pinecone/core-2020-05-10-deduplication huggingface dataset:
The long flow to freedom

Two-dimensional field theories do not have a moduli space of vacua. Instead,
it is common that their low-energy behavior is a sigma model with a target
space. When this target space is compact its renormalization group flow is
standard. When it is non-compact the continuous spectrum of operators can
change the qualitative behavior. Here we discuss two-dimensional gauge theories
with N=(2,2) supersymmetry. We focus on two specific theories, for which we
argue that they flow to free chiral multiplets at low energies: the U(1) gauge
theory with one flavor (two chiral superfields with charges plus and minus one)
and a non-zero Fayet-Iliopoulos term, and pure SU(N) gauge theories. We argue
that the renormalization group flow of these theories has an interesting order
of limits issue. Holding the position on the target space fixed, the space
flattens out under the renormalization group. On the other hand, if we first go
to infinity on the target space and then perform the renormalization group, we
always have a non-trivial space, e.g. a cone with a deficit angle. We explain
how to interpret low-energy dualities between theories with non-compact target
spaces. We expect a similar qualitative behavior also for other non-compact
sigma models, even when they do not flow to free theories.Comment: 14 page
Unblinding the Dark Matter Blind Spots

The dark matter (DM) blind spots in the Minimal Supersymmetric Standard Model
(MSSM) refer to the parameter regions where the couplings of the DM particles
to the $Z$-boson or the Higgs boson are almost zero, leading to vanishingly
small signals for the DM direct detections. In this paper, we carry out
comprehensive analyses for the DM searches under the blind-spot scenarios in
MSSM. Guided by the requirement of acceptable DM relic abundance, we explore
the complementary coverage for the theory parameters at the LHC, the projection
for the future underground DM direct searches, and the indirect searches from
the relic DM annihilation into photons and neutrinos. We find that (i) the
spin-independent (SI) blind spots may be rescued by the spin-dependent (SD)
direct detection in the future underground experiments, and possibly by the
indirect DM detections from IceCube and SuperK neutrino experiments; (ii) the
detection of gamma rays from Fermi-LAT may not reach the desirable sensitivity
for searching for the DM blind-spot regions; (iii) the SUSY searches at the LHC
will substantially extend the discovery region for the blind-spot parameters.
The dark matter blind spots thus may be unblinded with the collective efforts
in future DM searches.Comment: 30 pages, 18 figures; Minor corrections, references updated, version
  published in JHE
Higher-spin charges in Hamiltonian form. II. Fermi fields

We build the asymptotic higher-spin charges associated with "improper" gauge
transformations for fermionic higher-spin gauge fields on Anti de Sitter
backgrounds of arbitrary dimension. This is achieved within the canonical
formalism. We consider massless fields of spin s+1/2, described by a symmetric
spinor-tensor of rank s in the Fang-Fronsdal approach. We begin from a detailed
analysis of the spin 5/2 example, for which we cast the Fang-Fronsdal action in
Hamiltonian form, we derive the charges and we propose boundary conditions on
the canonical variables that secure their finiteness. We then extend the
computation of charges and the characterisation of boundary conditions to
arbitrary half-integer spin. Our construction generalises to higher-spin
fermionic gauge fields the known Hamiltonian derivation of supercharges in AdS
supergravity.Comment: 42 pages. References added; version to appear in JHE
Relative entropy of excited states in conformal field theories of
  arbitrary dimensions

Extending our previous work, we study the relative entropy between the
reduced density matrices obtained from globally excited states in conformal
field theories of arbitrary dimensions. We find a general formula in the small
subsystem size limit. When one of the states is the vacuum of the CFT, our
result matches with the holographic entanglement entropy computations in the
corresponding bulk geometries, including AdS black branes. We also discuss the
first asymmetric part of the relative entropy and comment on some implications
of the results on the distinguishability of black hole microstates in AdS/CFT.Comment: 30 page
Fusion basis for lattice gauge theory and loop quantum gravity

We introduce a new basis for the gauge-invariant Hilbert space of lattice
gauge theory and loop quantum gravity in $(2+1)$ dimensions, the fusion basis.
In doing so, we shift the focus from the original lattice (or spin-network)
structure directly to that of the magnetic (curvature) and electric (torsion)
excitations themselves. These excitations are classified by the irreducible
representations of the Drinfel'd double of the gauge group, and can be readily
"fused" together by studying the tensor product of such representations. We
will also describe in detail the ribbon operators that create and measure these
excitations and make the quasi-local structure of the observable algebra
explicit. Since the fusion basis allows for both magnetic and electric
excitations from the onset, it turns out to be a precious tool for studying the
large scale structure and coarse-graining flow of lattice gauge theories and
loop quantum gravity. This is in neat contrast with the widely used
spin-network basis, in which it is much more complicated to account for
electric excitations, i.e. for Gau\ss~constraint violations, emerging at larger
scales. Moreover, since the fusion basis comes equipped with a hierarchical
structure, it readily provides the language to design states with sophisticated
multi-scale structures. Another way to employ this hierarchical structure is to
encode a notion of subsystems for lattice gauge theories and $(2+1)$ gravity
coupled to point particles. In a follow-up work, we will exploit this notion to
provide a new definition of entanglement entropy for these theories.Comment: 72 page
N=4 super-Yang-Mills in LHC superspace. Part I: Classical and quantum
  theory

We present a formulation of the maximally supersymmetric N=4 gauge theory in
Lorentz harmonic chiral (LHC) superspace. It is closely related to the twistor
formulation of the theory but employs the simpler notion of Lorentz harmonic
variables. They parametrize a two-sphere and allow us to handle efficiently
infinite towers of higher-spin auxiliary fields defined on ordinary space-time.
In this approach the chiral half of N=4 supersymmetry is manifest. The other
half is realized non-linearly and the algebra closes on shell. We give a
straightforward derivation of the Feynman rules in coordinate space. We show
that the LHC formulation of the N=4 super-Yang-Mills theory is remarkably
similar to the harmonic superspace formulation of the N=2 gauge and
hypermultiplet matter theories. In the twin paper arXiv:1601.06804 we apply the
LHC formalism to the study of the non-chiral multipoint correlation functions
of the N=4 stress-tensor supermultiplet.Comment: 51 pages, 4 figures; v2: Appendix B on the propagators in momentum
  space added. A more detailed comparison with the twistor approach given in
  Appendix
Revisiting gravitino dark matter in thermal leptogenesis

In this paper, we revisit the gravitino dark matter scenario in the presence
of the bilinear $R$-parity violating interaction. In particular, we discuss a
consistency with the thermal leptogenesis. For a high reheating temperature
required for the thermal leptogenesis, the gravitino dark matter tends to be
overproduced, which puts a severe upper limit on the gluino mass. As we will
show, a large portion of parameter space of the gravitino dark matter scenario
has been excluded by combining the constraints from the gravitino abundance and
the null results of the searches for the superparticles at the LHC experiments.
In particular, the models with the stau (and other charged slepton) NLSP has
been almost excluded by the searches for the long-lived charged particles at
the LHC unless the required reheating temperature is somewhat lowered by
assuming, for example, a degenerated right-handed neutrino mass spectrum.Comment: 26 pages, 5 figure
Supergravity Backgrounds for Four-Dimensional Maximally Supersymmetric
  Yang-Mills

In this note, we describe supersymmetric backgrounds for the four-dimensional
maximally supersymmetric Yang-Mills theory. As an extension of the method of
Festuccia and Seiberg to sixteen supercharges in four dimensions, we utilize
the coupling of the gauge theory to maximally extended conformal supergravity.
Included among the fields of the conformal supergravity multiplet is the
complexified coupling parameter of the gauge theory; therefore, backgrounds
with spacetime varying coupling--such as appear in F-theory and Janus
configurations--are naturally included in this formalism. We demonstrate this
with a few examples from past literature.Comment: 22 pages, LaTeX; v2: typos corrected; v3: reference added, published
  versio
Free box^k Scalar Conformal Field Theory

We consider the generalizations of the free U(N) and O(N) scalar conformal
field theories to actions with higher powers of the Laplacian box^k, in general
dimension d. We study the spectra, Verma modules, anomalies and OPE of these
theories. We argue that in certain d and k, the spectrum contains zero norm
operators which are both primary and descendant, as well as extension operators
which are neither primary nor descendant. In addition, we argue that in even
dimensions d <= 2k, there are well-defined operator algebras which are related
to the box^k theories and are novel in that they have a finite number of
single-trace states.Comment: 65 pages, 10 figures. v2 clarifications, corrections and refs,
  version appearing in JHE
Modifications to Holographic Entanglement Entropy in Warped CFT

In arXiv:1601.02634 it was observed that asymptotic boundary conditions play
an important role in the study of holographic entanglement beyond AdS/CFT. In
particular, the Ryu-Takayanagi proposal must be modified for warped AdS$_3$
(WAdS$_3$) with Dirichlet boundary conditions. In this paper, we consider
AdS$_3$ and WAdS$_3$ with Dirichlet-Neumann boundary conditions. The
conjectured holographic duals are warped conformal field theories (WCFTs),
featuring a Virasoro-Kac-Moody algebra. We provide a holographic calculation of
the entanglement entropy and R\'{e}nyi entropy using AdS$_3$/WCFT and
WAdS$_3$/WCFT dualities. Our bulk results are consistent with the WCFT results
derived by Castro-Hofman-Iqbal using the Rindler method. Comparing with
arXiv:1601.02634, we explicitly show that the holographic entanglement entropy
is indeed affected by boundary conditions. Both results differ from the
Ryu-Takayanagi proposal, indicating new relations between spacetime geometry
and quantum entanglement for holographic dualities beyond AdS/CFT.Comment: 39 pages, 3 figures, published versio
$\Lambda_b\to\Lambda_c\tau\bar\nu_\tau$ decay in scalar and vector
  leptoquark scenarios

It has been shown that the anomalies observed in $\bar B\to
D^{(\ast)}\tau\bar\nu_\tau$ and $\bar B\to \bar K\ell^+\ell^-$ decays can be
resolved by adding a single scalar or vector leptoquark to the Standard Model,
while constraints from other precision measurements in the flavour sector can
be satisfied without fine-tuning. To further explore these two interesting
scenarios, in this paper, we study their effects in the semi-leptonic
$\Lambda_b\to\Lambda_c\tau\bar\nu_\tau$ decay. Using the best-fit solutions for
the operator coefficients allowed by the current data of mesonic decays, we
find that (i) the two scenarios give similar amounts of enhancements to the
branching fraction $\mathcal B(\Lambda_b\to\Lambda_c\tau\bar\nu_\tau)$ and the
ratio $R_{\Lambda_c}=\mathcal B(\Lambda_b\to\Lambda_c
\tau\bar\nu_\tau)/\mathcal B(\Lambda_b\to\Lambda_c\ell\bar\nu_\ell)$, (ii) the
two best-fit solutions in each of these two scenarios are also
indistinguishable from each other, (iii) both scenarios give nearly the same
predictions as those of the Standard Model for the longitudinal polarizations
of $\Lambda_c$ and $\tau$ as well as the lepton-side forward-backward
asymmetry. With future measurements of these observables in
$\Lambda_b\to\Lambda_c\tau\bar\nu_\tau$ decay at the LHCb, the two leptoquark
scenarios could be further tested, and even differentiated from the other NP
explanations for the $R_{D^{(\ast)}}$ anomalies. We also discuss the
feasibility for the measurements of these observables at the LHC and the future
$e^+e^-$ colliders.Comment: 29 pages, 4 tables and 2 figures; More references and the feasibility
  for the measurements of the observables in these decays at the LHC and the
  future $e^+e^-$ colliders added, final version published in the journa
Stringy horizons and generalized FZZ duality in perturbation theory

We study scattering amplitudes in two-dimensional string theory on a black
hole bakground. We start with a simple derivation of the
Fateev-Zamolodchikov-Zamolodchikov (FZZ) duality, which associates correlation
functions of the sine-Liouville integrable model on the Riemann sphere to
tree-level string amplitudes on the Euclidean two-dimensional black hole. This
derivation of FZZ duality is based on perturbation theory, and it relies on a
trick originally due to Fateev, which involves duality relations between
different Selberg type integrals. This enables us to rewrite the correlation
functions of sine-Liouville theory in terms of a special set of correlators in
the gauged Wess-Zumino-Witten (WZW) theory, and use this to perform further
consistency checks of the recently conjectured Generalized FZZ (GFZZ) duality.
In particular, we prove that n-point correlation functions in sine-Liouville
theory involving n-2 winding modes actually coincide with the correlation
functions in the SL(2,R)/U(1) gauged WZW model that include n-2 oscillator
operators of the type described by Giveon, Itzhaki and Kutasov in reference
arXiv:1603.05822. This proves the GFZZ duality for the case of tree level
maximally winding violating n-point amplitudes with arbitrary $n$. We also
comment on the connection between GFZZ and other marginal deformations
previously considered in the literature.Comment: 19 page
Thermodynamics of hairy black holes in Lovelock gravity

We perform a thorough study of the thermodynamic properties of a class of
Lovelock black holes with conformal scalar hair arising from coupling of a real
scalar field to the dimensionally extended Euler densities. We study the
linearized equations of motion of the theory and describe constraints under
which the theory is free from ghosts/tachyons. We then consider, within the
context of black hole chemistry, the thermodynamics of the hairy black holes in
the Gauss-Bonnet and cubic Lovelock theories. We clarify the connection between
isolated critical points and thermodynamic singularities, finding a one
parameter family of these critical points which occur for well-defined
thermodynamic parameters. We also report on a number of novel results,
including `virtual triple points' and the first example of a
`$\lambda$-line'---a line of second order phase transitions---in black hole
thermodynamics.Comment: 62 pages, 30 figures. Minor changes and typos corrected. Updated to
  match published versio
Higgs-otic Inflation and Moduli Stabilization

We study closed-string moduli stabilization in Higgs-otic inflation in Type
IIB orientifold backgrounds with fluxes. In this setup large-field inflation is
driven by the vacuum energy of mobile D7-branes. Imaginary selfdual (ISD)
three-form fluxes in the background source a $\mu$-term and the necessary
monodromy for large field excursions while imaginary anti-selfdual (IASD)
three-form fluxes are sourced by non-perturbative contributions to the
superpotential necessary for moduli stabilization. We analyze K\"ahler moduli
stabilization and backreaction on the inflaton potential in detail. Confirming
results in the recent literature, we find that integrating out heavy K\"ahler
moduli leads to a controlled flattening of the inflaton potential. We quantify
the flux tuning necessary for stability even during large-field inflation.
Moreover, we study the backreaction of supersymmetrically stabilized complex
structure moduli and the axio-dilaton in the K\"ahler metric of the inflaton.
Contrary to previous findings, this backreaction can be pushed far out in field
space if a similar flux tuning as in the K\"ahler sector is possible. This
allows for a trans-Planckian field range large enough to support inflation.Comment: 42 pages, 10 figures, v2: comments and references added. Published
  versio
Linearity of Holographic Entanglement Entropy

We consider the question of whether the leading contribution to the
entanglement entropy in holographic CFTs is truly given by the expectation
value of a linear operator as is suggested by the Ryu-Takayanagi formula. We
investigate this property by computing the entanglement entropy, via the
replica trick, in states dual to superpositions of macroscopically distinct
geometries and find it consistent with evaluating the expectation value of the
area operator within such states. However, we find that this fails once the
number of semi-classical states in the superposition grows exponentially in the
central charge of the CFT. Moreover, in certain such scenarios we find that the
choice of surface on which to evaluate the area operator depends on the density
matrix of the entire CFT. This nonlinearity is enforced in the bulk via the
homology prescription of Ryu-Takayanagi. We thus conclude that the homology
constraint is not a linear property in the CFT. We also discuss the existence
of entropy operators in general systems with a large number of degrees of
freedom.Comment: 60 pages, 8 figures; v2: minor clarifications and new references
  adde
N=1 Deformations and RG Flows of N=2 SCFTs

We study certain N=1 preserving deformations of four-dimensional N=2
superconformal field theories (SCFTs) with non-abelian flavor symmetry. The
deformation is described by adding an N=1 chiral multiplet transforming in the
adjoint representation of the flavor symmetry with a superpotential coupling,
and giving a nilpotent vacuum expectation value to the chiral multiplet which
breaks the flavor symmetry. This triggers a renormalization group flow to an
infrared SCFT. Remarkably, we find classes of theories flow to enhanced N=2
supersymmetric fixed points in the infrared under the deformation. They include
generalized Argyres-Douglas theories and rank-one SCFTs with non-abelian flavor
symmetries. Most notably, we find renormalization group flows from the deformed
conformal SQCDs to the $(A_1, A_n)$ Argyres-Douglas theories. From these
"Lagrangian descriptions," we compute the full superconformal indices of the
$(A_1, A_n)$ theories and find agreements with the previous results.
Furthermore, we study the cases, including the $T_N$ and $R_{0,N}$ theories of
class $\mathcal{S}$ and some of rank-one SCFTs, where the deformation gives
genuine N=1 fixed points.Comment: 45 pages, v2: added a paragraph on SUSY enhancement from the index.
  Minor corrections. To appear in JHE
Complex linear superfields, Supercurrents and Supergravities

We present expressions for the supercurrents generated by a generic
$4D,~\mathcal{N}=1$ theory of complex linear superfield $\Sigma$. We verify
that these expressions satisfy the appropriate superspace conservation
equations. Furthermore, we discuss the component projection in order to derive
expressions for the energy-momentum tensor, the supersymmetry current and the
R-symmetry current when available. In addition, we discuss aspects of the
coupling of the theory to supergravity. Specifically, we present a
straightforward method to select the appropriate formulations of supergravity
that one must use in order to do the coupling. This procedure is controlled by
a superfield X originating from the Super-Poincar\'{e} invariance of the
theory. We apply these results to examples of theories with higher derivative
terms
Unified picture of non-geometric fluxes and T-duality in double field
  theory via graded symplectic manifolds

We give a systematic derivation of the local expressions of the NS H-flux,
geometric F- as well as non-geometric Q- and R-fluxes in terms of bivector
beta- and two-form B-potentials including vielbeins. They are obtained using a
supergeometric method on QP-manifolds by twist of the standard Courant
algebroid on the generalized tangent space without flux. Bianchi identities of
the fluxes are easily deduced. We extend the discussion to the case of the
double space and present a formulation of T-duality in terms of canonical
transformations between graded symplectic manifolds. Finally, the construction
is compared to the formerly introduced Poisson Courant algebroid, a Courant
algebroid on a Poisson manifold, as a model for R-flux.Comment: 44 page
Vector-Like Quarks and Leptons, SU(5) $\otimes$ SU(5) Grand Unification,
  and Proton Decay

SU(5) $\otimes$ SU(5) provides a minimal grand unification scheme for
fermions and gauge forces if there are vector-like quarks and leptons in
nature. We explore the gauge coupling unification in a non-supersymmetric model
of this type, and study its implications for proton decay. The properties of
vector-like quarks and intermediate scales that emerge from coupling
unification play a central role in suppressing proton decay. We find that in
this model, the familiar decay mode $p \to e^+ \pi^0$ may have a partial
lifetime within the reach of currently planned experiments
Characterization of Unruh Channel in the context of Open Quantum Systems

We show through the Choi matrix approach that the effect of Unruh
acceleration on a qubit is similar to the interaction of the qubit with a
vacuum bath, despite the finiteness of the Unruh temperature. Thus, rather
counterintuitvely, from the perspective of decoherence in this framework, the
particle experiences a vacuum bath with a temperature-modified interaction
strength, rather than a thermal bath. We investigate how this "relativistic
decoherence" is modified by the presence of environmentally induced
decoherence, by studying the degradation of quantum information, as quantified
by parameters such as nonlocality, teleportation fidelity, entanglement,
coherence and quantum measurement-induced disturbance (a discord-like measure).
Also studied are the performance parameters such as gate and channel fidelity.
We highlight the distinction between dephasing and dissipative environmental
interactions, by considering the actions of quantum non-demolition and squeezed
generalized amplitude damping channels, respectively, where, in particular,
squeezing is shown to be a useful quantum resource.Comment: 15 pages, 19 figure
Phenomenology of Enhanced Light Quark Yukawa Couplings and the $W^\pm h$
  Charge Asymmetry

I propose the measurement of the $W^\pm h$ charge asymmetry as a consistency
test for the Standard Model (SM) Higgs, which is sensitive to enhanced Yukawa
couplings of the first and second generation quarks. I present a collider
analysis for the charge asymmetry in the same-sign lepton final state, $p p \to
W^\pm h \to (\ell^\pm \nu) (\ell^\pm \nu jj)$, aimed at discovery significance
for the SM $W^\pm h$ production mode in each charge channel with 300 fb$^{-1}$
of 14 TeV LHC data. Using this decay mode, I estimate the statistical precision
on the charge asymmetry should reach 0.4\% with 3 ab$^{-1}$ luminosity,
enabling a strong consistency test of the SM Higgs hypothesis. I also discuss
direct and indirect constraints on light quark Yukawa couplings from direct and
indirect probes of the Higgs width as well as Tevatron and Large Hadron
Collider Higgs data. While the main effect from enhanced light quark Yukawa
couplings is a rapid increase in the total Higgs width, such effects could be
mitigated in a global fit to Higgs couplings, leaving the $W^\pm h$ charge
asymmetry as a novel signature to test directly the Higgs couplings to light
quarks.Comment: 20 pages, 2 figures; v2, expanded discussion of PDF uncertainties,
  charge asymmetry figure updated to NLO QCD accuracy, version to be published
  in JHE