pinecone/core-2020-05-10-deduplication huggingface dataset:
Search for Higgs portal DM at the ILC

Higgs portal dark matter (DM) models are simple interesting and viable DM
models. There are three types of the models depending on the DM spin: scalar,
fermion and vector DM models. In this paper, we consider renormalizable,
unitary and gauge invariant Higgs portal DM models, and study how large
parameter regions can be surveyed at the International Linear Collider (ILC)
experiment at $\sqrt{s}=500$ GeV. For the Higgs portal singlet fermion and
vector DM cases, the force mediator involves two scalar propagators, the
SM-like Higgs boson and the dark Higgs boson. We show that their interference
generates interesting and important patterns in the mono-$Z$ plus missing $E_T$
signatures at the ILC, and the results are completely different from those
obtained from the Higgs portal DM models within the effective field theories.
In addition, we show that it would be possible to distinguish the spin of DM in
the Higgs portal scenarios, if the shape of the recoil-mass distribution is
observed. We emphasize that the interplay between these collider observations
and those in the direct detection experiments has to be performed in the model
with renomalizability and unitarity to combine the model analyses in different
scales.Comment: 25 pages, 15 figures; minor changes, references added; discussions
  added, numbers in Table 1 correcte
String Moduli Stabilization at the Conifold

We study moduli stabilization for type IIB orientifolds compactified on
Calabi-Yau threefolds in the region close to conifold singularities in the
complex structure moduli space. The form of the periods implies new phenomena
like exponential mass hierarchies even in the regime of negligible warping.
Integrating out the heavy conic complex structure modulus leads to an effective
flux induced potential for the axio-dilaton and the remaining complex structure
moduli containing exponentially suppressed terms that imitate non-perturbative
effects. It is shown that this scenario can be naturally combined with the
large volume scenario so that all moduli are dynamically stabilized in the
dilute flux regime. As an application of this moduli stabilization scheme, a
string inspired model of aligned inflation is designed that features a
parametrically controlled hierarchy of mass scales.Comment: 33 pages, 4 figures, v2: final versio
You can hide but you have to run: direct detection with vector mediators

We study direct detection in simplified models of Dark Matter (DM) in which
interactions with Standard Model (SM) fermions are mediated by a heavy vector
boson. We consider fully general, gauge-invariant couplings between the SM, the
mediator and both scalar and fermion DM. We account for the evolution of the
couplings between the energy scale of the mediator mass and the nuclear energy
scale. This running arises from virtual effects of SM particles and its
inclusion is not optional. We compare bounds on the mediator mass from direct
detection experiments with and without accounting for the running. In some
cases the inclusion of these effects changes the bounds by several orders of
magnitude, as a consequence of operator mixing which generates new interactions
at low energy. We also highlight the importance of these effects when
translating LHC limits on the mediator mass into bounds on the direct detection
cross section. For an axial-vector mediator, the running can alter the derived
bounds on the spin-dependent DM-nucleon cross section by a factor of two or
more. Finally, we provide tools to facilitate the inclusion of these effects in
future studies: general approximate expressions for the low energy couplings
and a public code runDM to evolve the couplings between arbitrary energy
scales.Comment: 26 pages + appendices, 9 + 2 figures. The runDM code is available at
  https://github.com/bradkav/runDM/. v2: references added, version published in
  JHE
Streamlining resummed QCD calculations using Monte Carlo integration

Some of the most arduous and error-prone aspects of precision resummed
calculations are related to the partonic hard process, having nothing to do
with the resummation. In particular, interfacing to parton-distribution
functions, combining various channels, and performing the phase space
integration can be limiting factors in completing calculations. Conveniently,
however, most of these tasks are already automated in many Monte Carlo
programs, such as MadGraph, Alpgen or Sherpa. In this paper, we show how such
programs can be used to produce distributions of partonic kinematics with
associated color structures representing the hard factor in a resummed
distribution. These distributions can then be used to weight convolutions of
jet, soft and beam functions producing a complete resummed calculation. In
fact, only around 1000 unweighted events are necessary to produce precise
distributions. A number of examples and checks are provided, including $e^+e^-$
two- and four-jet event shapes, $n$-jettiness and jet-mass related observables
at hadron colliders. Attached code can be used to modify MadGraph to export the
relevant leading-order hard functions and color structures for arbitrary
processes.Comment: 30 pages, 10 figures, code included with submissio
Galactic Gamma Ray Excess and Dark Matter Phenomenology in a
  $U(1)_{B-L}$ Model

In this work, we have considered a gauged $U(1)_{\rm B-L}$ extension of the
Standard Model (SM) with three right handed neutrinos for anomaly cancellation
and two additional SM singlet complex scalars with non-trivial B-L charges. One
of these is used to spontaneously break the $U(1)_{\rm B-L}$ gauge symmetry,
leading to Majorana masses for the neutrinos through the standard Type I seesaw
mechanism, while the other becomes the dark matter (DM) candidate in the model.
We test the viability of the model to simultaneously explain the DM relic
density observed in the CMB data as well as the Galactic Centre (GC)
$\gamma$-ray excess seen by Fermi-LAT. We show that for DM masses in the range
40-55 GeV and for a wide range of $U(1)_{\rm B-L}$ gauge boson masses, one can
satisfy both these constraints if the additional neutral Higgs scalar has a
mass around the resonance region. In studying the dark matter phenomenology and
GC excess, we have taken into account theoretical as well as experimental
constraints coming from vacuum stability condition, PLANCK bound on DM relic
density, LHC and LUX and present allowed areas in the model parameter space
consistent with all relevant data, calculate the predicted gamma ray flux from
the GC and discuss the related phenomenology.Comment: 33 Pages, 11 Figures, 3 Tables, Version accepted for publication in
  JHE
331 Models Facing the Tensions in $\Delta F=2$ Processes with the Impact
  on $\varepsilon^\prime/\varepsilon$, $B_s\to\mu^+\mu^-$ and $B\to
  K^*\mu^+\mu^-$

Motivated by the recently improved lattice QCD results on the hadronic matrix
elements entering $\Delta M_{s,d}$ in $B_{s,d}^0-\bar B_{s,d}^0$ mixings and
the resulting increased tensions between $\Delta M_{s,d}$ and $\varepsilon_K$
in the Standard Model and CMFV models, we demonstrate that these tensions can
be removed in 331 models based on the gauge group $SU(3)_C\times SU(3)_L\times
U(1)_X$ both for $M_{Z^\prime}$ in the LHC reach and well beyond it. But the
implied new physics (NP) patterns in $\Delta F=1$ observables depend
sensitively on the value of $|V_{cb}|$. Concentrating the analysis on three 331
models that have been selected by us previously on the basis of their
performance in electroweak precision tests and $\varepsilon^\prime/\varepsilon$
we illustrate this for $|V_{cb}|=0.042$ and $|V_{cb}|=0.040$. We find that
these new lattice data still allow for positive shifts in
$\varepsilon^\prime/\varepsilon$ up to $6\times 10^{-4}$ for
  $M_{Z^\prime}=3~TeV$ for both values of $$|V_{cb}|$ but for
$M_{Z^\prime}=10~TeV$ only for $|V_{cb}|=0.040$ such shifts can be obtained. NP
effects in $B_s\to\mu^+\mu^-$ and in the Wilson coefficient $C_9$ are
significantly larger in all three models for the case of $|V_{cb}|=0.040$. In
particular in two models the rate for $B_s\to\mu^+\mu^-$ can be reduced by NP
by $20\%$ for $M_{Z^\prime}=3~TeV$ resulting in values in the ballpark of
central values from CMS and LHCb. In the third model a shift in $C_9$ up to
$C_9^\text{NP}=-0.5$ is possible. We also consider the simplest 331 model,
analyzed recently in the literature, in which $X=Y$, the usual hypercharge. We
find that in this model NP effects in flavour observables are much smaller than
in the three models with $X\not=Y$, in particular NP contributions to the ratio
  $\varepsilon^\prime/\varepsilon$ are very strongly suppressed.Comment: LaTeX, 24 pages, 16 figures. Discussion on $V_{ub}$ and $V_{cb}$
  improved, two more figures added, conclusions unchange
Momentum Analyticity of Transverse Polarization Tensor in the Normal
  Phase of a Holographic Superconductor

We explore the momentum analyticity of the static transverse polarization
tensor of a 2+1 dimensional holographic superconductor in its normal phase with
a nonzero chemical potential, aiming at finding the holographic counterpart of
the singularities underlying the Friedel-like oscillations of an ordinary field
theory. We prove that the polarization tensor is a meromorphic function with an
infinite number of poles located on the complex momentum plane off real axis.
With the aid of the WKB approximation these poles are found to lies
asymptotically along two straight lines parallel to the imaginary axis for a
large momentum magnitude. The similarity between the holographic Green's
function and that of an weakly coupled ordinary field theory (e.g., 2+1
dimensional QED) regarding the location of the momentum singularities offers
further support to the validity of the gauge/gravity duality.Comment: 17 pages, 2 figure
The character of the supersymmetric Casimir energy

We study the supersymmetric Casimir energy $E_\mathrm{susy}$ of
$\mathcal{N}=1$ field theories with an R-symmetry, defined on rigid
supersymmetric backgrounds $S^1\times M_3$, using a Hamiltonian formalism.
These backgrounds admit an ambi-Hermitian geometry, and we show that the net
contributions to $E_\mathrm{susy}$ arise from certain twisted holomorphic modes
on $\mathbb{R}\times M_3$, with respect to both complex structures. The
supersymmetric Casimir energy may then be identified as a limit of an
index-character that counts these modes. In particular this explains a recent
observation relating $E_\mathrm{susy}$ on $S^1\times S^3$ to the anomaly
polynomial. As further applications we compute $E_\mathrm{susy}$ for certain
secondary Hopf surfaces, and discuss how the index-character may also be used
to compute generalized supersymmetric indices.Comment: 47 pages; v2: footnote 6 added, formula (5.29) changed, Section 6
  moved to Appendix
Quantum Corrections to Holographic Mutual Information

We compute the leading contribution to the mutual information (MI) of two
disjoint spheres in the large distance regime for arbitrary conformal field
theories (CFT) in any dimension. This is achieved by refining the operator
product expansion method introduced by Cardy \cite{Cardy:2013nua}. For CFTs
with holographic duals the leading contribution to the MI at long distances
comes from bulk quantum corrections to the Ryu-Takayanagi area formula.
According to the FLM proposal\cite{Faulkner:2013ana} this equals the bulk MI
between the two disjoint regions spanned by the boundary spheres and their
corresponding minimal area surfaces. We compute this quantum correction and
provide in this way a non-trivial check of the FLM proposal.Comment: 16 pages, 2 figures, acknowledges added to match the submitted JHEP
  versio
The holographic dual of a Riemann problem in a large number of
  dimensions

We study properties of a non equilibrium steady state generated when two heat
baths are initially in contact with one another. The dynamics of the system we
study are governed by holographic duality in a large number of dimensions. We
discuss the "phase diagram" associated with the steady state; the dual,
dynamical, black hole description of this problem; and its relation to the
fluid/gravity correspondence.Comment: 34 pages, 35 figures; v2 ref added, bug in hyperlinks fixed; v3
  clarifying remarks added, version to appear in JHE
Entanglement of Spatial Regions vs. Entanglement of Particles

Consider an arbitrary local quantum field theory with a gap or an arbitrary
gapless free theory. We consider states in such a theory, that describe two
entangled particles localized in disjoint regions of space. We show that in
such a state, to leading order, R\'{e}nyi entropies of spatial regions,
containing only one of the particles are same as their quantum mechanical
counterparts, after subtraction of vacuum contribution. Subleading corrections
depend on overlap of wave functions. These results suggest that Von Neumann
entropy of a spatial region, after subtraction of vacuum contribution, can
serve as a measure of entanglement of indistinguishable particles in pure
states.Comment: 14 pages, v5: JHEP published versio
3d Deconfinement, Product gauge group, Seiberg-Witten and New 3d
  dualities

We construct a three dimensional deconfinement method which enables us to
find new three-dimensional dualities and we apply various techniques developed
in four dimensional supersymmetric gauge theories, such as the product gauge
groups and Seiberg-Witten curves to the three dimensional $\mathcal{N}=2$
supersymmetric gauge theories. Dual descriptions of three dimensional
$\mathcal{N}=2$ supersymmetric gauge theories which involve two-index matters,
for example, adjoint, symmetric, and anti-symmetric matters without
superpotentials can be obtained. These matters are described in terms of
s-confining phases of the supersymmetric gauge theories.Comment: 46 page
Viscosity of holographic fluid in the presence of dark matter sector

Based on the gauge/gravity correspondence, the hydrodynamic response
coefficients, shear and Hall viscosities, have been studied. The holographic
model of Einstein-Maxwell- AdS $(3+1)$-dimensional system additionally coupled
with the another gauge field mimicking the {\it dark matter} sector, as well
as, gravitational Chern-Simons term bounded with a dynamical scalar field, were
taken into account. Condensation of the scalar field provides the parity
violating term. Both shear and Hall viscosities have been calculated and their
dependence on $\alpha$ - the coupling constant between matter and {\it dark
matter} sectors has been studied. To the lowest order in the derivative
expansion and perturbation in $\alpha$, the shear viscosity is not influenced
by the {\it dark matter}, while the Hall component linearly depends on
$\alpha$.Comment: JHEP style, this version meets the published one, JHEP08 (2016) 12
Unitarisation of EFT Amplitudes for Dark Matter Searches at the LHC

We propose a new approach to the LHC dark matter search analysis within the
effective field theory (EFT) framework by utilising the K-matrix unitarisation
formalism. This approach provides a reasonable estimate of the dark matter
production cross section at high energies, and hence allows reliable bounds to
be placed on the cut-off scale of relevant operators without running into the
problem of perturbative unitarity violation. We exemplify this procedure for
the effective operator D5 in monojet dark matter searches in the collinear
approximation. We compare our bounds to those obtained using the truncation
method and identify a parameter region where the unitarisation prescription
leads to more stringent bounds.Comment: 20 pages, 7 figures. References added and minor corrections made to
  match published versio
A new view on vacuum stability in the MSSM

A consistent theoretical description of physics at high energies requires an
assessment of vacuum stability in either the Standard Model or any extension of
it. Especially supersymmetric extensions allow for several vacua and the choice
of the desired electroweak one gives strong constraints on the parameter space.
As the general parameter space in the Minimal Supersymmetric Standard Model is
huge, any severe constraint on it unrelated to direct phenomenological
observations enhances the predictability of the model. We perform an updated
analysis of possible charge and color breaking minima without relying on fixed
directions in field space that minimize certain terms in the potential (known
as "D-flat" directions). Concerning the cosmological stability of false vacua,
we argue that there are always directions in configuration space which lead to
very short-lived vacua and therefore such exclusions are strict. In addition to
existing strong constraints on the parameter space, we find even stronger
constraints extending the field space compared to previous analyses and combine
those constraints with predictions for the light CP-even Higgs mass in the
Minimal Supersymmetric Standard Model. Low masses for supersymmetric partners
are excluded from vacuum stability in combination with the 125 GeV Higgs and
the allowed parameter space opens at a few TeV.Comment: 32 pages, 10 figures; v3: typos corrected, matches version to be
  published in JHE
Short-distance QCD corrections to $K^0\bar{K}^0$ mixing at
  next-to-leading order in Left-Right models

Left-Right (LR) models are extensions of the Standard Model where left-right
symmetry is restored at high energies, and which are strongly constrained by
kaon mixing described in the framework of the $|\Delta S|=2$ effective
Hamiltonian. We consider the short-distance QCD corrections to this Hamiltonian
both in the Standard Model (SM) and in LR models. The leading logarithms
occurring in these short-distance corrections can be resummed within a
rigourous Effective Field Theory (EFT) approach integrating out heavy degrees
of freedom progressively, or using an approximate simpler method of regions
identifying the ranges of loop momentum generating large logarithms in the
relevant two-loop diagrams. We compare the two approaches in the SM at
next-to-leading order, finding a very good agreement when one scale dominates
the problem, but only a fair agreement in the presence of a large logarithm at
leading order. We compute the short-distance QCD corrections for LR models at
next-to-leading order using the method of regions, and we compare the results
with the EFT approach for the $WW'$ box with two charm quarks (together with
additional diagrams forming a gauge-invariant combination), where a large
logarithm occurs already at leading order. We conclude by providing
next-to-leading-order estimates for $cc$, $ct$ and $tt$ boxes in LR models.Comment: Accepted for publication in JHE
Fractional Statistics and the Butterfly Effect

Fractional statistics and quantum chaos are both phenomena associated with
the non-local storage of quantum information. In this article, we point out a
connection between the butterfly effect in (1+1)-dimensional rational conformal
field theories and fractional statistics in (2+1)-dimensional topologically
ordered states. This connection comes from the characterization of the
butterfly effect by the out-of-time-order-correlator proposed recently. We show
that the late-time behavior of such correlators is determined by universal
properties of the rational conformal field theory such as the modular S-matrix
and conformal spins. Using the bulk-boundary correspondence between rational
conformal field theories and (2+1)-dimensional topologically ordered states, we
show that the late time behavior of out-of-time-order-correlators is
intrinsically connected with fractional statistics in the topological order. We
also propose a quantitative measure of chaos in a rational conformal field
theory, which turns out to be determined by the topological entanglement
entropy of the corresponding topological order.Comment: Published version, 1+25 pages, 10 figure
Short interval expansion of R\'enyi entropy on torus

We investigate the short interval expansion of the R\'enyi entropy for
two-dimensional conformal field theory (CFT) on a torus. We require the length
of the interval $\ell$ to be small with respect to the spatial and temporal
sizes of the torus. The operator product expansion of the twist operators
allows us to compute the short interval expansion of the R\'enyi entropy at any
temperature. In particular, we pay special attention to the large $c$ CFTs dual
to the AdS$_3$ gravity and its cousins. At both low and high temperature
limits, we read the R\'enyi entropies to order $\ell^6$, and find good
agreements with holographic results. Moreover, the expansion allows us to read
$1/c$ contribution, which is hard to get by expanding the thermal density
matrix. We generalize the study to the case with the chemical potential as
well.Comment: 19 pages; V2, 19 pages, typos corrected, published versio
Constrained superfields from an anti-D3-brane in KKLT

The KKLT construction of dS vacua relies on an uplift term that arises from
an anti-D3-brane. It was argued by Kachru, Pearson and Verlinde that this
anti-D3-brane is an excited state in a supersymmetric theory since it can decay
to a supersymmetric ground state. Hence the anti-D3-brane breaks supersymmetry
spontaneously and one should be able to package all the world-volume fields on
the anti-D3-brane into a four dimensional $\cal{N}=1$ supersymmetric action.
Here we extend previous results and identify the constrained superfields that
correspond to all the degrees of freedom on the anti-D3-brane. In particular,
we show explicitly that the four 4D worldvolume spinors give rise to
constrained chiral multiplets $S$ and $Y^i$, $i=1,2,3$ that satisfy
$S^2=SY^i=0$. We also conjecture (and provide evidence in a forthcoming
publication) that the vector field $A_\mu$ and the three scalars $\phi^i$ give
rise to a field strength multiplet $W_\alpha$ and three chiral multiplets $H^i$
that satisfy the constraints $S W_\alpha= \bar{D}_{\dot \alpha} (S \bar
H^i)=0$. This is the first time that such constrained multiplets appear in
string theory constructions.Comment: 20 pages, v2: references adde
The SU(2|3) dynamic two-loop form factors

We compute two-loop form factors of operators in the $SU(2|3)$ closed
subsector of $N=4$ supersymmetric Yang-Mills. In particular, we focus on the
non-protected, dimension-three operators $\mathrm{Tr} (X[Y,Z])$ and
$\mathrm{Tr} ( \psi \psi)$ for which we compute the four possible two-loop form
factors, and corresponding remainder functions, with external states $\langle
\bar{X} \bar{Y} \bar{Z}|$ and $\langle \bar{\psi} \bar{\psi}|$. Interestingly,
the maximally transcendental part of the two-loop remainder of $\langle\bar{X}
\bar{Y} \bar{Z}| \mathrm{Tr} (X[Y,Z]) |0\rangle$ turns out to be identical to
that of the corresponding known quantity for the half-BPS operator $\mathrm{Tr}
(X^3)$. We also find a surprising connection between the terms subleading in
transcendentality and certain a priori unrelated remainder densities introduced
in the study of the spin chain Hamiltonian in the SU(2) sector. Next, we use
our calculation to resolve the mixing, recovering anomalous dimensions and
eigenstates of the dilatation operator in the SU(2|3) sector at two loops. We
also speculate on potential connections between our calculations in $N=4$ super
Yang-Mills and Higgs + multi-gluon amplitudes in QCD in an effective Lagrangian
approach.Comment: 40+1 pages, v3: typos corrected, version published in JHE