pinecone/core-2020-05-10-deduplication huggingface dataset:
Fermion zero modes in the vortex background of a Chern-Simons-Higgs
  theory with a hidden sector

In this paper we study a $2+1$ dimensional system in which fermions are
coupled to the self-dual topological vortex in $U(1) \times U(1)$ Chern-Simons
theory, where both $U(1)$ gauge symmetries are spontaneously broken. We
consider two Abelian Higgs scalars with visible and hidden sectors coupled to a
fermionic field through three interaction Lagrangians, where one of them
violates the fermion number. Using a fine tuning procedure, we could obtain the
number of the fermionic zero modes which is equal to the absolute value of the
sum of the vortex numbers in the visible and hidden sectors.Comment: 10 page
Lax pairs on Yang-Baxter deformed backgrounds

We explicitly derive Lax pairs for string theories on Yang-Baxter deformed backgrounds, 1) gravity duals for noncommutative gauge theories, 2) γ-deformations of S[5], 3) Schrödinger spacetimes and 4) abelian twists of the global AdS[5]. Then we can find out a concise derivation of Lax pairs based on simple replacement rules. Furthermore, each of the above deformations can be reinterpreted as twisted boundary conditions with the undeformed background by using the rules. As another derivation, the Lax pair for gravity duals for noncommutative gauge theories is reproduced from the one for a q-deformed AdS[5]×S[5] by taking a scaling limit.
Keyword
Pure Gravities via Color-Kinematics Duality for Fundamental Matter

We give a prescription for the computation of loop-level scattering
amplitudes in pure Einstein gravity, and four-dimensional pure supergravities,
using the color-kinematics duality. Amplitudes are constructed using double
copies of pure (super-)Yang-Mills parts and additional contributions from
double copies of fundamental matter, which are treated as ghosts. The
opposite-statistics states cancel the unwanted dilaton and axion in the bosonic
theory, as well as the extra matter supermultiplets in supergravities. As a
spinoff, we obtain a prescription for obtaining amplitudes in supergravities
with arbitrary non-self-interacting matter. As a prerequisite, we extend the
color-kinematics duality from the adjoint to the fundamental representation of
the gauge group. We explain the numerator relations that the fundamental
kinematic Lie algebra should satisfy. We give nontrivial evidence supporting
our construction using explicit tree and loop amplitudes, as well as more
general arguments.Comment: 48 pages + refs, 15 figures, 3 tables; v2 minor corrections, journal
  versio
Anomalous transport at weak coupling

We evaluate the contribution of chiral fermions in d = 2, 4, 6, chiral bosons, a chiral gravitino like theory in d = 2 and chiral gravitinos in d = 6 to all the leading parity odd transport coefficients at one loop. This is done by using finite temperature field theory to evaluate the relevant Kubo formulae. For chiral fermions and chiral bosons the relation between the parity odd transport coefficient and the microscopic anomalies including gravitational anomalies agree with that found by using the general methods of hydrodynamics and the argument involving the consistency of the Euclidean vacuum. For the gravitino like theory in d = 2 and chiral gravitinos in d = 6, we show that relation between the pure gravitational anomaly and parity odd transport breaks down. From the perturbative calculation we clearly identify the terms that contribute to the anomaly polynomial, but not to the transport coefficient for gravitinos. We also develop a simple method for evaluating the angular integrals in the one loop diagrams involved in the Kubo formulae. Finally we show that charge diffusion mode of an ideal 2 dimensional Weyl gas in the presence of a finite chemical potential acquires a speed, which is equal to half the speed of light
Reduced LHC constraints for higgsino-like heavier electroweakinos

As a sequel to our earlier work on wino-dominated $\tilde \chi_1^{\pm}$ and
$\tilde \chi_2^{0}$ (wino models), we focus on the pMSSM models where $\tilde
\chi_1^{\pm}$ and $\tilde \chi_{2,3}^{0}$ are either higgsino dominated
(higgsino models) or admixtures of significant amount of higgsino and wino
components (mixed models), with or without light sleptons. The LHC constraints
in the trilepton channel are significantly weaker even in the presence of light
sleptons, especially in the higgsino models, compared to those mostly studied
by the LHC collaborations with wino-dominated $\tilde \chi_1^{\pm}$ and $\tilde
\chi_2^{0}$. The modes $\tilde \chi_{2,3}^{0}\rightarrow h~\tilde\chi_1^{0}$
with large branching ratios (BRs) are more common in the higgsino models and
may produce spectacular signal in the LHC Run-II. In a variety of higgsino and
mixed models we have delineated the allowed parameter space due to the LHC
constraints, the observed Dark Matter (DM) relic density of the universe, which
gets contributions from many novel DM producing mechanisms i.e., the
annihilation/coannihilation processes that lead to the correct range of relic
density, and the precise measurement of the anomalous magnetic moment of the
muon. In the higgsino models many new DM producing mechanisms, which are not
allowed in the wino models, open up. We have also explored the prospects of
direct and indirect detection of DM in the context of the LUX and IceCube
experiments respectively. In an extended model having only light gluinos in
addition to the electroweak sparticles, the gluinos decay into final states
with multiple taggable b-jets with very large BRs. As a consequence, the
existing ATLAS data in the $0l$ + jets (3b) + $E\!\!\!\!/_T$ channel provide
the best limit on $m_{\tilde g}$ ($\approx$ 1.3 TeV). Several novel signatures
of higgsino models for LHC Run-II and ILC have been identified.Comment: 55 pages, 13 figures, 10 tables. Version published in JHE
Light Charged Higgs Bosons to AW/HW via Top Decay

While current ATLAS and CMS measurements exclude a light charged Higgs
($m_{H^\pm}<160$ GeV) for most of the parameter region in the context of the
MSSM scenarios, these bounds are significantly weakened in the Type II 2HDM
once the exotic decay channel into a lighter neutral Higgs, $H^\pm \to AW/HW$,
is open. In this study, we examine the possibility of a light charged Higgs
produced in top decay via single top or top pair production, with the
subsequent decay $H^\pm \rightarrow AW/HW$, which can reach a sizable branching
fraction at low $\tan\beta$ once it is kinematically permitted. With a detailed
collider analysis, we obtain exclusion and discovery bounds for the 14 TeV LHC
assuming the existence of a 70 GeV neutral scalar. Assuming ${\rm BR}(H^\pm
\rightarrow AW/HW)=100\%$ and ${\rm BR}(A/H \rightarrow \tau\tau)=8.6\%$, the
95% exclusion limits on ${\rm BR}(t \rightarrow H^+ b)$ are about 0.2% and
0.03% for single top and top pair production respectively, with an integrated
luminosity of 300 ${\rm fb}^{-1}$. The discovery reaches are about 3 times
higher. In the context of the Type II 2HDM, discovery is possible at both large
$\tan\beta > 17$ for 155 GeV $< m_{H^\pm} <$ 165 GeV, and small $\tan\beta < 6$
over the entire mass range. Exclusion is possible in the entire $\tan\beta$
versus $m_{H^\pm}$ plane except for charged Higgs masses close to the top
threshold. The exotic decay channel $H^\pm \to AW/HW$ is therefore
complementary to the conventional $H^\pm \rightarrow \tau\nu$ channel.Comment: 21 pages. arXiv admin note: text overlap with arXiv:1408.411
Global fits of the two-loop renormalized Two-Higgs-Doublet model with
  soft $Z_2$ breaking

We determine the next-to-leading order renormalization group equations for
the Two-Higgs-Doublet model with a softly broken $Z_2$ symmetry and CP
conservation in the scalar potential. We use them to identify the parameter
regions which are stable up to the Planck scale and find that in this case the
quartic couplings of the Higgs potential cannot be larger than 1 in magnitude
and that the absolute values of the S-matrix eigenvalues cannot exceed 2.5 at
the electroweak symmetry breaking scale. Interpreting the 125 GeV resonance as
the light CP-even Higgs eigenstate, we combine stability constraints,
electroweak precision and flavour observables with the latest ATLAS and CMS
data on Higgs signal strengths and heavy Higgs searches in global parameter
fits to all four types of $Z_2$ symmetry. We quantify the maximal deviations
from the alignment limit and find that in type II and Y the mass of the heavy
CP-even (CP-odd) scalar cannot be smaller than 340 GeV (360 GeV). Also, we
pinpoint the physical parameter regions compatible with a stable scalar
potential up to the Planck scale. Motivated by the question how natural a Higgs
mass of 125 GeV can be in the context of a Two-Higgs-Doublet model, we also
address the hierarchy problem and find that the Two-Higgs-Doublet model does
not offer a perturbative solution to it beyond 5 TeV.Comment: 30 pages, 29 figures. Major update of the experimental inputs;
  references adde
Detecting underabundant neutralinos

The electroweak sector may play a crucial role in discovering supersymmetry.
We systematically investigate the patterns of the MSSM-like electroweakinos,
when the neutralino relic abundance $\Omega_\chi h^2\leq 0.12$, that is, also
admitting for multi-component Dark Matter, in a broad range of the parameter
space. We find that for a very large range of parameters the Direct Detection
experiments are/will be sensitive to underabundant neutralinos, in spite of the
strong rescaling of the flux factor. The second general conclusion is that the
bound $\Omega_\chi h^2\leq 0.12$ together with the LUX (XENON1T) limits for the
neutralino spin independent scattering cross sections constrain the
electroweakino spectrum so that the mass differences between the NLSP and the
LSP are smaller than 40 (10) GeV, respectively, with important implications for
the collider searches. The future Direct Detection experiments and the high
luminosity LHC run will probe almost the entire range of the LSP and NLSP mass
spectrum that is consistent with the bound $\Omega_\chi h^2\leq 0.12$.Comment: 36 pages, 15 figure
EFT for Vortices with Dilaton-dependent Localized Flux

We study how codimension-two objects like vortices back-react gravitationally
with their environment in theories (such as 4D or higher-dimensional
supergravity) where the bulk is described by a dilaton-Maxwell-Einstein system.
We do so both in the full theory, for which the vortex is an explicit classical
`fat brane' solution, and in the effective theory of `point branes' appropriate
when the vortices are much smaller than the scales of interest for their
back-reaction (such as the transverse Kaluza-Klein scale). We extend the
standard Nambu-Goto description to include the physics of flux-localization
wherein the ambient flux of the external Maxwell field becomes partially
localized to the vortex, generalizing the results of a companion paper to
include dilaton-dependence for the tension and localized flux. In the effective
theory, such flux-localization is described by the next-to-leading effective
interaction, and the boundary conditions to which it gives rise are known to
play an important role in how (and whether) the vortex causes supersymmetry to
break in the bulk. We track how both tension and localized flux determine the
curvature of the space-filling dimensions. Our calculations provide the tools
required for computing how scale-breaking vortex interactions can stabilize the
extra-dimensional size by lifting the dilaton's flat direction. For small
vortices we derive a simple relation between the near-vortex boundary
conditions of bulk fields as a function of the tension and localized flux in
the vortex action that provides the most efficient means for calculating how
physical vortices mutually interact without requiring a complete construction
of their internal structure. In passing we show why a common procedure for
doing so using a $\delta$-function can lead to incorrect results. Our
procedures generalize straightforwardly to general co-dimension objects.Comment: 45 pages + appendix, 6 figure
One-loop analysis of the interactions between charmed mesons and Goldstone bosons

We derive the scattering amplitude for Goldstone bosons of chiral symmetry off the pseudoscalar charmed mesons up to leading one-loop order in a covariant chiral effective field theory, using the so-called extended-on-mass-shell renormalization scheme. Then we use unitarized chiral perturbation theory to fit to the available lattice data of the S-wave scattering lengths. The lattice data are well described. However, most of the low-energy constants determined from the fit bear large uncertainties. Lattice simulations in more channels are necessary to pin down these values which can then be used to make predictions in other processes related by chiral and heavy quark symmetries
Applying EFT to Higgs Pair Production in Universal Extra Dimensions

We investigate single Higgs and Higgs pair production at the LHC in models of
Universal Extra Dimensions. After calculating the relevant cross sections, we
use the UED model as a testing ground for the Effective Field Theory approach
to physics beyond the Standard Model. We show how the UED contributions to
Higgs production can be matched to a dimension-6 operator. We then discuss the
range of validity of this approach, in particular for Higgs pair production,
and determine the sensitivity to the number of KK modes in the loop.Comment: 13 pages, 8 figure
Holographic description of non-supersymmetric orbifolded D1-D5-P
  solutions

Non-supersymmetric black hole microstates are of great interest in the
context of the black hole information paradox. We identify the holographic
description of the general class of non-supersymmetric orbifolded D1-D5-P
supergravity solutions found by Jejjala, Madden, Ross and Titchener. This class
includes both completely smooth solutions and solutions with conical defects,
and in the near-decoupling limit these solutions describe degrees of freedom in
the cap region. The CFT description involves a general class of states obtained
by fractional spectral flow in both left-moving and right-moving sectors,
generalizing previous work which studied special cases in this class. We
compute the massless scalar emission spectrum and emission rates in both
gravity and CFT and find perfect agreement, thereby providing strong evidence
for our proposed identification. We also investigate the physics of ergoregion
emission as pair creation for these orbifolded solutions. Our results represent
the largest class of non-supersymmetric black hole microstate geometries with
identified CFT duals presently known.Comment: 35 pages, v2: comments added, typos corrected, reference adde
Wilson Loops and Chiral Correlators on Squashed Sphere

We study chiral deformations of ${\cal N}=2$ and ${\cal N}=4$ supersymmetric
gauge theories obtained by turning on $\tau_J \,{\rm tr} \, \Phi^J$
interactions with $\Phi$ the ${\cal N}=2$ superfield. Using localization, we
compute the deformed gauge theory partition function $Z(\vec\tau|q)$ and the
expectation value of circular Wilson loops $W$ on a squashed four-sphere. In
the case of the deformed ${\cal N}=4$ theory, exact formulas for $Z$ and $W$
are derived in terms of an underlying $U(N)$ interacting matrix model replacing
the free Gaussian model describing the ${\cal N}=4$ theory. Using the AGT
correspondence, the $\tau_J$-deformations are related to the insertions of
commuting integrals of motion in the four-point CFT correlator and chiral
correlators are expressed as $\tau$-derivatives of the gauge theory partition
function on a finite $\Omega$-background. In the so called Nekrasov-Shatashvili
limit, the entire ring of chiral relations is extracted from the
$\epsilon$-deformed Seiberg-Witten curve. As a byproduct of our analysis we
show that $SU(2)$ gauge theories on rational $\Omega$-backgrounds are dual to
CFT minimal models.Comment: 33 pages, 2 figure, in this version we have added two new references
  and a detailed comparison with the results obtained in one of these tw
Statistics of Flux Vacua for Particle Physics

Supersymmetric flux compactification of F-theory in the geometric phase
yields numerous vacua, and provides an ensemble of low-energy effective
theories with different symmetry, matter multiplicity and Lagrangian
parameters. Theoretical tools have already been developed so that we can study
how the statistics of flux vacua depend on the choice of symmetry and some of
Lagrangian parameters. In this article, we estimate the fraction of i) vacua
that have a U(1) symmetry for spontaneous R-parity violation, and ii) those
that realise ideas which achieve hierarchical eigenvalues of the Yukawa
matrices. We also learn a lesson that the number of flux vacua is reduced very
much when the unbroken $U(1)_Y$ symmetry is obtained from a non-trivial
Mordell--Weil group, while it is not when $U(1)_Y$ is in SU(5) unification. It
also turns out that vacua with an approximate U(1) symmetry forms a locus of
accumulation points of the flux vacua distribution.Comment: 51 page
Semiclassical description of soliton-antisoliton pair production in
  particle collisions

We develop a consistent semiclassical method to calculate the probability of
topological soliton-antisoliton pair production in collisions of elementary
particles. In our method one adds an auxiliary external field pulling the
soliton and antisoliton in the opposite directions. This transforms the
original scattering process into a Schwinger pair creation of the solitons
induced by the particle collision. One describes the Schwinger process
semiclassically and recovers the original scattering probability in the limit
of vanishing external field. We illustrate the method in (1+1)-dimensional
scalar field model where the suppression exponents of soliton-antisoliton
production in the multiparticle and two-particle collisions are computed
numerically.Comment: 55 pages, 30 figures; journal versio
Exotic Higgs Decay via Charged Higgs

The most common search channel for heavy neutral Higgses in models with an
extension of the Standard Model Higgs sector is $A/H^0\rightarrow \tau\tau$,
which becomes ineffective when new decay modes of $A/H^0$ open. In this paper,
we analyzed two such channels involving charged Higgses in the final states:
$A/H^0 \rightarrow W^\pm H^\mp$ and $H^0 \rightarrow H^+H^-$. With the
consequent decay of $H^\pm\rightarrow \tau\nu$, we found that the limits for
$\sigma\times{BR}(gg \rightarrow A/H^0 \rightarrow W^\pm H^\mp)\times
{BR}(H^\pm \rightarrow \tau \nu)$ vary from 30 to 10 fb for $m_{A/H^0}$ between
300 and 1000 GeV for 95% C.L. exclusion, and about 80 to 30 fb for 5$\sigma$
discovery. For $H^+H^-$ mode, 95% C.L. limits on $\sigma\times {BR}(gg\to
H^0\to H^+ H^-)\times {BR}^2(H^\pm\to \tau\nu)$ vary from 9 to 4 fb for
$m_{H^0}$ between 400 and 1000 GeV, while the 5$\sigma$ reach is about 20 to 10
fb. We further interpret the cross section limits in the Type II 2HDM parameter
space. While $A\rightarrow W^\pm H^\mp$ offers great sensitivity in both
$\sin(\beta-\alpha)$ versus $\tan\beta$ and $m_A$ versus $\tan\beta$ parameter
space, $H^0\rightarrow H^+ H^-$ can cover most of the parameter space for
$H^0$. Reach in $H^0\rightarrow W^\pm H^\mp$ is more limited, especially for
$m_{H^0}>2 m_{H^\pm}$. It is, however, complementary to $H^0\rightarrow H^+
H^-$ when ${BR}(H^0\rightarrow H^+ H^-)$ is accidentally suppressed.Comment: 19 pages, 11 figures, version appear in JHE
Noncommutative U(1) gauge theory from a worldline perspective

We study pure noncommutative U(1) gauge theory representing its one-loop
effective action in terms of a phase space worldline path integral. We write
the quadratic action using the background field method to keep explicit gauge
invariance, and then employ the worldline formalism to write the one-loop
effective action, singling out UV-divergent parts and finite (planar and
non-planar) parts, and study renormalization properties of the theory. This
amounts to employ worldline Feynman rules for the phase space path integral,
that nicely incorporate the Fadeev-Popov ghost contribution and efficiently
separate planar and non-planar contributions. We also show that the effective
action calculation is independent of the choice of the worldline Green's
function, that corresponds to a particular way of factoring out a particle
zero-mode. This allows to employ homogeneous string-inspired Feynman rules that
greatly simplify the computation.Comment: 27+1 pages. Minor corrections; matches published versio
Power-law expansion of the Universe from the bosonic Lorentzian type IIB
  matrix model

Recent studies on the Lorentzian version of the type IIB matrix model show
that (3+1)D expanding universe emerges dynamically from (9+1)D space-time
predicted by superstring theory. Here we study a bosonic matrix model obtained
by omitting the fermionic matrices. With the adopted simplification and the
usage of a large-scale parallel computer, we are able to perform Monte Carlo
calculations with matrix size up to $N=512$, which is twenty times larger than
that used previously for the studies of the original model. When the matrix
size is larger than some critical value $N_{\rm c}\simeq 110$, we find that
(3+1)D expanding universe emerges dynamically with a clear large-$N$ scaling
property. Furthermore, at sufficiently late times, we observe a power-law
behavior $t^{1/2}$ of the spatial extent with respect to time $t$, which is
reminiscent of the expanding behavior of the Friedmann-Robertson-Walker
universe in the radiation dominated era. We discuss possible implications of
this result on the original model including fermionic matrices.Comment: 22 pages, 21 figures, 4 tables, (v2) typos correcte
Small Winding-Number Expansion: Vortex Solutions at Critical Coupling

We study an axially symmetric solution of a vortex in the Abelian-Higgs model
at critical coupling in detail. Here we propose a new idea for a perturbative
expansion of a solution, where the winding number of a vortex is naturally
extended to be a real number and the solution is expanded with respect to it
around its origin. We test this idea on three typical constants contained in
the solution and confirm that this expansion works well with the help of the
Pad\'e approximation. For instance, we analytically reproduce the value of the
scalar charge of the vortex with an error of $O(10^{-6})$. This expansion is
also powerful even for large winding numbers.Comment: 38 pages,48 figure
Higgs Flavor Violation as a Signal to Discriminate Models

We consider the Higgs Lepton Flavor Violating process $h \rightarrow \tau
\mu$, in which CMS found a $2.5 \sigma$ excess of events, from a model
independent perspective, and find that it is difficult to generate this
operator without also obtaining a sizeable Wilson coefficient for the dipole
operators responsible for tau radiative decay, constrained by BABAR to
${BR}(\tau \rightarrow \mu \gamma)< 4.4 \times 10^{-8} $. We then survey a set
of representative models for new physics, to determine which ones are capable
of evading this problem. We conclude that, should this measurement persist as a
signal, type-III Two Higgs Doublet Models and Higgs portal-like models are
favored, while SUSY and Composite Higgs models are unlikely to explain it.Comment: 21 pages, 7 figures; update: minor typo correction and references
  added, formatted for submission to JHE
On modular completion of generalized flux orbits

In the context of type IIB orientifold compactification with the presence of
(non-)geometric fluxes, we conjecture a modular completed version of the
generalized flux-orbits of various NS-NS and RR fluxes. Subsequently,
considering two explicit examples with frozen complex structure moduli, we
illustrate the utility of these new flux orbits in a very compact rearrangement
of the four dimensional effective scalar potential.Comment: version 4: minor improvements, references added, and to appear in
  JHE