pinecone/core-2020-05-10-deduplication huggingface dataset:
Pole Inflation - Shift Symmetry and Universal Corrections

An appealing explanation for the Planck data is provided by inflationary
models with a singular non-canonical kinetic term: a Laurent expansion of the
kinetic function translates into a potential with a nearly shift-symmetric
plateau in canonical fields. The shift symmetry can be broken at large field
values by including higher-order poles, which need to be hierarchically
suppressed in order not to spoil the inflationary plateau. The herefrom
resulting corrections to the inflationary dynamics and predictions are shown to
be universal at lowest order and possibly to induce power loss at large angular
scales. At lowest order there are no corrections from a pole of just one order
higher and we argue that this phenomenon is related to the well-known extended
no-scale structure arising in string theory scenarios. Finally, we outline
which other corrections may arise from string loop effects.Comment: twocolumn, 9 pages, 1 figure; v2: clarifications and refs added, JHEP
  layout, 19 page
Double-soft behavior for scalars and gluons from string theory

We compute the leading double-soft behavior for gluons and for the scalars
obtained by dimensional reduction of a higher dimensional pure gauge theory,
from the scattering amplitudes of gluons and scalars living in the world-volume
of a Dp-brane of the bosonic string. In the case of gluons, we compute both the
double-soft behavior when the two soft gluons are contiguous as well as when
they are not contiguous. From our results, that are valid in string theory, one
can easily get the double-soft limit in gauge field theory by sending the
string tension to infinity.Comment: 25 pages, 1 figur
Searching for Standard Model Adjoint Scalars with Diboson Resonance
  Signatures

We explore the phenomenology of scalar fields in the adjoint representation
of SM gauge groups. We write a general set of dimension 5 effective operators
in which SM adjoint scalars couple to pairs of standard model bosons. Using
these effective operators, we explore new possible decay channels of a scalar
color octet into a gluon and a Z boson/ gluon and a photon. We recast several
analyses from Run I of the LHC to find constraints on an a scalar octet
decaying into these channels, and we project the discovery potential of color
octets in our gluon+photon channel for the 14 TeV run of LHC.Comment: 14 pages, 8 figures, 1 tabl
General Analysis of Dark Radiation in Sequestered String Models

We perform a general analysis of axionic dark radiation produced from the
decay of the lightest modulus in the sequestered LARGE Volume Scenario. We
discuss several cases depending on the form of the Kahler metric for visible
sector matter fields and the mechanism responsible for achieving a de Sitter
vacuum. The leading decay channels which determine dark radiation predictions
are to hidden sector axions, visible sector Higgses and SUSY scalars depending
on their mass. We show that in most of the parameter space of split SUSY-like
models squarks and sleptons are heavier than the lightest modulus. Hence dark
radiation predictions previously obtained for MSSM-like cases hold more
generally also for split SUSY-like cases since the decay channel to SUSY
scalars is kinematically forbidden. However the inclusion of string loop
corrections to the Kahler potential gives rise to a parameter space region
where the decay channel to SUSY scalars opens up, leading to a significant
reduction of dark radiation production. In this case, the simplest model with a
shift-symmetric Higgs sector can suppress the excess of dark radiation $\Delta
N_{eff}$ to values as small as 0.14, in perfect agreement with current
experimental bounds. Depending on the exact mass of the SUSY scalars all values
in the range 0.14 $\lesssim \Delta N_{eff} \lesssim$ 1.6 are allowed.
Interestingly dark radiation overproduction can be avoided also in the absence
of a Giudice-Masiero coupling.Comment: 30 pages, 5 figure
Composite Higgses with seesaw EWSB

We introduce a new class of Composite Higgs models in which electroweak
symmetry is broken by a seesaw-like mechanism. If a global symmetry is broken
sequentially at different scales, two sets of pseudo-Goldstone bosons will
arise, one set being typically heavier than the other. If two Composite Higgs
doublets mix, then the mass-squared of the lighter state can be driven
negative, and induce EWSB. We illustrate with the example $SO(6) \rightarrow
SO(5) \rightarrow SO(4)$, and derive an estimate of the light Higgs potential.
We find that the introduction of an extra scale can ease many of the tensions
present in conventional Composite Higgs models, especially those related to
fine-tuning. In particular we find that we can significantly raise the upper
bound on the mass of the elusive top partners.Comment: 19 pages, 2 figures. v2: JHEP version, mistake corrected, discussion
  on tuning and top-partners extende
Generalized $F$-Theorem and the $\epsilon$ Expansion

Some known constraints on Renormalization Group flow take the form of
inequalities: in even dimensions they refer to the coefficient $a$ of the Weyl
anomaly, while in odd dimensions to the sphere free energy $F$. In recent work
arXiv:1409.1937 it was suggested that the $a$- and $F$-theorems may be viewed
as special cases of a Generalized $F$-Theorem valid in continuous dimension.
This conjecture states that, for any RG flow from one conformal fixed point to
another, $\tilde F_{\rm UV} > \tilde F_{\rm IR}$, where $\tilde F=\sin (\pi
d/2)\log Z_{S^d}$. Here we provide additional evidence in favor of the
Generalized $F$-Theorem. We show that it holds in conformal perturbation
theory, i.e. for RG flows produced by weakly relevant operators. We also study
a specific example of the Wilson-Fisher $O(N)$ model and define this CFT on the
sphere $S^{4-\epsilon}$, paying careful attention to the beta functions for the
coefficients of curvature terms. This allows us to develop the $\epsilon$
expansion of $\tilde F$ up to order $\epsilon^5$. Pade extrapolation of this
series to $d=3$ gives results that are around $2-3\%$ below the free field
values for small $N$. We also study RG flows which include an anisotropic
perturbation breaking the $O(N)$ symmetry; we again find that the results are
consistent with $\tilde F_{\rm UV} > \tilde F_{\rm IR}$.Comment: 41 pages, 7 figures. v3: minor improvement
Fricke S-duality in CHL models

We consider four dimensional CHL models with sixteen spacetime
supersymmetries obtained from orbifolds of type IIA superstring on K3 x T^2 by
a Z_N symmetry acting (possibly) non-geometrically on K3. We show that most of
these models (in particular, for geometric symmetries) are self-dual under a
weak-strong duality acting on the heterotic axio-dilaton modulus S by a "Fricke
involution" S --> -1/NS. This is a novel symmetry of CHL models that lies
outside of the standard SL(2,Z)-symmetry of the parent theory, heterotic
strings on T^6. For self-dual models this implies that the lattice of purely
electric charges is N-modular, i.e. isometric to its dual up to a rescaling of
its quadratic form by N. We verify this prediction by determining the lattices
of electric and magnetic charges in all relevant examples. We also calculate
certain BPS-saturated couplings and verify that they are invariant under the
Fricke S-duality. For CHL models that are not self-dual, the strong coupling
limit is dual to type IIA compactified on T^6/Z_N, for some Z_N-symmetry
preserving half of the spacetime supersymmetries.Comment: 56 pages, 3 figures; v3: some minor mistakes correcte
Brane webs, $5d$ gauge theories and $6d$ $\mathcal{N}$$=(1,0)$ SCFT's

We study $5d$ gauge theories that go in the UV to $6d$ $\mathcal{N}$$=(1,0)$
SCFT. We focus on these theories that can be engineered in string theory by
brane webs. Given a theory in this class, we propose a method to determine the
$6d$ SCFT it goes to. We also discuss the implication of this to the
compactification of the resulting $6d$ SCFT on a torus to $4d$. We test and
demonstrate this method with a variety of examples.Comment: 61 pages, 51 figures; v2 typos corrected, version published in JHE
Confinement-Deconfinment Phase Transition for Heavy Quarks

We study confinement-deconfinement phase transition for heavy quarks in a
bottom-up holographic QCD model. We consider a black hole background in an
Einstein-Maxwell-scalar system and add probe open strings to the background.
Combining the various configurations of the open strings and the phase
structure of the black hole background itself, we obtain the
confinement-deconfinement phase diagram for heavy quarks in the holographic QCD
model.Comment: 23 pages, 14 figures, published in JHEP. arXiv admin note: text
  overlap with arXiv:1301.038
Natural Heavy Supersymmetry

We study how, as a result of the scanning of supersymmetry breaking during
the cosmological evolution, a relaxation mechanism can naturally determine a
hierarchy between the weak scale and the masses of supersymmetric particles.
Supersymmetry breaking is determined by QCD instanton effects, in an extremely
minimal setup in which a single field drives the relaxation and breaks
supersymmetry. Since gauginos are lighter than the other supersymmetric
particles by a one-loop factor, the theory is a realisation of Split
Supersymmetry free from the naturalness problem.Comment: 38 pages, 3 figures, version published in JHE
The F-theory geometry with most flux vacua

Applying the Ashok-Denef-Douglas estimation method to elliptic Calabi-Yau
fourfolds suggests that a single elliptic fourfold ${\cal M}_{\rm max}$ gives
rise to ${\cal O} (10^{272,000})$ F-theory flux vacua, and that the sum total
of the numbers of flux vacua from all other F-theory geometries is suppressed
by a relative factor of ${\cal O} (10^{-3000})$. The fourfold ${\cal M}_{\rm
max}$ arises from a generic elliptic fibration over a specific toric threefold
base $B_{\rm max}$, and gives a geometrically non-Higgsable gauge group of
$E_8^9 \times F_4^8 \times (G_2 \times SU(2))^{16}$, of which we expect some
factors to be broken by G-flux to smaller groups. It is not possible to tune an
$SU(5)$ GUT group on any further divisors in ${\cal M}_{\rm max}$, or even an
$SU(2)$ or $SU(3)$, so the standard model gauge group appears to arise in this
context only from a broken $E_8$ factor. The results of this paper can either
be interpreted as providing a framework for predicting how the standard model
arises most naturally in F-theory and the types of dark matter to be found in a
typical F-theory compactification, or as a challenge to string theorists to
explain why other choices of vacua are not exponentially unlikely compared to
F-theory compactifications on ${\cal M}_{\rm max}$.Comment: 19 pages, 2 figures, v3: minor corrections, clarifications,
  references adde
QCD Corrections to Pair Production of Type III Seesaw Leptons at Hadron
  Colliders

If kinematically accessible, hadron collider experiments provide an ideal
laboratory for the direct production of heavy lepton partners in Seesaw models.
In the context of the Type III Seesaw Mechanism, the $\mathcal{O}(\alpha_s)$
rate and shape corrections are presented for the pair production of
hypothetical, heavy $SU(2)_L$ triplet leptons in $pp$ collisions at $\sqrt{s}=$
13, 14, and 100 TeV. The next-to-leading order (NLO) $K$-factors span,
approximately, $K^{NLO}=1.1 - 1.4$ for both charged current and neutral current
processes over a triplet mass range $m_T = 100~\text{GeV}-2~\text{TeV}$. Total
production cross sections exhibit a $^{+5\%}_{-6\%}$ scale dependence at 14 TeV
and $\pm1\%$ at 100 TeV. The NLO differential $K$-factors for heavy lepton
kinematics are largely flat, suggesting that na\"ive scaling by the total
$K^{NLO}$ is reasonably justified. The resummed transverse momentum
distribution of the dilepton system is presented at leading logarithmic (LL)
accuracy. The effects of resummation are large in TeV-scale dilepton systems.
Discovery potential to heavy lepton pairs at 14 and 100 TeV is briefly
explored: At the High-Luminosity LHC, we estimate a $4.8-6.3\sigma$ discovery
potential maximally for $m_T = 1.5-1.6~\text{TeV}$ after 3000 fb$^{-1}$. With
300 (3000) fb$^{-1}$, there is $2\sigma$ sensitivity up to $m_T =
1.3-1.4~\text{TeV}~(1.7-1.8~\text{TeV})$ in the individual channels. At 100 TeV
and with 10 fb$^{-1}$, a $5\sigma$ discovery can be achieved for
$m_T=1.4-1.6~\text{TeV}$. Due to the factorization properties of Drell-Yan-type
systems, the fixed order and resummed calculations reduce to convolutions over
tree-level quantities.Comment: 30 pages in JHEP template. Published version, references add, text
  unchanged. Have a good da
Long-Lived Sleptons at the LHC and a 100 TeV Proton Collider

We study the prospects for long-lived charged particle (LLCP) searches at
current and future LHC runs and at a 100 TeV pp collider, using Drell-Yan
slepton pair production as an example. Because momentum measurements become
more challenging for very energetic particles, we carefully treat the expected
momentum resolution. At the same time, a novel feature of 100 TeV collisions is
the significant energy loss of energetic muons in detectors. We use this to
help discriminate between muons and LLCPs. We find that the 14 TeV LHC with an
integrated luminosity of 3 ab$^{-1}$ can probe LLCP slepton masses up to 1.2
TeV, and a 100 TeV pp collider with 3 ab$^{-1}$ can probe LLCP slepton masses
up to 4 TeV, using time-of-flight measurements. These searches will have
striking implications for dark matter, with the LHC definitively testing the
possibility of slepton-neutralino co-annihilating WIMP dark matter, and with
the LHC and future hadron colliders having a strong potential for discovering
LLCPs in models with superWIMP dark matter.Comment: 24 pages, 9 figures, revised to match published versio
Exploring Flavor-Dependent Long-Range Forces in Long-Baseline Neutrino
  Oscillation Experiments

The Standard Model gauge group can be extended with minimal matter content by
introducing anomaly free U(1) symmetry, such as $L_e-L_{\mu}$ or
$L_e-L_{\tau}$. If the neutral gauge boson corresponding to this abelian
symmetry is ultra-light, then it will give rise to flavor-dependent long-range
leptonic force, which can have significant impact on neutrino oscillations. For
an instance, the electrons inside the Sun can generate a flavor-dependent
long-range potential at the Earth surface, which can suppress the $\nu_{\mu}
\to \nu_e$ appearance probability in terrestrial experiments. The sign of this
potential is opposite for anti-neutrinos, and affects the oscillations of
(anti-)neutrinos in different fashion. This feature invokes fake CP-asymmetry
like the SM matter effect and can severely affect the leptonic CP-violation
searches in long-baseline experiments. In this paper, we study in detail the
possible impacts of these long-range flavor-diagonal neutral current
interactions due to $L_e-L_{\mu}$ symmetry, when (anti-)neutrinos travel from
Fermilab to Homestake (1300 km) and CERN to Pyh\"asalmi (2290 km) in the
context of future high-precision superbeam facilities, DUNE and LBNO
respectively. If there is no signal of long-range force, DUNE (LBNO) can place
stringent constraint on the effective gauge coupling $\alpha_{e\mu} < 1.9
\times 10^{-53}~(7.8 \times 10^{-54})$ at 90% C.L., which is almost 30 (70)
times better than the existing bound from the Super-Kamiokande experiment. We
also observe that if $\alpha_{e\mu} \geq 2 \times 10^{-52}$, the CP-violation
discovery reach of these future facilities vanishes completely. The mass
hierarchy measurement remains robust in DUNE (LBNO) if $\alpha_{e\mu} < 5
\times 10^{-52}~(10^{-52})$.Comment: 44 pages, 54 pdf figures, 7 tables. Published in JHE
Universal entanglement for higher dimensional cones

The entanglement entropy of a generic $d$-dimensional conformal field theory
receives a regulator independent contribution when the entangling region
contains a (hyper)conical singularity of opening angle $\Omega$, codified in a
function $a^{(d)}(\Omega)$. In arXiv:1505.04804, we proposed that for
three-dimensional conformal field theories, the coefficient $\sigma$
characterizing the smooth surface limit of such contribution
($\Omega\rightarrow \pi$) equals the stress tensor two-point function charge
$C_{ T}$, up to a universal constant. In this paper, we prove this relation for
general three-dimensional holographic theories, and extend the result to
general dimensions. In particular, we show that a generalized coefficient
$\sigma^{ (d)}$ can be defined for (hyper)conical entangling regions in the
almost smooth surface limit, and that this coefficient is universally related
to $C_{ T}$ for general holographic theories, providing a general formula for
the ratio $\sigma^{ (d)}/C_{ T}$ in arbitrary dimensions. We conjecture that
the latter ratio is universal for general CFTs. Further, based on our recent
results in arXiv:1507.06997, we propose an extension of this relation to
general R\'enyi entropies, which we show passes several consistency checks in
$d=4$ and $d=6$.Comment: 22 pages, 3 figures, 2 tables; v3: minor modifications to match
  published version, references adde
Lepton Flavor Violating Radiative Decays in EW-Scale $\nu_R$ Model: An
  Update

We perform an updated analysis for the one-loop induced lepton flavor
violating radiative decays $l_i \to l_j \gamma$ in an extended mirror model.
Mixing effects of the neutrinos and charged leptons constructed with a
horizontal $A_4$ symmetry are also taken into account. Current experimental
limit and projected sensitivity on the branching ratio of $\mu \to e \gamma$
are used to constrain the parameter space of the model. Calculations of two
related observables, the electric and magnetic dipole moments of the leptons,
are included. Implications concerning the possible detection of mirror leptons
at the LHC and the ILC are also discussed.Comment: 9 figures, 36 single-side pages. Updated email addresses and
  referenc
Towards 2+4 formulation of M5-brane

We present an attempt to formulate an action for the worldvolume theory of a
single M5-brane, based on the splitting of the six worldvolume directions into
2+4, which breaks manifest Lorentz invariance from $SO(1,5)$ to $SO(1,1)\times
SO(4)$. To this end, an action for the free six--dimensional (2,0) chiral
tensor multiplet, and separately, a nonlinearly interacting chiral 2-form
action are constructed. By studying the Lagrangian formulation for the chiral
2-form with 2+4 splitting, it is suggested that, if exists, the modified
diffeomorphism of the theory on curved six--dimensional space--time is less
trivial than its 1+5 and 3+3 counterpart, thus hindering the coupling of the
chiral 2-form to the induced metric on the worldvolume of the M5-brane. We
discuss difficulties of further generalisation of the theory. Finally, in terms
of Hamiltonian analysis, we show that the naively gauge-fixed
failed-PST-covariantised Lagrangian has the correct number of degrees of
freedom, and satisfies the hyper--surface deformation algebra.Comment: 27 pages, no figur
Black holes with a single Killing vector field: black resonators

We numerically construct asymptotically anti-de Sitter (AdS) black holes in
four dimensions that contain only a single Killing vector field. These
solutions, which we coin black resonators, link the superradiant instability of
Kerr-AdS to the nonlinear weakly turbulent instability of AdS by connecting the
onset of the superradiance instability to smooth, horizonless geometries called
geons. Furthermore, they demonstrate non-uniqueness of Kerr-AdS by sharing
asymptotic charges. Where black resonators coexist with Kerr-AdS, we find that
the black resonators have higher entropy. Nevertheless, we show that black
resonators are unstable and comment on the implications for the endpoint of the
superradiant instability.Comment: 5 pages, 4 figure
Search for Heavy Right-Handed Neutrinos at the LHC and Beyond in the
  Same-Sign Same-Flavor Leptons Final State

In this study we explore the LHC's Run II potential to the discovery of heavy
Majorana neutrinos, with luminosities between $30$ and $3000$ fb$^{-1}$ in the
$l^{\pm}l^{\pm}j~j$ final state. Given that there exist many models for
neutrino mass generation, even within the Type I seesaw framework, we use a
simplified model approach and study two simple extensions to the Standard
Model, one with a single heavy Majorana neutrino, singlet under the Standard
Model gauge group, and a limiting case of the left-right symmetric model. We
then extend the analysis to a future hadron collider running at $100$ TeV
center of mass energies. This extrapolation in energy allows us to study the
relative importance of the resonant production versus gauge boson fusion
processes in the study of Majorana neutrinos at hadron colliders. We analyze
and propose different search strategies designed to maximize the discovery
potential in either the resonant production or the gauge boson fusion modes
Exact solutions and spacetime singularities in nonlocal gravity

We give here a list of exact classical solutions of a large class of weakly
nonlocal theories of gravity, which are unitary and super-renormalizable (or
finite) at quantum level. It is explicitly shown that flat and Ricci-flat
spacetimes as well as maximally symmetric manifolds are exact solutions of the
equation of motion. Therefore, well-known physical spacetimes like
Schwarzschild, Kerr, (Anti-) de Sitter serve as solutions for standard matter
content. In dimension higher than four we can also have Anti-de Sitter
solutions in the presence of positive cosmological constant. We pedagogically
show how to obtain these exact solutions. Furthermore, for another version of
the theory, written in the Weyl basis, Friedmann-Robertson-Walker (FRW)
spacetimes are also exact solutions, when the matter content is given by
conformal matter (radiation). We also comment on the presence of singularities
and possible resolution of them in finite and conformally invariant theories.
"Delocalization" is proposed as a way to solve the black hole singularity
problem. In order to solve the problem of cosmological singularities it seems
crucial to have a conformally invariant or asymptotically free quantum
gravitational theory.Comment: 33 page
The moduli space of instantons on an ALE space from 3d $\mathcal{N}=4$
  field theories

The moduli space of instantons on an ALE space is studied using the moduli
space of $\mathcal{N}=4$ field theories in three dimensions. For instantons in
a simple gauge group $G$ on $\mathbb{C}^2/\mathbb{Z}_n$, the Hilbert series of
such an instanton moduli space is computed from the Coulomb branch of the
quiver given by the affine Dynkin diagram of $G$ with flavour nodes of unitary
groups attached to various nodes of the Dynkin diagram. We provide a simple
prescription to determine the ranks and the positions of these flavour nodes
from the order of the orbifold $n$ and from the residual subgroup of $G$ that
is left unbroken by the monodromy of the gauge field at infinity. For $G$ a
simply laced group of type $A$, $D$ or $E$, the Higgs branch of such a quiver
describes the moduli space of instantons in projective unitary group $PU(n)
\cong U(n)/U(1)$ on orbifold $\mathbb{C}^2/\hat{G}$, where $\hat{G}$ is the
discrete group that is in McKay correspondence to $G$. Moreover, we present the
quiver whose Coulomb branch describes the moduli space of $SO(2N)$ instantons
on a smooth ALE space of type $A_{2n-1}$ and whose Higgs branch describes the
moduli space of $PU(2n)$ instantons on a smooth ALE space of type $D_{N}$.Comment: 32 pages and a number of figures. Version 2: Improvements on
  projective unitary groups and on reference