pinecone/core-2020-05-10-deduplication huggingface dataset:
Yang--Mills Glueballs as Closed Bosonic Strings

We put forward the Axionic String Ansatz (ASA), which provides a unified
description for the worldsheet dynamics of confining strings in pure
Yang--Mills theory both in $D=3$ and $D=4$ space-time dimensions. The ASA is
motivated by the excitation spectrum of long confining strings, as measured on
a lattice, and by recently constructed integrable axionic non-critical string
models. According to the ASA, pure gluodynamics in 3D is described by a
non-critical bosonic string theory without any extra local worldsheet degrees
of freedom. We argue that this assumption fixes the set of quantum numbers
(spins, $P$- and $C$-parities) of almost all glueball states. We confront the
resulting predictions with the properties of approximately $1^2+2^2+3^2+5^2=39$
lightest glueball states measured on a lattice and find a good agreement. On
the other hand, the spectrum of low lying glueballs in 4D gluodynamics suggests
the presence of a massive pseudoscalar mode on the string worldsheet, in
agreement with the ASA and lattice data for long strings.Comment: 36 pages, 6 figures; v2: typos corrected, a few comments adde
Algebraic properties of the monopole formula

The monopole formula provides the Hilbert series of the Coulomb branch for a
3-dimensional N=4 gauge theory. Employing the concept of a fan defined by the
matter content, and summing over the corresponding collection of monoids,
allows the following: firstly, we provide explicit expressions for the Hilbert
series for any gauge group. Secondly, we prove that the order of the pole at
t=1 and t=infinity equals the complex or quaternionic dimension of the moduli
space, respectively. Thirdly, we determine all bare and dressed BPS monopole
operators that are sufficient to generate the entire chiral ring. As an
application, we demonstrate the implementation of our approach to computer
algebra programs and the applicability to higher rank gauge theories.Comment: v2: 37 pages, 7 figures, 6 tables; matches JHEP versio
Two-Loop Beam and Soft Functions for Rapidity-Dependent Jet Vetoes

Jet vetoes play an important role in many analyses at the LHC. Traditionally,
jet vetoes have been imposed using a restriction on the transverse momentum
$p_{Tj}$ of jets. Alternatively, one can also consider jet observables for
which $p_{Tj}$ is weighted by a smooth function of the jet rapidity $y_j$ that
vanishes as $|y_j| \to \infty$. Such observables are useful as they provide a
natural way to impose a tight veto on central jets but a looser one at forward
rapidities. We consider two such rapidity-dependent jet veto observables,
$\mathcal{T}_{Bj}$ and $\mathcal{T}_{Cj}$, and compute the required beam and
dijet soft functions for the jet-vetoed color-singlet production cross section
at two loops. At this order, clustering effects from the jet algorithm become
important. The dominant contributions are computed fully analytically while
corrections that are subleading in the limit of small jet radii are expressed
in terms of finite numerical integrals. Our results enable the full NNLL'
resummation and are an important step towards N3LL resummation for cross
sections with a $\mathcal{T}_{Bj}$ or $\mathcal{T}_{Cj}$ jet veto.Comment: 34 pages, 1 figur
Sgluons in the same-sign lepton searches

In this work I present the interpretation of the ATLAS search of same-sign
lepton production in association with $b$-jets in the context of the 4-top
quark signal from sgluon decays. I show that using just 3.2/fb data sample from
Run 2 the exclusion limit is already competitive with the Run 1 one. Public
data allow to exclude sgluons with masses up to 0.95 TeV. Prospects for the
total Run 2 integrated luminosity of 100/fb are briefly discussed.Comment: added missing ancillary materials, corrected error in scale variation
  band in Fig. 3, added 1 new reference, updated Monte Carlo statistic
Theta dependence in Holographic QCD

We study the effects of the CP-breaking topological $\theta$-term in the
large $N_c$ QCD model by Witten, Sakai and Sugimoto with $N_f$ degenerate light
flavors. We first compute the ground state energy density, the topological
susceptibility and the masses of the lowest lying mesons, finding agreement
with expectations from the QCD chiral effective action. Then, focusing on the
$N_f=2$ case, we consider the baryonic sector and determine, to leading order
in the small $\theta$ regime, the related holographic instantonic soliton
solutions. We find that while the baryon spectrum does not receive ${\cal
O}(\theta)$ corrections, this is not the case for observables like the
electromagnetic form factor of the nucleons. In particular, it exhibits a
dipole term, which turns out to be vector-meson dominated. The resulting
neutron electric dipole moment, which is exactly the opposite as that of the
proton, is of the same order of magnitude of previous estimates in the
literature. Finally, we compute the CP-violating pion-nucleon coupling constant
${\bar g}_{\pi N N}$, finding that it is zero to leading order in the large
$N_c$ limit.Comment: Latex, 61 pages, 5 figures; v2: Section 8.5 with a novel analysis of
  the electric dipole form factor has been added; further comments and
  references added; typos correcte
Inverse Magnetic Catalysis in the Soft-Wall Model of AdS/QCD

Magnetic effects on chiral phase transition have been investigated in a
modified soft-wall AdS/QCD model, in which the dilaton field is taken to be
negative at the ultraviolet region and positive at the infrared region as in
Phys.Rev.D93(2016),101901 and JHEP1604(2016)036. The magnetic field is
introduced into the background geometry by solving the Einstein-Maxwell system.
After embedding the magnetized background geometry into the modified soft-wall
model, the magnetic field dependent behavior of chiral condensate is worked out
numerically. It is found that, in the chiral limit, the chiral phase transition
remains as a second order at finite magnetic field $B$, while the symmetry
restoration temperature and chiral condensate decrease with the increasing of
magnetic field in small $B$ region. When including finite quark mass effect,
the phase transition turns to be a crossover one, and the transition
temperature still decreases with increasing magnetic field $B$ when $B$ is not
very large. In this sense, inverse magnetic catalysis effect is observed in
this modified soft-wall AdS/QCD model.Comment: 18 pages, 6 figures, regular articl
Right-handed neutrino dark matter under the B-L gauge interaction

We study the right-handed neutrino (RHN) dark matter candidate in the minimal
U(1)_{B-L} gauge extension of the standard model. The U(1)_{B-L} gauge symmetry
offers three RHNs which can address the origin of the neutrino mass, the relic
dark matter, and the matter-antimatter asymmetry of the universe. The lightest
among the three is taken as the dark matter candidate, which is under the B-L
gauge interaction. We investigate various scenarios for this dark matter
candidate with the correct relic density by means of the freeze-out or
freeze-in mechanism. A viable RHN dark matter mass lies in a wide range
including keV to TeV scale. We emphasize the sub-electroweak scale light B-L
gauge boson case, and identify the parameter region motivated from the dark
matter physics, which can be tested with the planned experiments including the
CERN SHiP experiment.Comment: Version accepted for publication in JHE
Butterfly Effect and Holographic Mutual Information under External Field
  and Spatial Noncommutativity

We apply the transformation of mixing azimuthal and internal coordinate or
mixing time and internal coordinate to a stack of N black M-branes to find the
Melvin spacetime of a stack of N black D-branes with magnetic or electric flux
in string theory, after the Kaluza-Klein reduction. We slightly extend previous
formulas to investigate the external magnetic and electric effects on the
butterfly effect and holographic mutual information. It shows that the Melvin
fields do not modify the scrambling time and will enhance the mutual
information. In addition, we also T-dualize and twist a stack of N black
D-branes to find a Melvin Universe supported by the flux of the NSNS b-field,
which describes a non-comutative spacetime. It also shows that the spatial
noncommutativity does not modify the scrambling time and will enhance the
mutual information. We also study the corrected mutual information in the
backreaction geometry due to the shock wave in our three model spacetimes.Comment: 22 pages, 14 figure
Stellar cooling bounds on new light particles: plasma mixing effects

Strong constraints on the coupling of new light particles to the Standard
Model (SM) arise from their production in the hot cores of stars, and the
effects of this on stellar cooling. For new light particles which have an
effective in-medium mixing with the photon, plasma effects can result in
parametrically different production rates to those obtained from a naive
calculation. Taking these previously-neglected contributions into account, we
make updated estimates for the stellar cooling bounds on light scalars and
vectors with a variety of SM couplings. In particular, we improve the bounds on
light (m <~ keV) scalars coupling to electrons or nucleons by up to 3 orders of
magnitude in the coupling squared, significantly revise the supernova cooling
bounds on dark photon couplings, and qualitatively change the mass dependence
of stellar bounds on new vectors. Scalars with mass <~ 2 keV that couple
through the Higgs portal are constrained to mixing angle <~ 3*10^-10, which
gives the dominant bound for scalar masses above ~ 0.2 eV.Comment: 36 pages, 7 figures; explanations clarified, results unchanged;
  matches version published in JHE
Softness and Amplitudes' Positivity for Spinning Particles

We derive positivity bounds for scattering amplitudes of particles with
arbitrary spin using unitarity, analyticity and crossing symmetry. The bounds
imply the positivity of certain low-energy coefficients of the effective action
that controls the dynamics of the light degrees of freedom. We show that
low-energy amplitudes strictly softer than $O(p^4)$ do not admit unitary
ultraviolet completions unless the theory is free. This enforces a bound on the
energy growth of scattering amplitudes in the region of validity of the
effective theory. We discuss explicit examples including the Goldstino from
spontaneous supersymmetry breaking, and the theory of a spin-1/2 fermion with a
shift symmetry.Comment: 28 pages + refs and 3 appendices, 2 figures; v2: extra refs, improved
  discussions, typos fixed, accepted on JHE
Hilbert series and mixed branches of $T[SU(N)]$ theory

We consider mixed branches of 3d $\mathcal{N}=4$ $T[SU(N)]$ theory. We
compute the Hilbert series of the Coulomb branch part of the mixed branch from
a restriction rule acting on the Hilbert series of the full Coulomb branch that
will truncate the magnetic charge summation only to the subset of BPS dressed
monopole operators that arise in the Coulomb branch sublocus where the mixed
branch stems. This restriction can be understood directly from the type IIB
brane picture by a relation between the magnetic charges of the monopoles and
brane position moduli. We also apply the restriction rule to the Higgs branch
part of a given mixed branch by exploiting 3d mirror symmetry. Both cases show
complete agreement with the results calculated by different methods.Comment: 44 pages, 26 figures, 5 table
Collinear limits beyond the leading order from the scattering equations

The structure of tree-level scattering amplitudes for collinear massless
bosons is studied beyond their leading splitting function behavior. These
near-collinear limits at sub-leading order are best studied using the
Cachazo-He-Yuan (CHY) formulation of the S-matrix based on the scattering
equations. We compute the collinear limits for gluons, gravitons and scalars.
It is shown that the CHY integrand for an n-particle gluon scattering amplitude
in the collinear limit at sub-leading order is expressed as a convolution of an
(n-1)-particle gluon integrand and a collinear kernel integrand, which is
universal. Our representation is shown to obey recently proposed amplitude
relations in which the collinear gluons of same helicity are replaced by a
single graviton. Finally, we extend our analysis to effective field theories
and study the collinear limit of the non-linear sigma model,
Einstein-Maxwell-Scalar and Yang-Mills-Scalar theory.Comment: 38 page
The star-triangle relation, lens partition function, and hypergeometric
  sum/integrals

The aim of the present paper is to consider the hyperbolic limit of an
elliptic hypergeometric sum/integral identity, and associated lattice model of
statistical mechanics previously obtained by the second author. The hyperbolic
sum/integral identity obtained from this limit, has two important physical
applications in the context of the so-called gauge/YBE correspondence. For
statistical mechanics, this identity is equivalent to a new solution of the
star-triangle relation form of the Yang-Baxter equation, that directly
generalises the Faddeev-Volkov models to the case of discrete and continuous
spin variables. On the gauge theory side, this identity represents the duality
of lens ($S_b^3/\mathbb{Z}_r$) partition functions, for certain
three-dimensional $\mathcal N = 2$ supersymmetric gauge theories.Comment: 42 pages, 4 figure
Matrix Thermalization

Matrix quantum mechanics offers an attractive environment for discussing
gravitational holography, in which both sides of the holographic duality are
well-defined. Similarly to higher-dimensional implementations of holography,
collapsing shell solutions in the gravitational bulk correspond in this setting
to thermalization processes in the dual quantum mechanical theory. We construct
an explicit, fully nonlinear supergravity solution describing a generic
collapsing dilaton shell, specify the holographic renormalization prescriptions
necessary for computing the relevant boundary observables, and apply them to
evaluating thermalizing two-point correlation functions in the dual matrix
theory.Comment: 39 pages, 2 figures; v2: references added; v3: added appendix
  containing the computation of one-point functions, published versio
Chiral phase transition of QCD with $N_f=2+1$ flavors from holography

Chiral phase transition for three-flavor $N_f=2+1$ QCD with $m_u=m_d\neq m_s$
is investigated in a modified soft-wall holographic QCD model. Solving
temperature dependent chiral condensates from equations of motion of the
modified soft-wall model, we extract the quark mass dependence of the order of
chiral phase transition in the case of $N_f=2+1$, and the result is in
agreement with the "Colombia Plot", which is summarized from lattice
simulations and other non-perturbative methods. First order phase transition is
observed around the three flavor chiral limit $m_{u/d}=0, m_{s}=0$, while at
sufficient large quark masses it turns to be a crossover phase transition. The
first order and crossover regions are separated by a second order phase
transition line. The second order line is divided into two parts by the
$m_{u/d}=m_s$ line, and the $m_s$ dependence of the transition temperature in
these two parts are totally contrast, which might indicate that the two parts
are governed by different universality classes.Comment: Regular article, 18 page
Sterile neutrino portal to Dark Matter I: The $U(1)_{B-L}$ case

In this paper we explore the possibility that the sterile neutrino and Dark
Matter sectors in the Universe have a common origin. We study the consequences
of this assumption in the simple case of coupling the dark sector to the
Standard Model via a global $U(1)_{B-L}$, broken down spontaneously by a dark
scalar. This dark scalar provides masses to the dark fermions and communicates
with the Higgs via a Higgs portal coupling. We find an interesting interplay
between Dark Matter annihilation to dark scalars - the CP-even that mixes with
the Higgs and the CP-odd which becomes a Goldstone boson, the Majoron - and
heavy neutrinos, as well as collider probes via the coupling to the Higgs.
Moreover, Dark Matter annihilation into sterile neutrinos and its subsequent
decay to gauge bosons and quarks, charged leptons or neutrinos lead to indirect
detection signatures which are close to current bounds on the gamma ray flux
from the galactic center and dwarf galaxies.Comment: Matches the published version. References added. Improved discussion
  and figures. Conclusions unchange
Miniclusters in the Axiverse

If dark matter is an axion-like-particle a significant fraction of the
present day relic abundance could be concentrated in compact gravitationally
bound miniclusters. We study the minicluster masses compatible with the dark
matter relic density constraint. If they form from fluctuations produced by PQ
symmetry breaking, minicluster masses up to hundreds of solar masses are
possible, although over most of the parameter space they are much lighter. The
size of these objects is typically within a few orders of magnitude of an
astronomical unit. We also show that miniclusters can form if an axion gets
mass from a hidden sector with a first order phase transition that takes a
relatively long time to complete. Therefore they can appear in models where PQ
symmetry is broken before inflation, compatible with large axion decay
constants and string theory UV completions.Comment: 19 pages, 7 figures, JHEP versio
Enhanced Higgs associated production with a top quark pair in the NMSSM
  with light singlets

Precision measurements of the 125 GeV Higgs resonance recently discovered at
the LHC have determined that its properties are similar to the ones of the
Standard Model (SM) Higgs boson. However, the current uncertainties in the
determination of the Higgs boson couplings leave room for significant
deviations from the SM expectations. In fact, if one assumes no correlation
between the top-quark and gluon couplings to the Higgs, the current global fit
to the Higgs data lead to central values of the Higgs couplings to the
bottom-quark and the top-quark that are about 2 $\sigma$ away from the SM
predictions. In a previous work, we showed that such a scenario could be
realized in the Next to Minimal Supersymmetric extension of the SM (NMSSM), for
heavy singlets and light MSSM-like Higgs bosons and scalar top quarks, but for
couplings that ruined the perturbative consistency of the theory up to the GUT
scale. In this work we show that a perturbative consistent scenario, for
somewhat heavier stops, may be obtained in the presence of light singlets. An
interesting bonus of this scenario is the possibility of explaining an excess
of events observed in CP-even Higgs searches at LEP2.Comment: 17 pages; v2: discussion on unphysical global minima and new
  benchmark table added; matches published versio
Present Status and Future Tests of the Higgsino-Singlino Sector in the
  NMSSM

The light higgsino-singlino scenario of the NMSSM allows to combine a
naturally small $\mu$ parameter with a good dark matter relic density. Given
the new constraints on spin-dependent and spin-independent direct detection
cross sections in 2016 we study first which regions in the plane of chargino-
and LSP-masses below 300 GeV remain viable. Subsequently we investigate the
impact of searches for charginos and neutralinos at the LHC, and find that the
limits from run I do not rule out any additional region in this plane. Only the
HL-LHC at 3000 fb$^{-1}$ will test parts of this plane corresponding to
higgsino-like charginos heavier than 150 GeV and relatively light singlinos,
but notably the most natural regions with lighter charginos seem to remain
unexplored.Comment: 16 pages, 2 figures, added discussion on the remaining fine-tunin
Spontaneously Broken Asymptotic Symmetries and an Effective Action for
  Horizon Dynamics

Asymptotic spacetime symmetries have been conjectured to play an important
role in quantum gravity. In this paper we study the breaking of asymptotic
symmetries associated with a null horizon boundary. In two-dimensions, these
symmetries are reparametrizations of the time parameter on the horizon. We show
how this horizon reparametrization symmetry is explicitly and spontaneously
broken in dilaton gravity and construct an effective action for these
pseudo-Goldstone modes using the on-shell gravitational action for a null
boundary. The variation of this action yields the horizon constraint equation.
This action is invariant under a 2 parameter subgroup of $SL(2)$
transformations, whose Noether charges we interpret via the membrane paradigm.
We place these results in the context of recent work on the near $AdS_2$/ near
$CFT_1$ correspondence. In this setting the horizon action characterizes the
infrared regime near the horizon and has a hydrodynamical sigma model form. We
also discuss our construction in General Relativity. In the three-dimensional
case there is a natural generalization of our results. However, in higher
dimensions, the variation of the effective action only yields the Raychaudhuri
equation for small perturbations of the horizon.Comment: 25 pages, v2: added reference, minor editin
Higgs production in association with off-shell top-antitop pairs at NLO
  EW and QCD at the LHC

We present NLO electroweak corrections to Higgs production in association
with off-shell top-antitop quark pairs. The full process
$\text{p}\text{p}\to\text{e}^+\nu_{\text{e}}
\mu^-\bar{\nu}_\mu\text{b}\bar{\text{b}} \text{H}$ is considered, and hence all
interference, off-shell, and non-resonant contributions are taken into account.
The electroweak corrections turn out to be below one per cent for the
integrated cross section but can exceed $10\%$ in certain phase-space regions.
In addition to its phenomenological relevance, the computation constitutes a
major technical achievement as the full NLO virtual corrections involving up to
9-point functions have been computed exactly. The results of the full
computation are supported by two calculations in the double-pole approximation.
These also allow to infer the effect of off-shell contributions and emphasise
their importance especially for the run II of the LHC. Finally, we present
combined predictions featuring both NLO electroweak and QCD corrections in a
common set-up that will help the experimental collaborations in their quest of
precisely measuring the aforementioned process.Comment: 28 pages, 40 eps-figures. Matches the published version. arXiv admin
  note: text overlap with arXiv:1607.0557
Exclusive photoproduction of a $\gamma\,\rho$ pair with a large
  invariant mass

Exclusive photoproduction of a $\gamma\,\rho$ pair in the kinematics where
the pair has a large invariant mass and the final nucleon has a small
transverse momentum is described in the collinear factorization framework. The
scattering amplitude is calculated at leading order in $\alpha_s$ and the
differential cross sections for the process where the $\rho-$meson is either
longitudinally or transversely polarized are estimated in the kinematics of the
JLab 12-GeV experiments.Comment: published version; 54 pages, 23 figures. The cross section for the
  exclusive photoproduction of a $\gamma\,\rho$ pair, in the case where the
  final $\rho$-meson is longitudinally polarized, has been correcte
Deconfinement, chiral transition and localisation in a QCD-like model

We study the problems of deconfinement, chiral symmetry restoration and
localisation of the low Dirac eigenmodes in a toy model of QCD, namely
unimproved staggered fermions on lattices of temporal extension $N_T=4$. This
model displays a genuine deconfining and chirally-restoring first-order phase
transition at some critical value of the gauge coupling. Our results indicate
that the onset of localisation of the lowest Dirac eigenmodes takes place at
the same critical coupling where the system undergoes the first-order phase
transition. This provides further evidence of the close relation between
deconfinement, chiral symmetry restoration and localisation of the low modes of
the Dirac operator on the lattice.Comment: 1+17 pages, 9 figures; revised introduction, minor changes in
  figures, new references added; matches published versio