pinecone/core-2020-05-10-deduplication huggingface dataset:
The ATLAS Diboson Resonance in Non-Supersymmetric SO(10)

SO(10) grand unification accommodates intermediate gauge symmetries with
which gauge coupling unification can be realized without supersymmetry. In this
paper, we discuss the possibility that a new massive gauge boson associated
with an intermediate gauge symmetry explains the excess observed in the diboson
resonance search recently reported by the ATLAS experiment. The model we find
has two intermediate symmetries, $SU(4)_C \otimes SU(2)_L \otimes SU(2)_R$ and
$SU(3)_C \otimes SU(2)_L \otimes SU(2)_R \otimes U(1)_{B-L}$, where the latter
gauge group is broken at the TeV scale. This model achieves gauge coupling
unification with a unification scale sufficiently high to avoid proton decay.
In addition, this model provides a good dark matter candidates, whose stability
is guaranteed by a $Z_2$ symmetry present after the spontaneous breaking of the
intermediate gauge symmetries. We also discuss prospects for testing these
models in the forthcoming LHC experiments and dark matter detection
experiments.Comment: 22 pages, 2 figure
CP Violation in Heavy MSSM Higgs Scenarios

We introduce and explore new heavy Higgs scenarios in the Minimal
Supersymmetric Standard Model (MSSM) with explicit CP violation, which have
important phenomenological implications that may be testable at the LHC. For
soft supersymmetry-breaking scales M_S above a few TeV and a charged Higgs
boson mass M_H+ above a few hundred GeV, new physics effects including those
from explicit CP violation decouple from the light Higgs boson sector. However,
such effects can significantly alter the phenomenology of the heavy Higgs
bosons while still being consistent with constraints from low-energy
observables, for instance electric dipole moments. To consider scenarios with a
charged Higgs boson much heavier than the Standard Model (SM) particles but
much lighter than the supersymmetric particles, we revisit previous
calculations of the MSSM Higgs sector. We compute the Higgs boson masses in the
presence of CP violating phases, implementing improved matching and
renormalization group (RG) effects, as well as two-loop RG effects from the
effective two-Higgs Doublet Model (2HDM) scale M_H+ to the scale M_S. We
illustrate the possibility of non-decoupling CP-violating effects in the heavy
Higgs sector using new benchmark scenarios named CPX4LHC.Comment: 39 pages, 17 figures, LaTeX, typos correcte
Scalar scattering via conformal higher spin exchange

Theories containing infinite number of higher spin fields require a
particular definition of summation over spins consistent with their underlying
symmetries. We consider a model of massless scalars interacting (via bilinear
conserved currents) with conformal higher spin fields in flat space. We compute
the tree-level four-scalar scattering amplitude using a natural prescription
for summation over an infinite set of conformal higher spin exchanges and find
that it vanishes (modulo delta-function terms having support on measure-zero
domain in phase space). Independently, we show that this vanishing of the
scalar scattering amplitude is, in fact, implied by the global conformal higher
spin symmetry of this model. We also discuss one-loop corrections to the
four-scalar scattering amplitude.Comment: 29 pages, 11 figures; v3: minor correction
Quark production in heavy ion collisions I. Formalism and boost
  invariant fermionic light-cone mode functions

We revisit the problem of quark production in high energy heavy ion
collisions, at leading order in $\alpha_s$ in the color glass condensate
framework. In this first paper, we setup the formalism and express the quark
spectrum in terms of a set of mode functions of the Dirac equation. We
determine analytically their initial value in the Fock-Schwinger gauge on a
proper time surface $Q_s\tau_0\ll 1$, in a basis which makes manifest the boost
invariance properties of this problem. We also describe a statistical algorithm
to perform the sampling of the mode functions.Comment: 40 pages, 3 figures, alternate derivation in the new appendix
Large-Field Inflation with Multiple Axions and the Weak Gravity
  Conjecture

In this note, we discuss the implications of the weak gravity conjecture
(WGC) for general models of large-field inflation with a large number of axions
$N$. We first show that, from the bottom-up perspective, such models admit a
variety of different regimes for the enhancement of the effective axion decay
constant, depending on the amount of alignment and the number of instanton
terms that contribute to the scalar potential. This includes regimes of no
enhancement, power-law enhancement and exponential enhancement with respect to
$N$. As special cases, we recover the Pythagorean enhancement of $N$-flation,
the $N$ and $N^{3/2}$ enhancements derived by Bachlechner, Long and McAllister
and the exponential enhancement by Choi, Kim and Yun. We then analyze which
top-down constraints are put on such models from the requirement of consistency
with quantum gravity. In particular, the WGC appears to imply that the
enhancement of the effective axion decay constant must not grow parametrically
with $N$ for $N \gg 1$. On the other hand, recent works proposed that axions
might be able to violate this bound under certain circumstances. Our general
expression for the enhancement allows us to translate this possibility into a
condition on the number of instantons that couple to the axions. We argue that,
at large $N$, models consistent with quantum gravity must either allow
super-Planckian field excursions or have an enormous, possibly even
exponentially large, number of dominant instanton terms in the scalar
potential.Comment: 30+8 pages, 13 figures, 1 table. v2: several remarks and references
  added, version to appear in JHE
Using sorted invariant mass variables to evade combinatorial ambiguities
  in cascade decays

The classic method for mass determination in a SUSY-like cascade decay chain
relies on measurements of the kinematic endpoints in the invariant mass
distributions of suitable collections of visible decay products. However, the
procedure is complicated by combinatorial ambiguities: e.g., the visible final
state particles may be indistinguishable (as in the case of QCD jets), or one
may not know the exact order in which they are emitted along the decay chain.
In order to avoid such combinatorial ambiguities, we propose to treat the final
state particles fully democratically and consider the sorted set of the
invariant masses of all possible partitions of the visible particles in the
decay chain. In particular, for a decay to N visible particles, one considers
the sorted sets of all possible n-body invariant mass combinations (2 <= n <=
N) and determines the kinematic endpoint m_(n,r)^max of the distribution of the
r-th largest n-body invariant mass m_(n,r) for each possible value of n and r.
For the classic example of a squark decay in supersymmetry, we provide
analytical formulas for the interpretation of these endpoints in terms of the
underlying physical masses. We point out that these measurements can be used to
determine the structure of the decay topology, e.g., the number and position of
intermediate on-shell resonances.Comment: 41 pages, 26 figure
The prompt atmospheric neutrino flux in the light of LHCb

The recent observation of very high energy cosmic neutrinos by IceCube
heralds the beginning of neutrino astronomy. At these energies, the dominant
background to the astrophysical signal is the flux of `prompt' neutrinos,
arising from the decay of charmed mesons produced by cosmic ray collisions in
the atmosphere. In this work we provide predictions for the prompt atmospheric
neutrino flux in the framework of perturbative QCD, using state-of-the-art
Monte Carlo event generators. Our calculation includes the constraints set by
charm production measurements from the LHCb experiment at 7 TeV, and has been
recently validated with the corresponding 13 TeV data. Our results for the
prompt flux are a factor of about 2 below the previous benchmark calculation,
in general agreement with two other recent estimates, and with an improved
estimate of the uncertainty. This alleviates the existing tension between the
theoretical prediction and IceCube limits, and suggests that a direct direction
of the prompt flux is imminent.Comment: 20 pages, 10 figures; corrected conventional flux in Fig. 6, to
  appear in JHEP. The PrompNuFlux code is available from
  http://promptnuflux.hepforge.org
A study of multi-jet production in association with an electroweak
  vector boson

We consider the production of a single $Z$ or $W$ boson in association with
jets at the LHC. We compute the corresponding cross sections by matching NLO
QCD predictions with the Herwig++ and Pythia8 parton showers, and by merging
all of the underlying matrix elements with up to two light partons at the Born
level. We compare our results with several 7-TeV measurements by the ATLAS and
CMS collaborations, and overall we find a good agreement between theory and
data.Comment: 43 pages, 47 figures. In v2 the two plots of fig. 26 have been
  updated, and the text modified accordingly, following a fix in the relevant
  Rivet analysis. Minor changes in the acknowledgments and affiliations.
  Clarifications and one reference added in v
The anomalous current multiplet in 6D minimal supersymmetry

For supersymmetric gauge theories with eight supercharges in four, five and
six dimensions, a conserved current belongs to the linear multiplet. In the
case of six-dimensional $\cal N=(1,0)$ Poincar\'e supersymmetry, we present a
consistent deformation of the linear multiplet which describes chiral
anomalies. This is achieved by developing a superform formulation for the
deformed linear multiplet. In the abelian case, we compute a nonlocal effective
action generating the gauge anomaly.Comment: 27 pages; V2: published versio
Physical observables from boundary artifacts: scalar glueball in
  Yang-Mills theory

By relating the functional averages of a generic scalar operator in
simulations with Open (O) and Periodic (P) boundary conditions (BCs)
respectively for $SU(3)$ lattice gauge theory, we show that the scalar glueball
mass and the glueball to vacuum matrix element can be extracted very
efficiently from the former. Numerical results are compared with those
extracted from the two point function of the time slice energy density (both
PBC and OBC). The scaling properties of the mass and the matrix element are
studied with the help of Wilson (gradient) flow.Comment: 15 pages, section 2 revised, a figure and an appendix added.
  Conclusions unchanged. To be published in JHE
Constraints on Abelian Extensions of the Standard Model from Two-Loop
  Vacuum Stability and $U(1)_{B-L}$

We present a renormalization group study of the scalar potential in a minimal
$U(1)_{B-L}$ extension of the Standard Model involving one extra heavier Higgs
and three heavy right-handed neutrinos with family universal B-L charge
assignments. We implement a type-I seesaw for the masses of the light neutrinos
of the Standard Model. In particular, compared to a previous study, we perform
a two-loop extension of the evolution, showing that two-loop effects are
essential for the study of the stability of the scalar potential up to the
Planck scale. The analysis includes the contribution of the kinetic mixing
between the two abelian gauge groups, which is radiatively generated by the
evolution, and the one-loop matching conditions at the electroweak scale. By
requiring the stability of the potential up to the Planck mass, significant
constraints on the masses of the heavy neutrinos, on the gauge couplings and
the mixing in the Higgs sector are identified.Comment: Version to be published in JHE
Color Fields on the Light-Shell

We study the classical color radiation from very high energy collisions that
produce colored particles. In the extreme high energy limit, the classical
color fields are confined to a light-shell expanding at $c$ and are associated
with a non-linear $\sigma$-model on the 2D light-shell with specific symmetry
breaking terms. We argue that the quantum version of this picture exhibits
asymptotic freedom and may be a useful starting point for an effective
light-shell theory of the structure between the jets at a very high energy
collider.Comment: 11 pages, no figure
The Leptonic CP Phase from T2(H)K and Muon Decay at Rest

Combining neutrino oscillations at T2K or T2HK with antineutrinos
oscillations from muon decay at rest (DAR) allows a determination of the
leptonic CP-violating phase delta. The degeneracies of this phase with theta13
and theta23 are broken and delta can be reliably distinguished from 180-delta.
We present the sensitivity to delta of T2(H)K together with a muon DAR
experiment using Super-K as a near detector and Hyper-K at the Tochibora site
as a far detector.Comment: 24 pages, 8 figures, v2 Includes CCQE and nu-e elastic background
The kinematical AdS5xS5 Neumann coefficient

For the case of two particles a solution of the string field theory vertex
axioms can be factorized into a standard form factor and a kinematical piece
which includes the dependence on the size of the third string. In this paper we
construct an exact solution of the kinematical axioms for AdS5xS5 which
includes all order wrapping corrections w.r.t. the size of the third string.
This solution is expressed in terms of elliptic Gamma functions and ordinary
elliptic functions. The solution is valid at any coupling and we analyze its
weak coupling, pp-wave and large L limit.Comment: 24 pages, 4 figure
4d/3d reduction of s-confining theories: the role of the "exotic" D
  instantons

In the reduction of 4d dualities to 3d there are non-perturbative effects
arising from monopoles acting as instantons. This mechanism has been reproduced
in string theory by engineering the theories in a IIA brane setup. Nevertheless
there are limiting cases of the 4d dualities where the dual theories are
actually confined phases of the UV gauge theories. In these cases the monopoles
are absent and the mechanism of reduction of the 4d duality has to be modified.
In this paper we investigate such modification in the brane setup. The main
observation behind our analysis is that in the 4d case the superpotential of
the confined theories can been obtained also as the "exotic" contribution of a
D0 brane, a stringy instanton. When considering these configurations we
reproduce the field theory results in the brane setup. We study both the
unitary and the symplectic case. As a further check we study the reduction of
the 4d superconformal index to the 3d partition function for these theories.Comment: 16 pages, 2 figures, references adde
Sharpening the Weak Gravity Conjecture with Dimensional Reduction

We investigate the behavior of the Weak Gravity Conjecture (WGC) under
toroidal compactification and RG flows, finding evidence that WGC bounds for
single photons become weaker in the infrared. By contrast, we find that a
photon satisfying the WGC will not necessarily satisfy it after toroidal
compactification when black holes charged under the Kaluza-Klein photons are
considered. Doing so either requires an infinite number of states of different
charges to satisfy the WGC in the original theory or a restriction on allowed
compactification radii. These subtleties suggest that if the Weak Gravity
Conjecture is true, we must seek a stronger form of the conjecture that is
robust under compactification. We propose a "Lattice Weak Gravity Conjecture"
that meets this requirement: a superextremal particle should exist for every
charge in the charge lattice. The perturbative heterotic string satisfies this
conjecture. We also use compactification to explore the extent to which the WGC
applies to axions. We argue that gravitational instanton solutions in theories
of axions coupled to dilaton-like fields are analogous to extremal black holes,
motivating a WGC for axions. This is further supported by a match between the
instanton action and that of wrapped black branes in a higher-dimensional UV
completion.Comment: v2: JHEP published version (plus corrected typo
Electroweak top-quark pair production at the LHC with $Z'$ bosons to NLO
  QCD in POWHEG

We present the calculation of the NLO QCD corrections to the electroweak
production of top-antitop pairs at the CERN LHC in the presence of a new
neutral gauge boson. The corrections are implemented in the parton shower Monte
Carlo program POWHEG. Standard Model (SM) and new physics interference effects
are properly taken into account. QED singularities, first appearing at this
order, are consistently subtracted. Numerical results are presented for SM and
$Z'$ total cross sections and distributions in invariant mass, transverse
momentum, azimuthal angle and rapidity of the top-quark pair. The remaining
theoretical uncertainty from scale and PDF variations is estimated, and the
potential of the charge asymmetry to distinguish between new physics models is
investigated for the Sequential SM and a leptophobic topcolor model.Comment: 33 pages, 15 figures, 1 table. Discussion added on uncertainties from
  parton showers and NLL contribution
Hard Diffraction with Dynamic Gap Survival

We present a new framework for the modelling of hard diffraction in pp and
ppbar collisions. It starts from the the approach pioneered by Ingelman and
Schlein, wherein the single diffractive cross section is factorized into a
Pomeron flux and a Pomeron PDF. To this it adds a dynamically calculated
rapidity gap survival factor, derived from the modelling of multiparton
interactions. This factor is not relevant for diffraction in ep collisions,
giving non-universality between HERA and Tevatron diffractive event rates. The
model has been implemented in Pythia 8 and provides a complete description of
the hadronic state associated with any hard single diffractive process.
Comparisons with ppbar and pp data reveal improvement in the description of
single diffractive events.Comment: 30 pages, 13 figures. Replaced with published versio
Conformal Collider Physics from the Lightcone Bootstrap

We analytically study the lightcone limit of the conformal bootstrap
equations for 4-point functions containing global symmetry currents and the
stress tensor in 3d CFTs. We show that the contribution of the stress tensor to
the anomalous dimensions of large spin double-twist states is negative if and
only if the conformal collider physics bounds are satisfied. In the context of
AdS/CFT these results indicate a relation between the attractiveness of AdS
gravity and positivity of the CFT energy flux. We also study the contribution
of non-Abelian conserved currents to the anomalous dimensions of double-twist
operators, corresponding to the gauge binding energy of 2-particle states in
AdS. We show that the representation of the double-twist state determines the
sign of the gauge binding energy if and only if the coefficient appearing in
the current 3-point function satisfies a similar bound, which is equivalent to
an upper bound on the charge flux asymmetry of the CFT.Comment: 56 pages, 1 tabl
Exploring the new phase transition of CDT

This work focuses on the newly discovered bifurcation phase transition of CDT
quantum gravity. We define various order parameters and investigate which is
most suitable to study this transition in numerical simulations. By analyzing
the behaviour of the order parameters we present evidence that the transition
separating the bifurcation phase and the physical phase of CDT is likely a
second or higher-order transition, a result that may have important
implications for the continuum limit of CDT.Comment: 11 pages, 8 figure
Heavy to light Higgs boson decays at NLO in the Singlet Extension of the
  Standard Model

We study the decay of a heavy Higgs boson into a light Higgs pair at one loop
in the singlet extension of the Standard Model. To this purpose, we construct
several renormalization schemes for the extended Higgs sector of the model. We
apply these schemes to calculate the heavy-to-light Higgs decay width at
next-to-leading order electroweak accuracy, and demonstrate that certain
prescriptions lead to gauge-dependent results. We comprehensively examine how
the NLO predictions depend on the relevant singlet model parameters, with
emphasis on the trademark behavior of the quantum effects, and how these change
under different renormalization schemes and a variable renormalization scale.
Once all present constraints on the model are included, we find mild NLO
corrections, typically of few percent, and with small theoretical
uncertainties.Comment: 35 pages (plus appendix and references), 11 Figures, 10 Tables. V2:
  minor changes updated, matching the published journal versio
Non-Abelian Binding Energies from the Lightcone Bootstrap

We analytically study the lightcone limit of the conformal bootstrap for
4-point functions containing scalars charged under global symmetries. We show
the existence of large spin double-twist operators in various representations
of the global symmetry group. We then compute their anomalous dimensions in
terms of the central charge $C_T$, current central charge $C_J$, and the OPE
coefficients of low dimension scalars. In AdS, these results correspond to the
binding energy of two-particle states arising from the exchange of gravitons,
gauge bosons, and light scalar fields. Using unitarity and crossing symmetry,
we show that gravity is universal and attractive among different types of
two-particle states, while the gauge binding energy can have either sign as
determined by the representation of the two-particle state, with universal
ratios fixed by the symmetry group. We apply our results to 4D $\mathcal{N}=1$
SQCD and the 3D O(N) vector models. We also show that in a unitary CFT, if the
current central charge $C_J$ stays finite when the global symmetry group
becomes infinitely large, such as the $N\rightarrow\infty$ limit of the O(N)
vector model, then the theory must contain an infinite number of higher spin
currents.Comment: Added comments on the weak gravity conjectur
Black rings at large D

We study the effective theory of slowly rotating black holes at the infinite
limit of the spacetime dimension D. This large D effective theory is obtained
by integrating the Einstein equation with respect to the radial direction. The
effective theory gives equations for non-linear dynamical deformations of the
slowly rotating black hole as effective equations. The effective equations
contain the slowly rotating Myers-Perry black hole, slowly boosted black
string, non-uniform black string and black ring as stationary solutions. We
obtain an analytic solution of the black ring by solving the effective
equations. Furthermore, by perturbation analysis of the effective equations, we
find a quasinormal mode condition of the black ring in analytic way. As a
result we confirm that thin black ring is unstable against non-axisymmetric
perturbations. We also include 1/D corrections to the effective equations and
discuss the effects by 1/D corrections.Comment: 43 pages, 5 figures, published version in JHE
Phenomenology of a 750 GeV Singlet

We study the recently reported excess in the diphoton resonance search by
ATLAS and CMS. We investigate the available parameter space in the combined
run-1 and run-2 diphoton data and study its interpretation in terms of a
singlet scalar field which possibly mixes with the Standard Model Higgs boson.
We show that the mixing angle is already strongly constrained by high-mass
Higgs searches in the diboson channel, and by Higgs coupling measurements.
While a broad resonance is slightly favored, we argue that the signal is
consistent with a narrow-width singlet which couples to colored and
electromagnetically-charged vector-like fermions. Dijet signals are predicted
and may be visible in upcoming analyses. Allowing for additional decay modes
could explain a broader resonance, however, we show that monojet searches
disfavor a large invisible width. Finally, we comment on the possible relation
of this scenario to the naturalness problem.Comment: 21 pages; v2: references added, figures smoothed out, added
  discussion of Z-gamma and ZZ; v3: replaced to match JHEP 1602 (2016) 15