the gauge algebra $(\mathfrak{gl}_{2}\oplus \mathfrak{gl}_{2})\otimes
\mathfrak{u}(N)$, obtaining a color-decorated version of interacting spin-one
and spin-two fields. We also describe the theory in metric formulation and show
that, among $N^{2}$ massless spin-two fields, only the singlet one plays the
role of metric graviton whereas the rest behave as \emph{colored spinning
matter} that strongly interacts at large $N$. Remarkably, these \emph{colored
spinning matter} acts as Higgs field and generates a non-trivial potential of
staircase shape. At each extremum labelled by $k = 0, \ldots, [\frac{N-1}2]$,
the $\mathfrak{u}(N)$ color gauge symmetry is spontaneously broken down to
$\mathfrak{u}(N-k)\oplus \mathfrak{u}(k)$ and provides different (A)dS
backgrounds with the cosmological constants
$\big(\frac{N}{N-2k}\big)^{2}\,\L$\,. When this symmetry breaking takes place,
the spin-two Goldstone modes combine with (or are eaten by) the spin-one gauge
fields to become partially-massless spin-two fields. We discuss various aspects
of this theory and highlight physical implications.Comment: 1+29 pages; 3 embedded fig v2. details of partially massless spectru
Long-Lived Staus and Displaced Leptons at the LHC

As the majority of LHC searches are focused on prompt signatures, specific
long-lived particles have the potential to be overlooked by the otherwise
systematic new physics programs at ATLAS and CMS. While in many cases
long-lived superparticles are now stringently constrained by existing exotic
searches, we point out that the highly motivated model of gauge mediation with
staus as the next-to-lightest superparticle (NLSP) has received less attention.
We recast LHC searches for heavy stable charged particles, disappearing tracks,
and opposite-flavor leptons with large impact parameters to assess current
constraints on a variety of spectra that contain an NLSP stau, and find that
portions of the parameter space motivated by naturalness are still
experimentally unexplored. We additionally note a gap in the current
experimental search program: same-flavor leptons with large impact parameters
evade the suite of existing searches for long-lived objects. This gap is
especially noteworthy as vetoes on displaced leptons in prompt new physics
searches could be systematically discarding such events. We discuss several
motivated models that can exhibit same-flavor displaced leptons: gauge
mediation with co-NLSP sleptons, extended gauge mediation, R-parity violation,
and lepton-flavored dark matter that freezes in during a matter-dominated era
of the early universe. To address this gap, we propose a straightforward
extension of the CMS search for leptons with large impact parameters, and
project sensitivity to these scenarios at 13 TeV. Throughout this analysis, we
highlight several methods whereby LHC searches for exotic long-lived objects
could potentially improve their sensitivity to the displaced leptons
originating from gauge mediation and beyond.Comment: 48 pages, 6 figures, journal versio
BCFT moduli space in level truncation

We propose a new non-perturbative method to search for marginal deformations
in level truncated open string field theory. Instead of studying the flatness
of the effective potential for the marginal field (which is not expected to
give a one-to-one parametrization of the BCFT moduli space), we identify a new
non-universal branch of the tachyon potential which, from known analytic
examples, is expected to parametrize the marginal flow in a much larger region
of the BCFT moduli space. By a level 18 computation in Siegel gauge, we find an
increasingly flat effective potential in the non-universal sector, connected to
the perturbative vacuum and we confirm that the coefficient of the marginal
field (lambda_SFT) has a maximum compatible with the value where the solutions
stop existing in the standard Sen-Zwiebach approach. At the maximal reachable
level, the effective potential still deviates from flatness for large values of
the tachyon, but the Ellwood invariants stay close to the correct BCFT values
on the whole branch and the full periodic moduli space of the cosine
deformation is covered.Comment: 33 pages, several figures. V2: typos and minor presentation
  improvements, JHEP versio
Analytical and Numerical Study of Gauss-Bonnet Holographic
  Superconductors with Power-Maxwell Field

We provide an analytical as well as a numerical study of the holographic
$s$-wave superconductors in Gauss-Bonnet gravity with Power-Maxwell
electrodynamics. We limit our study to the case where scalar and gauge fields
do not have an effect on the background metric. We use a variational method,
based on Sturm-Liouville eigenvalue problem for our analytical study, as well
as a numerical shooting method in order to compare with our analytical results.
Interestingly enough, we observe that unlike Born-Infeld-like nonlinear
electrodynamics which decrease the critical temperature compared to the linear
Maxwell field, the Power-Maxwell electrodynamics is able to increase the
critical temperature of the holographic superconductors in the sublinear
regime. We find that requiring the finite value for the gauge field on the
asymptotic boundary $r\rightarrow \infty$, restricts the power parameter, $q$,
of the Power-Maxwell field to be in the range $1/2<q<{(d-1)}/{2}$. Our study
indicates that it is quite possible to make condensation \emph{easier} as $q$
\emph{decreases} in its allowed range. We also find that for all values of $q$,
the condensation can be affected by the Gauss-Bonnet coefficient $\alpha$.
However, the presence of the Gauss-Bonnet term makes the transition slightly
harder. Finally, we obtain an analytic expression for the order parameter and
thus obtain the associated critical exponent near the phase transition. We find
that the critical exponent has its universal value of $\beta=1/2$ regardless of
the parameters $q$, $\alpha$ as well as dimension $d$, consistent with
mean-field values obtained in previous studies.Comment: 16 pages, 5 figure
MSSM A-funnel and the Galactic Center Excess: Prospects for the LHC and
  Direct Detection Experiments

The pseudoscalar resonance or "A-funnel" in the Minimal Supersymmetric
Standard Model~(MSSM) is a widely studied framework for explaining dark matter
that can yield interesting indirect detection and collider signals. The
well-known Galactic Center excess (GCE) at GeV energies in the gamma ray
spectrum, consistent with annihilation of a $\lesssim 40$ GeV dark matter
particle, has more recently been shown to be compatible with significantly
heavier masses following reanalysis of the background. In this paper, we
explore the LHC and direct detection implications of interpreting the GCE in
this extended mass window within the MSSM A-funnel framework. We find that
compatibility with relic density, signal strength, collider constraints, and
Higgs data can be simultaneously achieved with appropriate parameter choices.
The compatible regions give very sharp predictions of 200-600 GeV CP-odd/even
Higgs bosons at low tan$\beta$ at the LHC and spin-independent cross sections
$\approx 10^{-11}$ pb at direct detection experiments. Regardless of
consistency with the GCE, this study serves as a useful template of the strong
correlations between indirect, direct, and LHC signatures of the MSSM A-funnel
region.Comment: 32 pages and 9 figure
The Schwinger Mechanism in (Anti) de Sitter Spacetimes

We present a short and novel derivation of the Schwinger mechanism for
particle pair production in $1+1$ dimensional de Sitter and Anti de Sitter
spacetimes. We work directly in the flat embedding space and derive the pair
production rates in these spacetimes via instanton methods. The derivation is
manifestly coordinate independent, and also lends support to the possible deep
connection between two conceptually disparate quantum phenomena - Schwinger
effect and the Davies-Unruh effect.Comment: 9 pages. References added, typos corrected and expanded conclusio
One-loop Test of Free SU(N) Adjoint Model Holography

We consider the holographic duality where the CFT side is given by $SU(N)$
adjoint free scalar field theory. Compared to the vector models, the set of
single trace operators is immensely extended so that the corresponding AdS
theory also contains infinitely many massive higher spin fields on top of the
massless ones. We compute the one-loop vacuum energy of these AdS fields to
test this duality at the subleading order in large $N$ expansion. The
determination of the bulk vacuum energy requires a proper scheme to sum up the
infinitely many contributions. For that, we develop a new method and apply it
first to calculate the vacuum energies for the first few `Regge trajectories'
in AdS$_4$ and AdS$_5$. In considering the full vacuum energy of AdS theory
dual to a matrix model CFT, we find that there exist more than one available
prescriptions for the one-loop vacuum energy. Taking a particular prescription,
we determine the full vacuum energy of the AdS$_5$ theory, whereas the AdS$_4$
calculation still remains technically prohibitive. This result shows that the
full vacuum energy of the AdS$_5$ theory coincides with minus of the free
energy of a single scalar field on the boundary. This is analogous to the
$O(N)$ vector model case, hence suggests an interpretation of the
\emph{positive} shift of the bulk coupling constant, i.e. from $N^2-1$ to
$N^2$.Comment: 67 pages. References added. Final version to appear in JHE
The Zbb Couplings at Future e+e- Colliders

Many new physics models predict sizable modifications to the SM Zbb
couplings, while the corresponding measurements at LEP and SLC exhibit some
discrepancy with the SM predictions. After updating the current results on the
Zbb coupling constraints from global fits, we list the observables that are
most important for improving the Zbb coupling constraints and estimate the
expected precision reach of three proposed future e+e- colliders, CEPC, ILC and
FCC-ee. We consider both the case that the results are SM-like and the one that
the Zbb couplings deviate significantly from the SM predictions. We show that,
if we assume the value of the Zbb couplings to be within 68% CL of the current
measurements, any one of the three colliders will be able to rule out the SM
with more than 99.9999% CL (5 sigma). We study the implications of the improved
Zbb coupling constraints on new physics models, and point out their
complementarity with the constraints from the direct search of new physics
particles at the LHC, as well as with Higgs precision measurements. Our results
provide a further motivation for the construction of future e+e- colliders.Comment: 32 pages, 7 figures. v2: added appendix on theoretical uncertainties,
  minor corrections, references added, matches published version in JHE
Lattice calculation of the leading strange quark-connected contribution
  to the muon $g-2$

We present results for the leading hadronic contribution to the muon
anomalous magnetic moment due to strange quark-connected vacuum polarisation
effects. Simulations were performed using RBC--UKQCD's $N_f=2+1$ domain wall
fermion ensembles with physical light sea quark masses at two lattice spacings.
We consider a large number of analysis scenarios in order to obtain solid
estimates for residual systematic effects. Our final result in the continuum
limit is $a_\mu^{(2)\,{\rm
had},\,s}=53.1(9)\left(^{+1}_{-3}\right)\times10^{-10}$.Comment: 21 pages, 5 figure
Linear Versus Non-linear Supersymmetry, in General

We study superconformal and supergravity models with constrained superfields.
The underlying version of such models with all unconstrained superfields and
linearly realized supersymmetry is presented here, in addition to the physical
multiplets there are Lagrange multiplier (LM) superfields. Once the equations
of motion for the LM superfields are solved, some of the physical superfields
become constrained. The linear supersymmetry of the original models becomes
non-linearly realized, its exact form can be deduced from the original linear
supersymmetry. Known examples of constrained superfields are shown to require
the following LM's: chiral superfields, linear superfields, general complex
superfields, some of them are multiplets with a spin.Comment: 24
Supersymmetric Field Theories on AdS_p x S^q

In this paper we study supersymmetric field theories on an AdS_p x S^q
space-time that preserves their full supersymmetry. This is an interesting
example of supersymmetry on a non-compact curved space. The supersymmetry
algebra on such a space is a (p-1)-dimensional superconformal algebra, and we
classify all possible algebras that can arise for p >= 3. In some AdS_3 cases
more than one superconformal algebra can arise from the same field theory. We
discuss in detail the special case of four dimensional field theories with N=1
and N=2 supersymmetry on AdS_3 x S^1.Comment: 45 pages, late
Holographic entanglement entropy of surface defects

We calculate the holographic entanglement entropy in type IIB supergravity
solutions that are dual to half-BPS disorder-type surface defects in ${\cal
N}=4$ Super Yang-Mills theory. The entanglement entropy is calculated for a
ball-shaped region bisected by a surface defect. Using the bubbling
supergravity solutions we also compute the expectation value of the defect
operator. Combining our result with the previously-calculated one-point
function of the stress tensor in the presence of the defect, we adapt the
calculation of Lewkowycz and Maldacena to obtain a second expression for the
entanglement entropy. Our two expressions agree up to an additional term, whose
possible origin and significance is discussedComment: 41 pages. pdflatex, 3 figures. v2: typos corrected, reference
  corrected, some comments on CFT interpretation added. v3: references added,
  some clarification
Tracing symmetries and their breakdown through phases of heterotic (2,2)
  compactifications

We are considering the class of heterotic $\mathcal{N}=(2,2)$ Landau-Ginzburg
orbifolds with 9 fields corresponding to $A_1^9$ Gepner models. We classify all
of its Abelian discrete quotients and obtain 152 inequivalent models closed
under mirror symmetry with $\mathcal{N}=1,2$ and $4$ supersymmetry in 4D. We
compute the full massless matter spectrum at the Fermat locus and find a
universal relation satisfied by all models. In addition we give prescriptions
of how to compute all quantum numbers of the 4D states including their discrete
R-symmetries. Using mirror symmetry of rigid geometries we describe orbifold
and smooth Calabi-Yau phases as deformations away from the Landau-Ginzburg
Fermat locus in two explicit examples. We match the non-Fermat deformations to
the 4D Higgs mechanism and study the conservation of R-symmetries. The first
example is a $\mathbb{Z}_3$ orbifold on an E$_6$ lattice where the R-symmetry
is preserved. Due to a permutation symmetry of blow-up and torus K\"{a}hler
parameters the R-symmetry stays conserved also smooth Calabi-Yau phase. In the
second example the R-symmetry gets broken once we deform to the geometric
$\mathbb{Z}_3 \times \mathbb{Z}_{3,\text{free}}$ orbifold regime.Comment: 35 pages, 2 figure