pinecone/core-2020-05-10-deduplication huggingface dataset:
Anomaly Mediation from Unbroken Supergravity

When supergravity (SUGRA) is spontaneously broken, it is well known that
anomaly mediation generates sparticle soft masses proportional to the gravitino
mass. Recently, we showed that one-loop anomaly-mediated gaugino masses should
be associated with unbroken supersymmetry (SUSY). This counterintuitive result
arises because the underlying symmetry structure of (broken) SUGRA in flat
space is in fact (unbroken) SUSY in anti-de Sitter (AdS) space. When quantum
corrections are regulated in a way that preserves SUGRA, the underlying AdS
curvature (proportional to the gravitino mass) necessarily appears in the
regulated action, yielding soft masses without corresponding goldstino
couplings. In this paper, we extend our analysis of anomaly mediation to
sfermion soft masses. Already at tree-level we encounter a number of surprises,
including the fact that zero soft masses correspond to broken (AdS) SUSY. At
one-loop, we explain how anomaly mediation appears when regulating SUGRA in a
way that preserves super-Weyl invariance. We find that recent claims in the
literature about the non-existence of anomaly mediation were based on a
Wilsonian effective action with residual gauge dependence, and the
gauge-invariant 1PI effective action contains the expected anomaly-mediated
spectrum. Finally, we calculate the sfermion spectrum to all orders, and use
supertrace relations to derive the familiar two-loop soft masses from minimal
anomaly mediation, as well as unfamiliar tree-level and one-loop goldstino
couplings consistent with renormalization group invariance.Comment: 45 pages, 4 figures, 1 tabl
(S)QCD on R^3 x S^1: Screening of Polyakov loop by fundamental quarks
  and the demise of semi-classics

Recently, it was argued that the thermal deconfinement transition in pure
Yang-Mills theory is continuously connected to a quantum phase transition in
softly-broken N=1 SYM theory on R^3 x S^1. The transition is semiclassically
calculable at small S^1 size L, occurs as the soft mass m_soft and L vary, and
is driven by a competition between perturbative effects and nonperturbative
topological molecules. These are correlated instanton--anti-instanton tunneling
events, whose constituents are monopole-instantons "bound" by attractive
long-range forces. The mechanism driving the transition is universal for all
simple gauge groups, with or without a center, such as SU(N) or G_2. Here, we
consider theories with fundamental quarks. We examine the role topological
objects play in determining the fate of the (exact or approximate)
center-symmetry in SU(2) SQCD, with or without soft-breaking terms. In theories
whose large-m_soft limit is thermal nonsupersymmetric QCD with massive quarks,
we find a crossover of the Polyakov loop, from approximately center-symmetric
at small 1/L to maximally center-broken at larger 1/L, as seen in lattice
thermal QCD with massive quarks and T=1/L. We argue that in all calculable
cases, including SQCD with exact center symmetry, quarks deform
instanton-monopoles by their quantum fluctuations and do not contribute to
their binding. The semiclassical approximation and the molecular picture of the
vacuum fail, upon decreasing the quark mass, precisely when quarks would begin
mediating a long-range attractive force between monopole-instantons, calling
for a dual description of the resulting strong-coupling theory.Comment: 40 pages, 2 figure
Heavy-quark mass effects in Higgs boson production at the LHC

We study the impact of heavy-quark masses in Higgs boson production through
gluon fusion at the LHC. We extend previous computations of the fully
differential cross section and of the transverse momentum spectrum of the Higgs
boson by taking into account the finite top- and bottom-quark masses up to
O(alpha_S^3). We also discuss the issues arising when the heavy-quark mass is
much smaller than the Higgs mass. Our results are implemented in updated
versions of the HNNLO and HRes numerical programs.Comment: Minor modifications, results unchanged. Discussion on uncertainties
  added. Version published on JHE
Hyperbolic deformation of the strip-equation and the accessory
  parameters for the torus

By applying an hyperbolic deformation to the uniformization problem for the
infinite strip, we give a method for computing the accessory parameter for the
torus with one source as an expansion in the modular parameter q. At O(q^0) we
obtain the same equation for the accessory parameter and the same value of the
semiclassical action as the one obtained from the b -> 0 limit of the quantum
one point function. The procedure can be carried over to the full O(q^2) or
even higher order corrections although the procedure becomes somewhat
complicated. Here we compute to order q^2 the correction to the weight
parameter intervening in the conformal factor and it is shown that the unwanted
contribution O(q) to the accessory parameter equation cancel exactly.Comment: 20 pages LaTeX, corrected typo
Scattering Amplitudes and Toric Geometry

In this paper we provide a first attempt towards a toric geometric
interpretation of scattering amplitudes. In recent investigations it has indeed
been proposed that the all-loop integrand of planar N=4 SYM can be represented
in terms of well defined finite objects called on-shell diagrams drawn on
disks. Furthermore it has been shown that the physical information of on-shell
diagrams is encoded in the geometry of auxiliary algebraic varieties called the
totally non negative Grassmannians. In this new formulation the infinite
dimensional symmetry of the theory is manifest and many results, that are quite
tricky to obtain in terms of the standard Lagrangian formulation of the theory,
are instead manifest. In this paper, elaborating on previous results, we
provide another picture of the scattering amplitudes in terms of toric
geometry. In particular we describe in detail the toric varieties associated to
an on-shell diagram, how the singularities of the amplitudes are encoded in
some subspaces of the toric variety, and how this picture maps onto the
Grassmannian description. Eventually we discuss the action of cluster
transformations on the toric varieties. The hope is to provide an alternative
description of the scattering amplitudes that could contribute in the
developing of this very interesting field of research.Comment: 58 pages, 25 figures, typos corrected, a reference added, to be
  published in JHE
Asymptotic symmetry groups and operator algebras

We associate vertex operators to space-time diffeomorphisms in flat space
string theory, and compute their algebra, which is a diffeomorphism algebra
with higher derivative corrections. As an application, we realize the
asymptotic symmetry group BMS3 of three-dimensional flat space in terms of
vertex operators on the string worldsheet. This provides an embedding of the
BMS3 algebra in a consistent theory of quantum gravity. Higher derivative
corrections vanish asymptotically. An appendix is dedicated to alpha prime
corrected algebras in conformal field theory and string theory.Comment: 25 page
Unsafe but Calculable: Ratios of Angularities in Perturbative QCD

Infrared- and collinear-safe (IRC-safe) observables have finite cross
sections to each fixed-order in perturbative QCD. Generically, ratios of
IRC-safe observables are themselves not IRC safe and do not have a valid
fixed-order expansion. Nevertheless, in this paper we present an explicit
method to calculate the cross section for a ratio observable in perturbative
QCD with the help of resummation. We take the IRC-safe jet angularities as an
example and consider the ratio formed from two angularities with different
angular exponents. While the ratio observable is not IRC safe, it is "Sudakov
safe", meaning that the perturbative Sudakov factor exponentially suppresses
the singular region of phase space. At leading logarithmic (LL) order, the
distribution is finite but has a peculiar expansion in the square root of the
strong coupling constant, a consequence of IRC unsafety. The accuracy of the LL
distribution can be further improved with higher-order resummation and
fixed-order matching. Non-perturbative effects can sometimes give rise to order
one changes in the distribution, but at sufficiently high energies Q, Sudakov
safety leads to non-perturbative corrections that scale like a (fractional)
power of 1/Q, as is familiar for IRC-safe observables. We demonstrate that
Monte Carlo parton showers give reliable predictions for the ratio observable,
and we discuss the prospects for computing other ratio observables using our
method.Comment: 41 pages, 14 figures, 1 table, small changes in v.
Measurements of branching fractions of leptonic and hadronic Ds+ meson
  decays and extraction of the Ds+ meson decay constant

We present measurements of absolute branching fractions of hadronic and
leptonic Ds+ decays to K- K+ pi+, anti-K0 K+, eta pi+, mu+ nu_mu and tau+
nu_tau and report a search for the leptonic Ds+ to e+ nu_e decays. The results
are obtained from a data sample of 913 fb^-1 collected at or near the Y(4S) and
Y(5S) resonances with the Belle detector at the KEKB asymmetric-energy e+e-
collider. The branching fractions of hadronic decays are measured to be Br(Ds+
-> K- K+ pi+) = (5.06 +- 0.15 +- 0.21)%, Br(Ds+ -> anti-K0 K+) = (2.95 +- 0.11
+- 0.09)%, and Br(Ds+ -> eta pi+) = (1.82 +- 0.14 +- 0.07)%, where the first
and second uncertainties are statistical and systematic, respectively. The
branching fractions of leptonic decays are measured to be Br(Ds+ -> mu+ nu_mu)
= (0.531 +- 0.028 +- 0.020)%, and Br(Ds+ -> tau+ nu_tau) = (5.70 +- 0.21
+0.31-0.30)%, which are combined to determine the Ds+ meson decay constant f_Ds
= (255.5 +- 4.2 +- 5.1) MeV. We find no significant signal for Ds+ -> e+ nu_e
decays and set an upper limit of Br(Ds+ -> e+ nu_e) < 1.0 (0.83) x 10^-4 at 95%
(90%) confidence level.Comment: 31 pages, 9 figure
New Methods for Characterizing Phases of 2D Supersymmetric Gauge
  Theories

We study the physics of two-dimensional N=(2,2) gauged linear sigma models
(GLSMs) via the two-sphere partition function. We show that the classical phase
boundaries separating distinct GLSM phases, which are described by the
secondary fan construction for abelian GLSMs, are completely encoded in the
analytic structure of the partition function. The partition function of a
non-abelian GLSM can be obtained as a limit from an abelian theory; we utilize
this fact to show that the phases of non-abelian GLSMs can be obtained from the
secondary fan of the associated abelian GLSM. We prove that the partition
function of any abelian GLSM satisfies a set of linear differential equations;
these reduce to the familiar A-hypergeometric system of Gel'fand, Kapranov, and
Zelevinski for GLSMs describing complete intersections in toric varieties. We
develop a set of conditions that are necessary for a GLSM phase to admit an
interpretation as the low-energy limit of a non-linear sigma model with a
Calabi-Yau threefold target space. Through the application of these criteria we
discover a class of GLSMs with novel geometric phases corresponding to
Calabi-Yau manifolds that are branched double-covers of Fano threefolds. These
criteria provide a promising approach for constructing new Calabi-Yau
geometries.Comment: 25 pages + references, appendices. v2: references added, typos
  corrected. v3: two small typos correcte
W Symmetry and Integrability of Higher spin black holes

We obtain the asymptotic symmetry algebra of sl(3,R) x sl(3,R) Chern-Simons
theory with Dirichlet boundary conditions for fixed chemical potential. These
boundary conditions are obeyed by higher spin black holes. For each embedding
of sl(2,R) into sl(3,R), we show that the asymptotic symmetry group is
independent of the chemical potential. On the one hand, starting from AdS3 in
the principal embedding, we show that the W3 x W3 symmetry is preserved upon
turning on perturbatively spin 3 chemical potentials. On the other hand,
starting from AdS3 in the diagonal embedding, we show that the W3^(2) x W3^(2)
symmetry is preserved upon turning on finite spin 3/2 chemical potentials. We
also make connections between the canonical Lagrangian formalism and
integrability methods based on the third KdV (Boussinesq) hierarchy.Comment: 40 pages, typos corrected, refs added, published versio
Precision Higgs Measurements: Constraints from New Oblique Corrections

New particles entering into self-energies of the Higgs boson would
necessarily modify loop-induced couplings of the Higgs, if the new particle
carries standard model gauge quantum numbers. For a 1 TeV new particle,
deviations in these "Higgs oblique corrections" are generically of the order of
v^2/(1 TeV)^2 ~ 5%. We study constraints on masses and couplings of new scalars
and fermions that can be derived from 5-10% deviations in the Higgs digluon and
diphoton partial widths. To reduce theoretical uncertainties, we present
next-to-leading order QCD corrections to the Higgs-to-digluon coupling for
scalars and fermions in arbitrary representations of SU(3) color group, by
applying the low-energy Higgs theorems at two-loop order. As a by-product we
provide a new value for NLO QCD corrections to the top squark contributions to
digluon decays that differs from existing literature. We also emphasize that
precise measurements of Higgs couplings to W boson and top quark are
prerequisite to precise determinations of Higgs oblique corrections from new
particles.Comment: 27 pages, 6 figures, References added, Fig.4 slightly corrected,
  conclusions unchanged. Published in JHE
New Global F-theory GUTs with U(1) symmetries

We construct global F-theory GUTs with SU(5) x U(1) gauge group defined by
specifying a fully resolved Calabi-Yau fourfold and consistent four-form
G-flux. Its specific U(1) charged matter spectrum allows the desired Yukawa
couplings, but forbids dangerous proton decay operators. The model we find: (1)
does not follow from an underlying higgsed E8 gauge group (2) leaves the class
of theories that can be analyzed with current split-spectral cover techniques.
This avoids recently proposed no-go theorems for models with hypercharge flux,
as required to break the GUT group. The appearance of additional fields is
related geometrically to considering a more general class of sections and 4-1
splits. We show explicitly that the four-dimensional chiral matter index can
still be computed using three-dimensional one-loop Chern-Simons terms.Comment: 24 pages, 2 figure
Perturbative evaluation of circular 1/2 BPS Wilson loops in N = 6 Super
  Chern-Simons theories

We present a complete two-loop analysis of the quantum expectation value for
circular BPS Wilson loops in ABJ(M) theories. We examine in details the 1/2 BPS
case, that requires non-trivial fermionic couplings with the contour, finding
perfect agreement with the exact matrix model answer at zero framing. The
result is obtained through a careful application of DRED regularization scheme,
combined with a judicious rearrangement of the relevant perturbative
contributions that reduces the computation to simple integrals. We carefully
analyze the contribution of fermions that is crucial for the consistency with
the localization procedure and point out the arising of pivotal evanescent
terms, discussing their meaning in relation to Ward identities.Comment: 32 pages, 5 figures, Referemces adde
Moduli destabilization via gravitational collapse

We examine the interplay between gravitational collapse and moduli stability
in the context of black hole formation. We perform numerical simulations of the
collapse using the double null formalism and show that the very dense regions
one expects to find in the process of black hole formation are able to
destabilize the volume modulus. We establish that the effects of the
destabilization will be visible to an observer at infinity, opening up a window
to a region in spacetime where standard model's couplings and masses can differ
significantly from their background values.Comment: 21 pages, 9 figure
Resummed Higgs cross section at N$^3$LL

We present accurate predictions for the inclusive production of a Higgs boson
in proton-proton collisions, via gluon-gluon fusion. Our calculation includes
next-to-next-to-leading order (NNLO) corrections in perturbative QCD, as well
as the resummation of threshold-enhanced contributions to
next-to-next-to-next-to-leading logarithmic (N$^3$LL) accuracy, with the
inclusion of the recently-determined three-loop constant coefficient (sometimes
referred to as N$^3$LL' accuracy).
  Our result correctly accounts for finite top, bottom and charm masses at
leading order (LO) and next-to-leading order (NLO), and includes top mass
dependence at NNLO. At the resummed level the dependence on top, bottom and
charm mass is accounted for at NLL, while only the top mass at NNLL. The
all-order calculation is improved by a suitable choice of the soft terms,
dictated by analyticity conditions and by the inclusion of subleading
corrections of collinear origin, which improve the accuracy of the resummation
away from the threshold region.
  We present results for different collider energies and we study perturbative
uncertainties by varying renormalization and factorization scales. We find
that, at current LHC energies, the resummation corrects the NNLO result by as
much as 20 % at $\mu_R=\mu_F=m_H$, while the correction is much smaller, 5.5 %,
at $\mu_R=\mu_F=m_H /\,2$. While the central value of NNLO+N$^3$LL result
depends very mildly on the scale choice, we argue that a more reliable estimate
of the theoretical uncertainty is found if the perturbative scales are
canonically varied about $m_H$.Comment: 21 pages, 8 figures. Added a figure with quantitative comparisons
  between different resummations. Version to be published in JHE
Conformal Blocks and Negativity at Large Central Charge

We consider entanglement negativity for two disjoint intervals in 1+1
dimensional CFT in the limit of large central charge. As the two intervals get
close, the leading behavior of negativity is given by the logarithm of the
conformal block where a set of approximately null descendants appears in the
intermediate channel. We compute this quantity numerically and compare with
existing analytic methods which provide perturbative expansion in powers of the
cross-ratio.Comment: harvmac, 30 pages, 2 figures, references added, accepted for
  publication in JHE
Texture and Cofactor Zeros of the Neutrino Mass Matrix

We study Majorana neutrino mass matrices that have two texture zeros, or two
cofactor zeros, or one texture zero and one cofactor zero. The two
texture/cofactor zero conditions give four constraints, which in conjunction
with the five measured oscillation parameters completely determine the nine
independent real parameters of the neutrino mass matrix. We also study the
implications that future measurements of neutrinoless double beta decay and the
Dirac CP phase will have on these cases.Comment: 25 pages, 8 tables, 11 figures. Version to appear in JHE
Scale-dependent power spectrum from initial excited-de Sitter modes

In this paper, we calculate corrections of scalar perturbations spectra resulting from excited-de Sitter modes as the nontrivial initial states. To obtain these modes, we consider the asymptotic expansion of the Hankel functions up to the higher order of 1 kτ $$ \frac{1}{k\tau} $$ . Actually the Planck and WMAP data impose some constrains on the Hankel function index. These observational constraints and back-reaction effects stimulate us to use excited-de Sitter modes. Finally, we nominate these nontrivial general solutions as the fundamental mode functions during inflation and we calculate the corrected form of scale-dependent power spectrum with trans-Planckian corrections, and in de Sitter space-time limit the results reduce to the scale-invariant power spectrum
Two-dimensional Yang-Mills Theory on Recursive Infinite Genus Surfaces

The partition function of Euclidean Yang-Mills theory on two dimensional
surfaces is given by the Migdal formula. It involves the area and topological
characteristics of the surface. We consider this theory on a class of infinite
genus surfaces that are constructed recursively. We make use of this recursive
structure to compute the partition functions (with or without additional Wilson
loops) on such surfaces. Our method also works for the quantum deformed
Yang-Mills theory.Comment: 1+7 pages, 2 figure
Rigid supersymmetry, conformal coupling and twistor spinors

We investigate the relationship between conformal and spin structure on lorentzian manifolds and see how their compatibility influences the formulation of rigid supersymmetric field theories. In dimensions three, four, six and ten, we show that if the Dirac current associated with a generic spinor defines a null conformal Killing vector then the spinor must obey a twistor equation with respect to a certain connection with torsion. Of the theories we consider, those with classical superconformal symmetry in Minkowski space can be reformulated as rigid supersymmetric theories on any lorentzian manifold admitting twistor spinors. In dimensions six and ten, we also describe rigid supersymmetric gauge theories on bosonic minimally supersymmetric supergravity backgrounds
Classification of lepton mixing matrices from finite residual symmetries

Assuming that neutrinos are Majorana particles, we perform a complete classification of all possible mixing matrices which are fully determined by residual symmetries in the charged-lepton and neutrino mass matrices. The classification is based on the assumption that the residual symmetries originate from a finite flavour symmetry group. The mathematical tools which allow us to accomplish this classification are theorems on sums of roots of unity. We find 17 sporadic cases plus one infinite series of mixing matrices associated with three-flavour mixing, all of which have already been discussed in the literature. Only the infinite series contains mixing matrices which are compatible with the data at the 3 sigma level
Hadronic b ′ search at the LHC with top and W taggers

We study the sensitivity of a down type quark b ′ via process pp → b ′ b ¯ ′ $$ b^{\prime}\overline{b}^{\prime } $$ → t W − t ¯ W + $$ t{W}^{-\overline{t}W+} $$ using jet substructure methods at the LHC with the collision energy s $$ \sqrt{s} $$ = 14 TeV. We consider the case that the b ′ is heavy (say from 800 GeV to 1500 GeV) and concentrate on the feasibility of the full hadronic mode. Both top tagger (the HEP top tagger) and W tagger (the CMS W-tagging) are used to reconstruct all objects in the final states. In order to suppress huge SM background events and take into account various cases with different number of boosted objects, we propose a comprehensive reconstruction procedure so as to extract the most crucial observables of the signal events. When b ′ mass is 1 TeV, it is found that with a 200 fb −1 dataset, the LHC may be able to detect the b ′ with a significance up to 10 or better. With a 3000 f b −1 dataset, the LHC may be able to probe the b ′ with a mass around up to 2 TeV, only by using the hadronic mode
Combined analysis of the decays τ − → K S π − ν τ and τ − → K − ην τ

In a combined study of the decay spectra of τ − − K S π − ν τ and τ − − K − ην τ decays within a dispersive representation of the required form factors, we illustrate how the K * (1410) resonance parameters, defined through the pole position in the complex plane, can be extracted with improved precision as compared to previous studies. While we obtain a substantial improvement in the mass, the uncertainty in the width is only slightly reduced, with the findings M K *′ = 1304 ± 17 MeV and Γ K *′ = 171 ± 62 MeV. Further constraints on the width could result from updated analyses of the Kπ and/or Kη spectra using the full Belle-I data sample. Prospects for Belle-II are also discussed. As the K − π 0 vector form factor enters the description of the decay τ − − K − ην τ , we are in a position to investigate isospin violations in its parameters like the form factor slopes. In this respect also making available the spectrum of the transition τ − → K − π 0 ν τ would be extremely useful, as it would allow to study those isospin violations with much higher precision