pinecone/core-2020-05-10-deduplication huggingface dataset:
Supersymmetric Localization for BPS Black Hole Entropy: 1-loop Partition
  Function from Vector Multiplets

We use the techniques of supersymmetric localization to compute the BPS black
hole entropy in N=2 supergravity. We focus on the n_v+1 vector multiplets on
the black hole near horizon background which is AdS_2 x S^2 space. We find the
localizing saddle point of the vector multiplets by solving the localization
equations, and compute the exact one loop partition function on the saddle
point. Furthermore, we propose the appropriate functional integration measure.
Through this measure, the one loop determinant is written in terms of the
radius of the physical metric, which depends on the localizing saddle point
value of the vector multiplets. The result for the one loop determinant is
consistent with the logarithmic corrections to the BPS black hole entropy from
vector multiplets.Comment: 28+16 pages, improved discussion on the boundary mode in the 4.2 and
  conclusion sectio
Virasoro Conformal Blocks and Thermality from Classical Background
  Fields

We show that in 2d CFTs at large central charge, the coupling of the stress
tensor to heavy operators can be re-absorbed by placing the CFT in a
non-trivial background metric. This leads to a more precise computation of the
Virasoro conformal blocks between heavy and light operators, which are shown to
be equivalent to global conformal blocks evaluated in the new background. We
also generalize to the case where the operators carry U(1) charges. The refined
Virasoro blocks can be used as the seed for a new Virasoro block recursion
relation expanded in the heavy-light limit. We comment on the implications of
our results for the universality of black hole thermality in $AdS_3$, or
equivalently, the eigenstate thermalization hypothesis for $CFT_2$ at large
central charge.Comment: 27+7 pages, 3 figures; typos corrected, citations adde
Composite scalars at the LHC: the Higgs, the Sextet and the Octet

We present a phenomenological theory of scalar particles that transform as a
sextet and an octet of QCD interactions. These particles may arise as light
bound states of a fundamental dynamics giving rise to a composite Higgs boson
and partial compositeness for the top. As a concrete example, we discuss an
explicit UV completion based on the SU(4)/Sp(4) coset, where QCD colour is
carried by additional fundamental fermions charged under the confining gauge
group. Top partners, as well as potentially even lighter coloured scalars,
arise as bound states of the coloured fermions. We study production and
detection at LHC Run I and II of the octet and sextet, setting lower limits on
masses and couplings to Standard Model particles using existing 8 TeV analyses.
We finally explore prospects for the ongoing 13 TeV Run II: we focus on final
states with two same sign leptons, that have the potential to discriminate the
sextet.Comment: 39 pages, 9 figures, 4 tables. Agrees with version published in JHEP.
  Changes w.r.t. v1: Fig. 1 added for illustration, U(1) charge in Tab. 1
  corrected, references adde
Improved anatomy of epsilon'/epsilon in the Standard Model

We present a new analysis of the ratio epsilon'/epsilon within the Standard
Model (SM) using a formalism that is manifestly independent of the values of
leading (V-A)x(V-A) QCD penguin, and EW penguin hadronic matrix elements of the
operators Q_4, Q_9, and Q_10, and applies to the SM as well as extensions with
the same operator structure. It is valid under the assumption that the SM
exactly describes the data on CP-conserving K -> pi pi amplitudes. As a result
of this and the high precision now available for CKM and quark mass parameters,
to high accuracy epsilon'/epsilon depends only on two non-perturbative
parameters, B_6^(1/2) and B_8^(3/2), and perturbatively calculable Wilson
coefficients. Within the SM, we are separately able to determine the hadronic
matrix element <Q_4>_0 from CP-conserving data, significantly more precisely
than presently possible with lattice QCD. Employing B_6^(1/2) = 0.57+-0.19 and
B_8^(3/2) = 0.76+-0.05, extracted from recent results by the RBC-UKQCD
collaboration, we obtain epsilon'/epsilon = (1.9+-4.5) 10^-4, substantially
more precise than the recent RBC-UKQCD prediction and 2.9 sigma below the
experimental value (16.6+-2.3) 10^-4, with the error being fully dominated by
that on B_6^(1/2). Even discarding lattice input completely, but employing the
recently obtained bound B_6^(1/2) <= B_8^(3/2) <= 1 from the large-N approach,
the SM value is found more than 2 sigma below the experimental value. At
B_6^(1/2) = B_8^(3/2) = 1, varying all other parameters within one sigma, we
find epsilon'/epsilon = (8.6+-3.2) 10^-4. We present a detailed anatomy of the
various SM uncertainties, including all sub-leading hadronic matrix elements,
briefly commenting on the possibility of underestimated SM contributions as
well as on the impact of our results on new physics models.Comment: 32 pages, 2 figures, systematic uncertainty for lattice B_6^(1/2)
  included, treatment of isospin breaking improved; some remarks added, version
  to appear in JHE
Non-Abelian T-duality for nonrelativistic holographic duals

We find new type II backgrounds with non-relativistic symmetries via
non-Abelian T-duality. First we consider geometries with Galilean symmetries in
type IIA, which have been identified as non-relativistic generalizations of the
ABJM background and massive IIA supergravities. We then consider the
non-Abelian T-duality transformation on the backgrounds with Lifshitz symmetry
constructed by Donos and Gauntlett. Using gauge/gravity duality we study
aspects of the field theory dual to these backgrounds.Comment: 43 pages, 4 figures; typos and one eq. corrected, references adde
Stability of the effective potential of the gauge-less top-Higgs model
  in curved spacetime

We investigate stability of the Higgs effective potential in curved
spacetime. To this end, we consider the gauge-less top-Higgs sector with an
additional scalar field. Explicit form of the terms proportional to the squares
of the Ricci scalar, the Ricci tensor and the Riemann tensor that arise at the
one-loop level in the effective action has been determined. We have
investigated the influence of these terms on the stability of the scalar
effective potential. The result depends on background geometry. In general, the
potential becomes modified both in the region of the electroweak minimum and in
the region of large field strength.Comment: 32 pages, 13 figures; version accepted for publication in JHE
Neutrinoless Double Beta Decay in Type I+II Seesaw Models

We study neutrinoless double beta decay in left-right symmetric extension of
the standard model with type I and type II seesaw origin of neutrino masses.
Due to the enhanced gauge symmetry as well as extended scalar sector, there are
several new physics sources of neutrinoless double beta decay in this model.
Ignoring the left-right gauge boson mixing and heavy-light neutrino mixing, we
first compute the contributions to neutrinoless double beta decay for type I
and type II dominant seesaw separately and compare with the standard light
neutrino contributions. We then repeat the exercise by considering the presence
of both type I and type II seesaw, having non-negligible contributions to light
neutrino masses and show the difference in results from individual seesaw
cases. Assuming the new gauge bosons and scalars to be around a TeV, we
constrain different parameters of the model including both heavy and light
neutrino masses from the requirement of keeping the new physics contribution to
neutrinoless double beta decay amplitude below the upper limit set by the GERDA
experiment and also satisfying bounds from lepton flavor violation, cosmology
and colliders.Comment: v2: 30 pages, 14 figures, Accepted for publication in JHE
NLO QCD corrections to off-shell top-antitop production with leptonic
  decays in association with a Higgs boson at the LHC

We compute the hadronic production of top-antitop pairs in association with a
Higgs boson at next-to-leading-order QCD, including the decay of the top and
antitop quark into bottom quarks and leptons. Our computation is based on full
leading and next-to-leading-order matrix elements for $e^+ \nu_e
\mu^-\bar{\nu}_\mu b \bar{b} H(j)$ and includes all non-resonant contributions,
off-shell effects and interferences. Numerical results for the integrated cross
section and several differential distributions are given for the LHC operating
at 13 TeV using a fixed and a dynamical factorization and renormalization
scale. The use of the dynamical instead of the fixed scale improves the
perturbative stability in high-energy tails of most distributions, while the
integrated cross section is hardly affected differing by only about one per
cent and leading to the same K factor of 1.17.Comment: 18 pages, 1 table, 30 figures, version to appear in JHEP, numerical
  analysis somewhat extende
The exact Schur index of $\mathcal{N}=4$ SYM

The Witten index counts the difference in the number of bosonic and fermionic
states of a quantum mechanical system. The Schur index, which can be defined
for theories with at least $\mathcal{N}=2$ supersymmetry in four dimensions is
a particular refinement of the index, dependent on one parameter $q$ serving as
the fugacity for a particular set of charges which commute with the hamiltonian
and some supersymmetry generators. This index has a known expression for all
Lagrangian and some non-Lagrangian theories as a finite dimensional integral or
a complicated infinite sum. In the case of $\mathcal{N}=4$ SYM with gauge group
$U(N)$ we rewrite this as the partition function of a gas of $N$ non
interacting and translationally invariant fermions on a circle. This allows us
to perform the integrals and write down explicit expressions for fixed $N$ as
well as the exact all orders large $N$ expansion.Comment: 11 pages; v2: typos correcte
Search for lepton-flavour-violating $H\to\mu\tau$ decays of the Higgs
  boson with the ATLAS detector

A direct search for lepton-flavour-violating (LFV) $H\to\mu\tau$ decays of
the recently discovered Higgs boson with the ATLAS detector at the LHC is
presented. The analysis is performed in the $H\to\mu\tau_{\mathrm{had}}$
channel, where $\tau_{\mathrm{had}}$ is a hadronically decaying $\tau$-lepton.
The search is based on the data sample of proton--proton collisions collected
by the ATLAS experiment corresponding to an integrated luminosity of 20.3
fb$^{-1}$ at a centre-of-mass energy of $\sqrt{s}=8$ TeV. No statistically
significant excess of data over the predicted background is observed. The
observed (expected) 95% confidence-level upper limit on the branching fraction,
Br($H\to\mu\tau$), is 1.85% (1.24%).Comment: Comments: 15 pages plus author list + cover pages (31 pages total), 3
  figures, 3 tables, submitted to JHEP. All figures including auxiliary figures
  are available at
  https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HIGG-2014-08
Holographic Flows in non-Abelian T-dual Geometries

We use non-Abelian T-duality to construct new N=1 solutions of type IIA
supergravity (and their M-theory lifts) that interpolate between AdS_5
geometries. We initiate a study of the holographic interpretation of these
backgrounds as RG flows between conformal fixed points. Along the way we give
an elegant formulation of non-Abelian T-duality when acting on a wide class of
backgrounds, including those corresponding to such flows, in terms of their
SU(2) structure.Comment: 28 pages plus appendixes. Version to appear in JHE
Supersymmetric Wilson loops in N=4 super Chern-Simons-matter theory

We investigate the supersymmetric Wilson loops in $d=3$ $\mathcal{N}=4$ super
Chern-Simons-matter theory obtained from non-chiral orbifold of ABJM theory. We
work in both Minkowski spacetime and Euclidean space, and we construct 1/4 and
1/2 BPS Wilson loops. We also provide a complete proof that the difference
between 1/4 and 1/2 Wilson loops is $Q$-exact with $Q$ being some supercharge
that is preserved by both the 1/4 and 1/2 Wilson loops. This plays an important
role in applying the localization techniques to compute the vacuum expectation
values of Wilson loops. We also study the M-theory dual of the 1/2 BPS circular
Wilson loop.Comment: V1, 35 pages; V2, 36 pages, references added; V3, 36 pages, typos
  corrected, more or less published versio
Leading hadronic contributions to the running of the electroweak
  coupling constants from lattice QCD

The quark-connected leading-order hadronic contributions to the running of
the electromagnetic fine structure constant, $\alpha_{\rm QED}$, and the weak
mixing angle, $\theta_W$, are determined by a four-flavour lattice QCD
computation with twisted mass fermions. Full agreement of the results with a
phenomenological analysis is observed with an even comparable statistical
uncertainty. We show that the uncertainty of the lattice calculation is
dominated by systematic effects which then leads to significantly larger errors
than obtained by the phenomenological analysis.Comment: 15 pages, 13 figures, 6 tables; matches the published versio
Holographic Trace Anomaly and Local Renormalization Group

The Hamilton-Jacobi method in holography has produced important results both
at a renormalization group (RG) fixed point and away from it. In this paper we
use the Hamilton-Jacobi method to compute the holographic trace anomaly for
four- and six-dimensional boundary conformal field theories (CFTs), assuming
higher-derivative gravity and interactions of scalar fields in the bulk. The
scalar field contributions to the anomaly appear in CFTs with exactly marginal
operators. Moving away from the fixed point, we show that the Hamilton-Jacobi
formalism provides a deep connection between the holographic and the local RG.
We derive the local RG equation holographically, and verify explicitly that it
satisfies Weyl consistency conditions stemming from the commutativity of Weyl
scalings. We also consider massive scalar fields in the bulk corresponding to
boundary relevant operators, and comment on their effects to the local RG
equation.Comment: 27 pages. v3: References adde
The CHY representation of tree-level primitive QCD amplitudes

In this paper we construct a CHY representation for all tree-level primitive
QCD amplitudes. The quarks may be massless or massive. We define a generalised
cyclic factor $\hat{C}(w,z)$ and a generalised permutation invariant function
$\hat{E}(z,p,\varepsilon)$. The amplitude is then given as a contour integral
encircling the solutions of the scattering equations with the product $\hat{C}
\hat{E}$ as integrand. Equivalently, it is given as a sum over the inequivalent
solutions of the scattering equations, where the summand consists of a Jacobian
times the product $\hat{C} \hat{E}$. This representation separates information:
The generalised cyclic factor does not depend on the helicities of the external
particles, the generalised permutation invariant function does not depend on
the ordering of the external particles.Comment: 32 pages, version to be publishe
Neutral Kaon Mixing Beyond the Standard Model with $n_f=2+1$ Chiral
  Fermions Part 1: Bare Matrix Elements and Physical Results

We compute the hadronic matrix elements of the four-quark operators relevant
for $K^0-{\bar K^0}$ mixing beyond the Standard Model. Our results are from
lattice QCD simulations with $n_f=2+1$ flavours of domain-wall fermion, which
exhibit continuum-like chiral-flavour symmetry. The simulations are performed
at two different values of the lattice spacing ($a\sim0.08$ and $a\sim 0.11 \,
\fm $) and with lightest unitary pion mass $\sim 300\, \MeV$. For the first
time, the full set of relevant four-quark operators is renormalised
non-perturbatively through RI-SMOM schemes; a detailed description of the
renormalisation procedure is presented in a companion paper. We argue that the
intermediate renormalisation scheme is responsible for the discrepancies found
by different collaborations. We also study different normalisations and
determine the matrix elements of the relevant four-quark operators with a
precision of $\sim 5\%$ or better.Comment: 38 page
Naturalness and lepton number/flavor violation in inverse seesaw models

We introduce three right-handed neutrinos and three sterile neutrinos, and
consider an inverse seesaw mechanism for neutrino mass generation. From
naturalness point of view, their Majorana masses should be small, while it
induces a large neutrino Yukawa coupling. Then, a neutrinoless double beta
decay rate can be enhanced, and a sizable Higgs mass correction is inevitable.
We find that the enhancement rate can be more than ten times compared with a
standard prediction from light neutrino contribution alone, and an analytic
form of heavy neutrino contributions to the Higgs mass correction. In addition,
we numerically analyze the model, and find almost all parameter space of the
model can be complementarily searched by future experiments of neutrinoless
double beta decay and $\mu \to e$ conversion.Comment: 19 pages, 6 figures: version accepted for publication in JHE
Tools for CICYs in F-theory

We provide a set of tools for analyzing the geometry of elliptically fibered
Calabi-Yau manifolds, starting with a description of the total space rather
than with a Weierstrass model or a specified type of fiber/base. Such an
approach to the subject of F-theory compactification makes certain geometric
properties, which are usually hidden, manifest. Specifically, we review how to
isolate genus-one fibrations in such geometries and then describe how to find
their sections explicitly. This includes a full parameterization of the
Mordell-Weil group where non-trivial. We then describe how to analyze the
associated Weierstrass models, Jacobians and resolved geometries. We illustrate
our discussion with concrete examples which are complete intersections in
products of projective spaces (CICYs). The examples presented include cases
exhibiting non-abelian symmetries and higher rank Mordell-Weil group. We also
make some comments on non-flat fibrations in this context. In a companion paper
[1] to this one, these results will be used to analyze the consequences for
string dualities of the ubiquity of multiple fibrations in known constructions
of Calabi-Yau manifolds.Comment: 49 pages, 3 figure
Green-Schwarz superstring on doubled-yet-gauged spacetime

We construct a world-sheet action for Green-Schwarz superstring in terms of
doubled-yet-gauged spacetime coordinates. For an arbitrarily curved NS-NS
background, the action possesses $\mathbf{O}(10,10)$ T-duality,
$\mathbf{Spin}(1,9)\times\mathbf{Spin}(9,1)$ Lorentz symmetry, coordinate gauge
symmetry, spacetime doubled-yet-gauged diffeomorphisms, world-sheet
diffeomorphisms and Weyl symmetry. Further, restricted to flat backgrounds, it
enjoys maximal spacetime supersymmetry and kappa-symmetry. After the auxiliary
coordinate gauge symmetry potential being integrated out, our action can
consistently reduce to the original undoubled Green-Schwarz action. Thanks to
the twofold spin groups, the action is unique: it is specific choices of the
NS-NS backgrounds that distinguish IIA or IIB, as well as lead to
non-Riemannian or non-relativistic superstring a la Gomis-Ooguri which might
deserve the nomenclature, type IIC.Comment: 1+27 pages. No figure. v2) Wess-Zumino term identified, More Refs. To
  be published in JHE
Extremal chiral $\mathcal N=4$ SCFT with $c=24$

We construct an extremal chiral $\mathcal N=4$ superconformal field theory
with central charge 24 from a $\mathbb Z_2$ orbifold of the chiral bosonic
theory with target $\mathbb R^{24}/\Lambda$, where $\Lambda$ is the Niemeier
lattice with root system $A_2^{12}$. This construction is analogous to
constructions of extremal chiral $\mathcal N=1$ and $\mathcal N=2$ CFTs with
$c=24$, where $\Lambda = \Lambda_{Leech}$ and the Niemeier lattice with root
system $A_1^{24}$, respectively. The theory has a discrete symmetry group
related to the sporadic group $M_{11}$.Comment: 18 pages + 12 pages of appendice
Holographic Shear Viscosity in Hyperscaling Violating Theories without
  Translational Invariance

In this paper we investigate the ratio of shear viscosity to entropy density,
$\eta/s$, in hyperscaling violating geometry with lattice structure. We show
that the scaling relation with hyperscaling violation gives a strong constraint
to the mass of graviton and usually leads to a power law of temperature,
$\eta/s\sim T^\kappa$. We find the exponent $\kappa$ can be greater than two
such that the new bound for viscosity raised in arXiv:1601.02757 is violated.
Our above observation is testified by constructing specific solutions with UV
completion in various holographic models. Finally, we compare the boundedness
of $\kappa$ with the behavior of entanglement entropy and conjecture a relation
between them.Comment: 38 pages, 8 figures: 1 appendix added, 2 figures added, 1 references
  adde
Holographic duality from random tensor networks

Tensor networks provide a natural framework for exploring holographic duality
because they obey entanglement area laws. They have been used to construct
explicit toy models realizing many interesting structural features of the
AdS/CFT correspondence, including the non-uniqueness of bulk operator
reconstruction in the boundary theory. In this article, we explore the
holographic properties of networks of random tensors. We find that our models
naturally incorporate many features that are analogous to those of the AdS/CFT
correspondence. When the bond dimension of the tensors is large, we show that
the entanglement entropy of boundary regions, whether connected or not, obey
the Ryu-Takayanagi entropy formula, a fact closely related to known properties
of the multipartite entanglement of assistance. Moreover, we find that each
boundary region faithfully encodes the physics of the entire bulk entanglement
wedge. Our method is to interpret the average over random tensors as the
partition function of a classical ferromagnetic Ising model, so that the
minimal surfaces of Ryu-Takayanagi appear as domain walls. Upon including the
analog of a bulk field, we find that our model reproduces the expected
corrections to the Ryu-Takayanagi formula: the minimal surface is displaced and
the entropy is augmented by the entanglement of the bulk field. Increasing the
entanglement of the bulk field ultimately changes the minimal surface
topologically in a way similar to creation of a black hole. Extrapolating bulk
correlation functions to the boundary permits the calculation of the scaling
dimensions of boundary operators, which exhibit a large gap between a small
number of low-dimension operators and the rest. While we are primarily
motivated by AdS/CFT duality, our main results define a more general form of
bulk-boundary correspondence which could be useful for extending holography to
other spacetimes.Comment: 57 pages, 13 figure
Primordial Lepton Oscillations and Baryogenesis

The baryon asymmetry of the Universe should have been produced after the
inflation era. We consider the possibility that the asymmetry is generated by
the flavor oscillations in the reheating process after inflation, so that the
baryon asymmetry is realized already at the beginning of the radiation
dominated era. In the seesaw model, we show that the propagators of the
left-handed leptons generically have flavor mixings in the thermal background,
that can generate flavor-dependent lepton asymmetry through the $CP$ violation
in the oscillation phenomena. The flavor dependent rates for the wash-out
process can leave the net asymmetry today.Comment: 10 pages; published version(v2