pinecone/core-2020-05-10-deduplication huggingface dataset:
A Unified Model of Quarks and Leptons with a Universal Texture Zero

We show that a universal texture zero in the (1,1) position of all fermionic
mass matrices, including heavy right-handed Majorana neutrinos driving a type-I
see-saw mechanism, can lead to a viable spectrum of mass, mixing and CP
violation for both quarks and leptons, including (but not limited to) three
important postdictions: the Cabibbo angle, the charged lepton masses, and the
leptonic `reactor' angle. We model this texture zero with a non-Abelian
discrete family symmetry that can easily be embedded in a grand unified
framework, and discuss the details of the phenomenology after electroweak and
family symmetry breaking. We provide an explicit numerical fit to the available
data and obtain excellent agreement with the 18 observables in the charged
fermion and neutrino sectors with just 9 free parameters. We further show that
the vacua of our new scalar familon fields are readily aligned along desired
directions in family space, and also demonstrate discrete gauge anomaly freedom
at the relevant scale of our effective theory.Comment: 17 pages, 2 figures. Version accepted for publication in JHE
Solving differential equations for Feynman integrals by expansions near
  singular points

We describe a strategy to solve differential equations for Feynman integrals
by powers series expansions near singular points and to obtain high precision
results for the corresponding master integrals. We consider Feynman integrals
with two scales, i.e. nontrivially depending on one variable. The corresponding
algorithm is oriented at situations where canonical form of the differential
equations is impossible. We provide a computer implementation of our algorithm
in a simple example of four-loop generalized sun-set integrals with three equal
non-zero masses. Our code provides values of the master integrals at any given
point on the real axis with a required accuracy and a given order of expansion
in the regularization parameter $\epsilon$.Comment: References added, functionality of the presented code extende
Resolution Effects in the Hybrid Strong/Weak Coupling Model

Within the context of a hybrid strong/weak coupling model of jet quenching,
we study the consequences of the fact that the plasma produced in a heavy ion
collision cannot resolve the substructure of a collimated parton shower
propagating through it with arbitrarily fine spatial resolution. We introduce a
screening length parameter, $L_{\rm res}$, proportional to the inverse of the
local temperature in the plasma, estimating a range for the value of the
proportionality constant via comparing weakly coupled QCD calculations and
holographic calculations appropriate in strongly coupled plasma. We then modify
the hybrid model so that when a parton in a jet shower splits, its two
offspring are initially treated as unresolved, and are only treated as two
separate partons losing energy independently after they are separated by a
distance $L_{\rm res}$. This modification delays the quenching of partons with
intermediate energy, resulting in the survival of more hadrons in the final
state with $p_T$ in the several GeV range. We analyze the consequences of
different choices for the value of the resolution length, $L_{\rm res}$, and
demonstrate that introducing a nonzero $L_{\rm res}$ results in modifications
to the jet shapes and jet fragmentations functions, as it makes it more
probable for particles carrying a small fraction of the jet energy at larger
angles from the jet axis to survive their passage through the quark-gluon
plasma. These effects are, however, small in magnitude, something that we
confirm via checking for effects on missing-$p_T$ observables.Comment: 32 pages, 7 figure
UV complete me: Positivity Bounds for Particles with Spin

For a low energy effective theory to admit a standard local, unitary,
analytic and Lorentz-invariant UV completion, its scattering amplitudes must
satisfy certain inequalities. While these bounds are known in the forward limit
for real polarizations, any extension beyond this for particles with nonzero
spin is subtle due to their non-trivial crossing relations. Using the
transversity formalism (i.e. spin projections orthogonal to the scattering
plane), in which the crossing relations become diagonal, these inequalities can
be derived for 2-to-2 scattering between any pair of massive particles, for a
complete set of polarizations at and away from the forward scattering limit.
This provides a set of powerful criteria which can be used to restrict the
parameter space of any effective field theory, often considerably more so than
its forward limit subset alone.Comment: 29 pages + 6 appendices, 3 figure
Some Exact Solutions for Maximally Symmetric Topological Defects in Anti
  de Sitter Space

We obtain exact analytical solutions for a class of SO($l$) Higgs field
theories in a non-dynamic background $n$-dimensional anti de Sitter space.
These finite transverse energy solutions are maximally symmetric
$p$-dimensional topological defects where $n=(p+1)+l$. The radius of curvature
of anti de Sitter space provides an extra length scale that allows us to study
the equations of motion in a limit where the masses of the Higgs field and the
massive vector bosons are both vanishing. We call this the double BPS limit. In
anti de Sitter space, the equations of motion depend on both $p$ and $l$. The
exact analytical solutions are expressed in terms of standard special
functions. The known exact analytical solutions are for kink-like defects
($p=0,1,2,\dotsc;\, l=1$), vortex-like defects ($p=1,2,3;\, l=2$), and the
'tHooft-Polyakov monopole ($p=0;\, l=3$). A bonus is that the double BPS limit
automatically gives a maximally symmetric classical glueball type solution. In
certain cases where we did not find an analytic solution, we present numerical
solutions to the equations of motion. The asymptotically exponentially
increasing volume with distance of anti de Sitter space imposes different
constraints than those found in the study of defects in Minkowski space.Comment: 45 pages, 19 figures. In version 2: added two paragraphs about how
  our double BPS limit automatically gives a solution to the Yang-Mills
  equation, and related it to Yang-Mills solutions in AdS_4 that appeared on
  the same day in eprint 1708.0636
Unattainable extended spacetime regions in conformal gravity

The Janis-Newman-Winicour metric is a solution of Einstein's gravity
minimally coupled to a real massless scalar field. The $\gamma$-metric is
instead a vacuum solution of Einstein's gravity. These spacetimes have no
horizon and possess a naked singularity at a finite value of the radial
coordinate, where curvature invariants diverge and the spacetimes are
geodetically incomplete. In this paper, we reconsider these solutions in the
framework of conformal gravity and we show that it is possible to solve the
spacetime singularities with a suitable choice of the conformal factor. Now
curvature invariants remain finite over the whole spacetime. Massive particles
never reach the previous singular surface and massless particles can never do
it with a finite value of their affine parameter. Our results support the
conjecture according to which conformal gravity can fix the singularity problem
that plagues Einstein's gravity.Comment: 1+10 pages, 2 figures. v2: refereed versio
Complex Langevin Simulation of a Random Matrix Model at Nonzero Chemical
  Potential

In this paper we test the complex Langevin algorithm for numerical
simulations of a random matrix model of QCD with a first order phase transition
to a phase of finite baryon density. We observe that a naive implementation of
the algorithm leads to phase quenched results, which were also derived
analytically in this article. We test several fixes for the convergence issues
of the algorithm, in particular the method of gauge cooling, the shifted
representation, the deformation technique and reweighted complex Langevin, but
only the latter method reproduces the correct analytical results in the region
where the quark mass is inside the domain of the eigenvalues. In order to shed
more light on the issues of the methods we also apply them to a similar random
matrix model with a milder sign problem and no phase transition, and in that
case gauge cooling cooling solves the convergence problems as was shown before
in the literature.Comment: 33 pages, 22 figure
Low-Energy Effective Field Theory below the Electroweak Scale: Operators
  and Matching

The gauge-invariant operators up to dimension six in the low-energy effective
field theory below the electroweak scale are classified. There are 70 Hermitian
dimension-five and 3631 Hermitian dimension-six operators that conserve baryon
and lepton number, as well as $\Delta B= \pm \Delta L = \pm 1$, $\Delta L=\pm
2$, and $\Delta L=\pm 4$ operators. The matching onto these operators from the
Standard Model Effective Field Theory (SMEFT) up to order $1/\Lambda^2$ is
computed at tree level. SMEFT imposes constraints on the coefficients of the
low-energy effective theory, which can be checked experimentally to determine
whether the electroweak gauge symmetry is broken by a single fundamental scalar
doublet as in SMEFT. Our results, when combined with the one-loop anomalous
dimensions of the low-energy theory and the one-loop anomalous dimensions of
SMEFT, allow one to compute the low-energy implications of new physics to
leading-log accuracy, and combine them consistently with high-energy LHC
constraints.Comment: 44 pages, 22 tables; version published in JHE
Asymptotic symmetries and geometry on the boundary in the first order
  formalism

Proper understanding of the geometry on the boundary of a spacetime is a
critical step on the way to extending holography to spaces with non-AdS
asymptotics. In general the boundary cannot be described in terms of the
Riemannian geometry and the first order formalism is more appropriate as we
show. We analyze the asymptotic symmetries in the first order formalism for
large classes of theories on AdS, Lifshitz or flat space. In all cases the
asymptotic symmetry algebra is realized on the first order variables as a
gauged symmetry algebra. First order formalism geometrizes and simplifies the
analysis. We apply our framework to the issue of scale versus conformal
invariance in AdS/CFT and obtain new perspective on the structure of asymptotic
expansions for AdS and flat spaces
Maximally Supersymmetric AdS Solutions and their Moduli Spaces

We study maximally supersymmetric AdS$_D$ solutions of gauged supergravities
in dimensions $D \geq 4$. We show that such solutions can only exist if the
gauge group after spontaneous symmetry breaking is a product of two reductive
groups $H_R \times H_\mathrm{mat}$, where $H_R$ is uniquely determined by the
dimension D and the number of supersymmetries N while $H_\mathrm{mat}$ is
unconstrained. This resembles the structure of the global symmetry groups of
the holographically dual SCFTs, where $H_R$ is interpreted as the R-symmetry
and $H_\mathrm{mat}$ as the flavor symmetry. Moreover, we discuss possible
supersymmetry preserving continuous deformations, which correspond to the
conformal manifolds of the dual SCFTs. Under the assumption that the scalar
manifold of the supergravity is a symmetric space we derive general group
theoretical conditions on these moduli. Using these results we determine the
AdS solutions of all gauged supergravities with more than 16 real supercharges.
We find that almost all of them do not have supersymmetry preserving
deformations with the only exception being the maximal supergravity in five
dimensions with a moduli space given by $SU(1,1)/U(1)$. Furthermore, we
determine the AdS solutions of four-dimensional N=3 supergravities and show
that they similarly do not admit supersymmetric moduli.Comment: 69 pages; v2: minor changes, references added, to appear in JHE
The Case for Future Hadron Colliders From $B \to K^{(*)} \mu^+ \mu^-$
  Decays

Recent measurements in $B \to K^{(*)} \mu^+ \mu^-$ decays are somewhat
discrepant with Standard Model predictions. They may be harbingers of new
physics at an energy scale potentially accessible to direct discovery. We
estimate the sensitivity of future hadron colliders to the possible new
particles that may be responsible for the anomalies: leptoquarks or
$Z^\prime$s. We consider luminosity upgrades for a 14 TeV LHC, a 33 TeV LHC,
and a 100 TeV $pp$ collider such as the FCC-hh. Coverage of $Z^\prime$ models
is excellent: for narrow particles, with perturbative couplings that may
explain the $b$-decay results for $Z^\prime$ masses up to 20 TeV, a 33 TeV 1
ab$^{-1}$ LHC is expected to cover most of the parameter space up to 8 TeV in
mass, whereas the 100 TeV FCC-hh with 10 ab$^{-1}$ will cover all of it. A
smaller portion of the leptoquark parameter space is covered by future
colliders: for example, in a $\mu^+\mu^-jj$ di-leptoquark search, a 100 TeV 10
ab$^{-1}$ collider has a projected sensitivity up to leptoquark masses of 12
TeV (extendable to 21 TeV with a strong coupling for single leptoquark
production), whereas leptoquark masses up to 41 TeV may in principle explain
the anomalies.Comment: 24 pages, 10 figures. v2: Improved discussion and references added,
  version submitted to JHE
Heavy charged scalars from $c\bar{s}$ fusion: A generic search strategy
  applied to a 3HDM with $\mathrm{U}(1) \times \mathrm{U}(1)$ family symmetry

We describe a class of three Higgs doublet models (3HDMs) with a softly
broken $\mathrm{U}(1) \times \mathrm{U}(1)$ family symmetry that enforces a
Cabibbo-like quark mixing while forbidding tree-level flavour changing neutral
currents. The hierarchy in the observed quark masses is partly explained by a
softer hierarchy in the vacuum expectation values of the three Higgs doublets.
As a consequence, the physical scalar spectrum contains a Standard Model (SM)
like Higgs boson $h_{125}$ while exotic scalars couple the strongest to the
second quark family, leading to rather unconventional discovery channels that
could be probed at the Large Hadron Collider. In particular, we describe a
search strategy for the lightest charged Higgs boson $H^{\pm}$, through the
process $c\bar s\to H^{+}\to W^+\,h_{125}$, using a multivariate analysis that
leads to an excellent discriminatory power against the SM background. Although
the analysis is applied to the proposed class of 3HDMs, we employ a
model-independent formulation such that it can be applied to any other model
with the same discovery channel.Comment: 30 pages, 7 figures, extended references and added clarifications in
  the model section. Added Fig. 7 and relevant discussion on the distribution
  of parameter points in the scan results. Fixed typos and misspellings.
  Published versio
Linear growth of the entanglement entropy and the Kolmogorov-Sinai rate

The rate of entropy production in a classical dynamical system is
characterized by the Kolmogorov-Sinai entropy rate $h_{\mathrm{KS}}$ given by
the sum of all positive Lyapunov exponents of the system. We prove a quantum
version of this result valid for bosonic systems with unstable quadratic
Hamiltonian. The derivation takes into account the case of time-dependent
Hamiltonians with Floquet instabilities. We show that the entanglement entropy
$S_A$ of a Gaussian state grows linearly for large times in unstable systems,
with a rate $\Lambda_A \leq h_{KS}$ determined by the Lyapunov exponents and
the choice of the subsystem $A$. We apply our results to the analysis of
entanglement production in unstable quadratic potentials and due to periodic
quantum quenches in many-body quantum systems. Our results are relevant for
quantum field theory, for which we present three applications: a scalar field
in a symmetry-breaking potential, parametric resonance during post-inflationary
reheating and cosmological perturbations during inflation. Finally, we
conjecture that the same rate $\Lambda_A$ appears in the entanglement growth of
chaotic quantum systems prepared in a semiclassical state.Comment: 50+17 Pages, 11 figure
Double-Trace Flows and the Swampland

We explore the idea that large $N$, non-supersymmetric conformal field
theories with a parametrically large gap to higher spin single-trace operators
may be obtained as infrared fixed points of relevant double-trace deformations
of superconformal field theories. After recalling the AdS interpretation and
some potential pathologies of such flows, we introduce a concrete example that
appears to avoid them: the ABJM theory at finite $k$, deformed by $\int\!{\cal
O}^2$, where ${\cal O}$ is the superconformal primary in the stress-tensor
multiplet. We address its relation to recent conjectures based on weak gravity
bounds, and discuss the prospects for a wider class of similarly viable flows.
Next, we proceed to analyze the spectrum and correlation functions of the
putative IR CFT, to leading non-trivial order in $1/N$. This includes analytic
computations of the change under double-trace flow of connected four-point
functions of ABJM superconformal primaries; and of the IR anomalous dimensions
of infinite classes of double-trace composite operators. These would be the
first analytic results for anomalous dimensions of finite-spin composite
operators in any large $N$ CFT$_3$ with an Einstein gravity dual.Comment: 25+13 pages. v2: refs added, minor clarification
Null hypersurface quantization, electromagnetic duality and asymptotic
  symmetries of Maxwell theory

In this paper we consider introducing careful regularization in the
quantization of Maxwell theory in the asymptotic null infinity. This allows
systematic discussions of the commutators in various boundary conditions, and
application of Dirac brackets accordingly in a controlled manner. This method
is most useful when we consider asymptotic charges that are not localized at
the boundary $u\to \pm \infty$ like large gauge transformations. We show that
our method reproduces the operator algebra in known cases, and it can be
applied to other space-time symmetry charges such as the BMS transformations.
We also obtain the asymptotic form of the U(1) charge following from the
electromagnetic duality in an explicitly EM symmetric Schwarz-Sen type action.
Using our regularization method, we demonstrate that the charge generates the
expected transformation of a helicity operator. Our method promises
applications in more generic theories.Comment: 26 pages, typos correcte
Towards the Holographic Dual of N = 2 SYK

The gravitational part of the holographic dual to the SYK model has been
conjectured to be Jackiw-Teitelboim (JT) gravity. In this paper we construct an
AdS2 background in N = (2,2) JT gravity and show that the gravitational
dynamics are - as in the N = 0 and N = 1 cases - fully captured by the
extrinsic curvature as an effective boundary action. This boundary term is
given by the super-Schwarzian of the N = 2 SYK model, thereby providing further
evidence of the JT/SYK duality. The chirality of this SYK model is reproduced
by the inherent chirality of axial N = (2,2) supergravity.Comment: 22 pages,v2 references added, typos correcte
Hessian eigenvalue distribution in a random Gaussian landscape

The energy landscape of multiverse cosmology is often modeled by a
multi-dimensional random Gaussian potential. The physical predictions of such
models crucially depend on the eigenvalue distribution of the Hessian matrix at
potential minima. In particular, the stability of vacua and the dynamics of
slow-roll inflation are sensitive to the magnitude of the smallest eigenvalues.
The Hessian eigenvalue distribution has been studied earlier, using the saddle
point approximation, in the leading order of $1/N$ expansion, where $N$ is the
dimensionality of the landscape. This approximation, however, is insufficient
for the small eigenvalue end of the spectrum, where sub-leading terms play a
significant role. We extend the saddle point method to account for the
sub-leading contributions. We also develop a new approach, where the eigenvalue
distribution is found as an equilibrium distribution at the endpoint of a
stochastic process (Dyson Brownian motion). The results of the two approaches
are consistent in cases where both methods are applicable. We discuss the
implications of our results for vacuum stability and slow-roll inflation in the
landscape.Comment: 33 pages, 10 figure
Continuous spin fields of mixed-symmetry type

We propose a description of continuous spin massless fields of mixed-symmetry
type in Minkowski space at the level of equations of motion. It is based on the
appropriately modified version of the constrained system originally used to
describe massless bosonic fields of mixed-symmetry type. The description is
shown to produce generalized versions of triplet, metric-like, and light-cone
formulations. In particular, for scalar continuous spin fields we reproduce the
Bekaert-Mourad formulation and the Schuster-Toro formulation. Because a
continuous spin system inevitably involves infinite number of fields,
specification of the allowed class of field configurations becomes a part of
its definition. We show that the naive choice leads to an empty system and
propose a suitable class resulting in the correct degrees of freedom. We also
demonstrate that the gauge symmetries present in the formulation are all
Stueckelberg-like so that the continuous spin system is not a genuine gauge
theory.Comment: 25 pages; v2: more comments, refs added, JHEP versio
Evolution of Complexity Following a Global Quench

The rate of complexification of a quantum state is conjectured to be bounded
from above by the average energy of the state. A different conjecture relates
the complexity of a holographic CFT state to the on-shell gravitational action
of a certain bulk region. We use 'complexity equals action' conjecture to study
the time evolution of the complexity of the CFT state after a global quench. We
find that the rate of growth of complexity is not only consistent with the
conjectured bound, but it also saturates the bound soon after the system has
achieved local equilibrium.Comment: 16 pages, 3 figures; V3: published versio
Gravity Dual of Two-Dimensional $\mathcal{N} = (2,2)^*$ Supersymmetric
  Yang-Mills Theory and Integrable Models

The 2D $\mathcal{N}=(2,2)^*$ supersymmetric Yang-Mills theory can be obtained
from the 2D $\mathcal{N}=(4,4)$ theory with a twisted mass deformation. In this
paper we construct the gravity dual theory of the 2D $\mathcal{N}=(2,2)^*$
supersymmetric $U(N)$ Yang-Mills theory at the large $N$ and large 't Hooft
coupling limit using the 5D gauged supergravity. In the UV regime, this
construction also provides the gravity dual of the 2D $\mathcal{N}=(2,2)^*$
$U(N)$ topological Yang-Mills-Higgs theory. We propose a triality in the UV
regime among integrable model, gauge theory and gravity, and we make some
checks of this relation at classical level.Comment: 49 pages, 3 figures; V2: typos corrected, more discussions adde
Bootstrapping the $(A_1,A_2)$ Argyres-Douglas theory

We apply bootstrap techniques in order to constrain the CFT data of the
$(A_1,A_2)$ Argyres-Douglas theory, which is arguably the simplest of the
Argyres-Douglas models. We study the four-point function of its single Coulomb
branch chiral ring generator and put numerical bounds on the low-lying spectrum
of the theory. Of particular interest is an infinite family of semi-short
multiplets labeled by the spin $\ell$. Although the conformal dimensions of
these multiplets are protected, their three-point functions are not. Using the
numerical bootstrap we impose rigorous upper and lower bounds on their values
for spins up to $\ell=20$. Through a recently obtained inversion formula, we
also estimate them for sufficiently large $\ell$, and the comparison of both
approaches shows consistent results. We also give a rigorous numerical range
for the OPE coefficient of the next operator in the chiral ring, and estimates
for the dimension of the first R-symmetry neutral non-protected multiplet for
small spin.Comment: 27 pages (21 plus one appendix), 7 figures; v2: minor improvments,
  matches JHEP versio