
Transverse momentum dependent distributions with jets. (arXiv:1807.07573v1 [hepph])
Authors: Daniel GutierrezReyes, Ignazio Scimemi, Wouter J. Waalewijn, Lorenzo Zoppi
We investigate the use of jets to measure transverse momentum dependent
distributions (TMDs). The example we use to present our framework is the dijet
momentum decorrelation at lepton colliders. Translating this momentum
decorrelation into an angle $\theta \ll 1$, we analyze the factorization of the
cross section for the cases $\theta \gg R$, $\theta \sim R$ and $\theta \ll R$,
where $R$ is the jet radius. Critically, for the WinnerTakeAll axis, the jet
TMD has the same doublescale renormalization group evolution as TMD
fragmentation functions for all radii $R$. TMD fragmentation functions in
factorization theorems may then simply be replaced by the jet TMDs we
calculate, and all ingredients to perform the resummation to
nexttonexttoleading logarithmic accuracy are available. Our approach also
applies to semiinclusive deep inelastic scattering (SIDIS), where a jet
instead of a hadron is measured in the final state, and we find a clean method
to probe the intrinsic transverse momentum of quarks and gluons in the proton
that is less sensitive to finalstate nonperturbative effects.

Unrestored Electroweak Symmetry. (arXiv:1807.07578v1 [hepph])
Authors: Patrick Meade, Harikrishnan Ramani
The commonly assumed cosmological history of our universe is that at
earlytimes and hightemperatures the universe went through an ElectroWeak
Phase Transition (EWPT). Assuming an EWPT, and depending on its strength, there
are many implications for baryogenesis, gravitational waves, and the evolution
of the universe in general. However, it is not true that all spontaneously
broken symmetries at zerotemperature are restored at hightemperature. In
particular the idea of "inverse symmetry breaking" has long been established in
scalar theories with evidence from both perturbative and lattice calculations.
In this letter we demonstrate that with a simple extension of the SM it is
possible that the ElectroWeak (EW) symmetry was always broken or only
temporarily passed through a symmetry restored phase. These novel phase
histories have many cosmological and collider implications that we discuss. The
model presented here serves as a useful benchmark comparison for future
attempts to discern the phase of our universe at $T\gtrsim$ a few GeV.

The Ultraviolet Landscape of TwoHiggs Doublet Models. (arXiv:1807.07581v1 [hepph])
Authors: Manuel E. Krauss, Toby Opferkuch, Florian Staub
We study the predictions of generic ultraviolet completions of twoHiggs
doublet models. We assume that at the matching scale between the twoHiggs
doublet model and a ultraviolet complete theory  which can be anywhere
between the TeV and the Planck scale  arbitrary but perturbative values for
the quartic couplings are present. We evaluate the couplings down from the
matching scale to the weak scale and study the predictions for the scalar mass
spectrum. In particular, we show the importance of radiative corrections which
are essential for both an accurate Higgs mass calculation as well as
determining the stability of the electroweak vacuum. We study the relation
between the mass splitting of the heavy Higgs states and the size of the
quartic couplings at the matching scale, finding that only a small class of
models exhibit a sizeable mass splitting between the heavy scalars at the weak
scale. Moreover, we find a clear correlation between the maximal size of the
couplings and the considered matching scale.

The Apparent (Gravitational) Horizon in Cosmology. (arXiv:1807.07587v1 [grqc])
Authors: Fulvio Melia
In general relativity, a gravitational horizon (more commonly known as the
"apparent horizon") is an imaginary surface beyond which all null geodesics
recede from the observer. The Universe has an apparent (gravitational) horizon,
but unlike its counterpart in the Schwarzschild and Kerr metrics, it is not
static. It may eventually turn into an event horizonan asymptotically
defined membrane that forever separates causally connected events from those
that are notdepending on the equation of state of the cosmic fluid. In this
paper, we examine how and why an apparent (gravitational) horizon is manifested
in the FriedmannRobertsonWalker metric, and why it is becoming so pivotal to
our correct interpretation of the cosmological data. We discuss its
observational signature and demonstrate how it alone defines the proper size of
our visible Universe. In so doing, we affirm its physical reality and its
impact on cosmological models.

Hydrodynamic modes in magnetized chiral plasma with vorticity. (arXiv:1807.07608v1 [hepth])
Authors: D. O. Rybalka, E. V. Gorbar, I. A. Shovkovy
By making use of a covariant formulation of the chiral kinetic theory in the
relaxationtime approximation, we derive the firstorder dissipative
hydrodynamics equations for a uniformly rotating chiral plasma in a magnetic
field. We identify the global equilibrium state for the corresponding chiral
plasma confined to a cylindrical region with realistic boundary conditions.
Then, by using linearized hydrodynamic equations, supplemented by the Maxwell
equations, we study hydrodynamic modes of the chiral plasma in the regimes of
high temperature and high density. We find that nonzero vorticity has profound
effects on both the global equilibrium state of the plasma and the spectrum of
its hydrodynamic modes. Possible applications of the main results are briefly
discussed.

Chiral symmetrybreaking schemes and dynamical generation of masses and field mixing. (arXiv:1807.07616v1 [hepth])
Authors: Massimo Blasone, Petr Jizba, Nikolaos E. Mavromatos, Luca Smaldone
In this Letter we study dynamical chiral symmetry breaking of a generic model
with global chiral symmetry. By purely algebraic means we analyze the vacuum
structure for different symmetry breaking patterns and show explicitly how non
trivial vacuum condensates are required for both mass generation and field
mixing phenomena. We stress that the generation of mixing implies the presence
of off diagonal condensates in flavor space. In addition, with the help of Ward
Takahashi identities, we demonstrate the emergence of Nambu Goldstone modes in
the physical spectrum.

Border and skewness functions from a leading order fit to DVCS data. (arXiv:1807.07620v1 [hepph])
Authors: H. Moutarde, P. Sznajder, J. Wagner
We propose new parameterizations for the border and skewness functions
appearing in the description of 3D nucleon structure in the language of
Generalized Parton Distributions (GPDs). These parameterizations are
constructed in a way to fulfill the basic properties of GPDs, like their
reduction to Parton Density Functions and Elastic Form Factors. They also rely
on the power behavior of GPDs in the $x \to 1$ limit and the propounded
analyticity property of Mellin moments of GPDs. We evaluate Compton Form
Factors (CFFs), the subamplitudes of the Deeply Virtual Compton Scattering
(DVCS) process, at the leading order and leading twist accuracy. We constrain
the restricted number of free parameters of these new parameterizations in a
global CFF analysis of almost all existing proton DVCS measurements. The fit is
performed within the PARTONS framework, being the modern tool for generic GPD
studies. A distinctive feature of this CFF fit is the careful propagation of
uncertainties based on the replica method. The fit results genuinely permit
nucleon tomography and may give some insight into the distribution of forces
acting on partons.

Efficient Probabilistic Inference in the Quest for Physics Beyond the Standard Model. (arXiv:1807.07706v1 [cs.LG])
Authors: Atilim Gunes Baydin, Lukas Heinrich, Wahid Bhimji, Bradley GramHansen, Gilles Louppe, Lei Shao, Prabhat, Kyle Cranmer, Frank Wood
We present a novel framework that enables efficient probabilistic inference
in largescale scientific models by allowing the execution of existing
domainspecific simulators as probabilistic programs, resulting in highly
interpretable posterior inference. Our framework is general purpose and
scalable, and is based on a crossplatform probabilistic execution protocol
through which an inference engine can control simulators in a languageagnostic
way. We demonstrate the technique in particle physics, on a scientifically
accurate simulation of the tau lepton decay, which is a key ingredient in
establishing the properties of the Higgs boson. Highenergy physics has a rich
set of simulators based on quantum field theory and the interaction of
particles in matter. We show how to use probabilistic programming to perform
Bayesian inference in these existing simulator codebases directly, in
particular conditioning on observable outputs from a simulated particle
detector to directly produce an interpretable posterior distribution over decay
pathways. Inference efficiency is achieved via inference compilation where a
deep recurrent neural network is trained to parameterize proposal distributions
and control the stochastic simulator in a sequential importance sampling
scheme, at a fraction of the computational cost of Markov chain Monte Carlo
sampling.

Searching for heavy Higgs bosons in the $t \bar t Z$ and $t b W$ final states. (arXiv:1807.07734v1 [hepph])
Authors: Ulrich Haisch, Giacomo Polesello
In the context of twoHiggs doublet models, we explore the possibility of
searching for heavy Higgs bosons in the $t \bar t Z$ and $t bW$ final states.
We develop realistic analyses strategies and in the case of the $t \bar t Z$
channel provide a detailed evaluation of the newphysics reach at the 14 TeV
LHC. We find that already with an integrated luminosity of $300 \, {\rm
fb}^{1}$ searches for the $t \bar t Z$ signature can provide statistically
significant constraints at low values of $\tan \beta$ for heavy Higgs masses in
the range from around $450 \, {\rm GeV}$ to $1150 \, {\rm GeV}$. Future
searches for heavy Higgses in the $tbW$ final state are also expected to be
able to probe parts of this parameter space, though the precise constraints
turn out to depend sensitively on the assumed systematics on the shape of the
$t \bar t$ background.

Electromagnetic interactions of mesons induced by the axialvector  pseudoscalar mixings. (arXiv:1807.07742v1 [hepph])
Authors: A.A. Osipov, M.M. Khalifa
It is shown that the diagonalization of the axialvector  pseudoscalar
transitions in the effective meson Lagrangian in presence of electromagnetic
interactions leads to a deviation from the vector meson dominance picture which
usually arises in the Nambu  JonaLasinio model. The essential features of
such modification of the theory are studied. Some important examples are
considered in detail.

Validation of the Simulation of Collision Events at the LHC. (arXiv:1807.07756v1 [physics.histph])
Authors: Peter Mättig
The procedures of validating simulation of particle physics events at the LHC
are summarized. Because of the strongly fluctuating particle content of LHC
events and detector interactions, particle based Monte Carlo methods are an
indispensable tool for data analysis. Simulation in particle physics is founded
on factorization and thus its global validation can be realized by validating
each individual step in the simulation. This can be accomplished by adopting
results of previous measurements, in  situ studies and models. Important in
particle physics is to quantify how well simulation is validated such that a
systematic uncertainty can be assigned to a measurement. The simulation is
tested for a wide range of processes and agrees with data within the assigned
uncertainties.

A simultaneous understanding of jet and hadron suppression. (arXiv:1807.07788v1 [hepph])
Authors: Jorge CasalderreySolana, Zachary Hulcher, Guilherme Milhano, Daniel Pablos, Krishna Rajagopal
In the context of the hybrid strong/weak coupling model for jet quenching, we
perform a global fit to hadron and jet data in the most central bins both at
RHIC and LHC. The qualitative and quantitative success of the analysis is
attributed to the fact that the model correctly captures the fact that wider
jets lose, on average, more energy than the narrower ones, to which high energy
hadrons belong. We show how one can understand the relative jet and hadron
suppression by analyzing the jet fragmentation functions, and also discuss the
role of plasma finite resolution effects.

Decoherence in neutrino oscillations: neutrino nature and CPT violation. (arXiv:1807.07823v1 [hepph])
Authors: A. Capolupo, S. M. Giampaolo, G. Lambiase
We study the phenomenon of the decoherence for neutrinos propagating in long
baseline experiments. We show that, the presence of an offdiagonal term in the
dissipative matrix induces oscillation formulas for Dirac neutrinos different
from the ones for Majorana neutrinos. The decoherence leads also to the
violation of the $CPT$ symmetry. We use the values of the experimental
parameters in order to relate our theoretical proposal with experiments.

Ad Lucem: The Photon in the MMHT PDFs. (arXiv:1807.07846v1 [hepph])
Authors: Ricky Nathvani, Lucian HarlandLang, Robert Thorne, Alan Martin
We describe the inclusion of the photon as an additional component of the
proton's Parton Distribution Functions (PDFs) in the MMHT framework. The input
for the photon is adopted from the recent LUXqed determination. We describe the
similarities and differences above the input scale with other photon PDF
determinations and the contributions to the MMHT photon from both leading twist
and higher twist contributions, and their uncertainties. We study the impact of
QED effects on the quark and gluon PDFs and the fit quality, and outline our
development of an equivalent set of neutron PDFs.

Twomass threeloop effects in deepinelastic scattering. (arXiv:1807.07855v1 [hepph])
Authors: J. Ablinger, J. Blümlein, A. De Freitas, A. Goedicke, C. Schneider, K. Schönwald
We report on recent results on the twomass corrections for massive operator
matrix elements at 2 and 3loop orders in QCD. These corrections form the
building blocks of the variable flavor number scheme. Due to the similar values
of the charm and bottom quark masses the twomass corrections form an important
contribution.

Geometrically Confined Thermal Field Theory: Finite Size Corrections and Phase Transitions. (arXiv:1807.07871v1 [hepth])
Authors: Sylvain Mogliacci, Isobel Kolbé, W. A. Horowitz
Motivated by the recent shocking results from RHIC and LHC that show
quarkgluon plasma signatures in small systems, we study a simple model of a
massless, noninteracting scalar field confined with Dirichlet boundary
conditions. We use this system to investigate the finite size corrections to
thermal field theoretically derived quantities compared to the usual
StefanBoltzmann limit of an ideal gas not confined in any direction. Two
equivalent expressions with different numerical convergence properties are
found for the free energy in $D$ rectilinear spacetime dimensions with $c\le
D1$ spatial dimensions of finite extent. We find that the First Law of
Thermodynamics generalizes such that the pressure depends on direction but that
the Third Law is respected. For systems with finite dimension(s) but infinite
volumes, such as a field constrained between two parallel plates or a
rectangular tube, the relative fluctuations in energy are zero, and hence the
canonical and microcanonical ensembles are equivalent. We present precise
numerical results for the free energy, total internal energy, pressure,
entropy, and heat capacity of our field between parallel plates, in a tube, and
in finite volume boxes of various sizes in 4 spacetime dimensions. For
temperatures and system sizes relevant for heavy ion phenomenology, we find
large deviations from the StefanBoltzmann limit for these quantities,
especially for the pressure. Further investigation of an isolated system of
fields constrained between parallel plates reveals a divergent isoenergetic
compressibility at a critical length $L_c\sim1/T$. We have thus discovered a
new second order phase transition via a first principles calculation, a
transition that is driven by the size of the system.

Neutron lifetime puzzle and neutron  mirror neutron oscillation. (arXiv:1807.07906v1 [hepph])
Authors: Zurab Berezhiani
The discrepancy between the neutron lifetimes measured in the beam and trap
experiments can be explained via the neutron $n$ conversion into mirror neutron
$n'$, its dark partner from parallel mirror sector, provided that $n$ and $n'$
have a tiny mass splitting order $10^{7}$ eV. In large magnetic fields used in
beam experiments $nn'$ transition is resonantly enhanced and can transform of
about a per cent fraction of neutrons into mirror neutrons which decay in
invisible mode. Thus less protons will be produced and the measured value
$\tau_{\rm beam}$ appears larger than $\beta$decay time $\tau_{\beta} =
\tau_{\rm trap}$. Some phenomenological and astrophysical consequences of this
scenario are also briefly discussed.

NNLO corrections to VBF Higgs boson production. (arXiv:1807.07908v1 [hepph])
Authors: Juan CruzMartinez, Nigel Glover, Thomas Gehrmann, Alexander Huss
This talk expands on recently published results for the factorising
nexttonexttoleading order (NNLO) QCD corrections to Higgs boson production
in the vector boson fusion (VBF) channel. The calculation is fully differential
in the kinematics of the Higgs boson and the final state jets and is
implemented in the NNLOJET framework for computing higherorder QCD
corrections. We find the NNLO corrections to be limited in magnitude to about
$\pm 5$\% with a weak kinematical dependence in the transverse momenta and
rapidity separation of the two tagging jets.

Anomalyfree Dark Matter with Harmless Direct Detection Constraints. (arXiv:1807.07921v1 [hepph])
Authors: S. Caron, J. A. Casas, J. Quilis, R. Ruiz de Austri
Dark matter (DM) interacting with the SM fields via a $Z'$boson
('$Z'$portal') remains one of the most attractive WIMP scenarios, both from
the theoretical and the phenomenological points of view. In order to avoid the
strong constraints from direct detection and dilepton production, it is highly
convenient that the $Z'$ has axial coupling to DM and leptophobic couplings to
the SM particles, respectively. In this paper we first explore the conditions
for an anomalyfree leptophobic $Z'$, which (if flavourblind) has to coincide
with that from gauged baryonnumber in the SM sector. Then there are very few
possibilities where, besides leptophobia, the coupling to DM is axial; namely
four (quite similar) cases if the content of the dark sector is minimal. The
resulting scenario is very predictive, and perfectly viable from the present
constraints from DM detection, EW observables and LHC data (dilepton, dijet
and monojet production). We analyze all these constraints, obtaining the
allowed areas in the parameter space, which generically prefer $m_{Z'}\lesssim
500$ GeV, apart from resonant regions. The best chances to test these viable
areas come from future LHC measurements.

Sterile Neutrino Dark Matter. (arXiv:1807.07938v1 [hepph])
Authors: A. Boyarsky, M. Drewes, T. Lasserre, S. Mertens, O. Ruchayskiy
We review sterile neutrinos as possible Dark Matter candidates. After a short
summary on the role of neutrinos in cosmology and particle physics, we give a
comprehensive overview of the current status of the research on sterile
neutrino Dark Matter. First we discuss the motivation and limits obtained
through astrophysical observations. Second, we review different mechanisms of
how sterile neutrino Dark Matter could have been produced in the early
universe. Finally, we outline a selection of future laboratory searches for
keVscale sterile neutrinos, highlighting their experimental challenges and
discovery potential.

On Bulk Viscosity at Weak and Strong 't Hooft Couplings. (arXiv:1807.07950v1 [hepth])
Authors: Alina Czajka, Keshav Dasgupta, Charles Gale, Sangyong Jeon, Aalok Misra, Michael Richard, Karunava Sil
Bulk viscosity is an important transport coefficient that exists in the
hydrodynamical limit only when the underlying theory is nonconformal. One
example being thermal QCD with large number of colors. We study bulk viscosity
in such a theory at low energies and at weak and strong 't Hooft couplings when
the temperature is above the deconfinement temperature. The weak coupling
analysis is based on Boltzmann equation from kinetic theory whereas the strong
coupling analysis uses nonconformal holographic techniques from string and
Mtheories. Using these, many properties associated with bulk viscosity may be
explicitly derived. This is a shortened companion paper that summarizes some of
the results of our longer paper arXiv:1807.04713.

Topology in full QCD at high temperature: a multicanonical approach. (arXiv:1807.07954v1 [heplat])
Authors: Claudio Bonati, Massimo D'Elia, Guido Martinelli, Francesco Negro, Francesco Sanfilippo, Antonino Todaro
We investigate the topological properties of $N_f = 2+1$ QCD with physical
quark masses, at temperatures around 500 MeV. With the aim of obtaining a
reliable sampling of topological modes in a regime where the fluctuations of
the topological charge $Q$ are very rare, we adopt a multicanonical approach,
adding a bias potential to the action which enhances the probability of
suppressed topological sectors. This method permits to gain up to three orders
magnitude in computational power in the explored temperature regime. Results at
different lattice spacings and physical spatial volumes reveal no significant
finite size effects and the presence, instead, of large finite cutoff effects,
with the topological susceptibility which decreases by 34 orders of magnitude
while moving from $a \simeq 0.06$ fm towards the continuum limit. The continuum
extrapolation is in agreeement with previous lattice determinations, obtained
by using ansatzes justified by several theoretical arguments. The parameter
$b_2$, related to the fourth order coefficient in the Taylor expansion of the
free energy density $f(\theta)$, has instead a smooth continuum extrapolation
which is in agreement with the dilute instanton gas approximation.

The origin of fermion families and the value of the fine structure constant. (arXiv:1307.2201v3 [physics.genph] UPDATED)
Authors: J. Lemmon
This paper is concerned with a way of thinking about the standard model that
explains the existence of three fermion families and the value of the fine
structure constant. The main idea is that the ultraviolet divergences that we
encounter in the quantum field theories of the standard model, when interpreted
appropriately, have a deep physical significance that leads to new
relationships between the physical and bare masses quarks and leptons. This
interpretation is based on the assumption of a quantum gravity induced
ultraviolet cutoff at the Planck scale and a novel approach to mass
renormalization in which the usual perturbation series for the selfmass of a
quark or lepton is rearranged and formally summed. Perturbing around the
formally summed expression leads to selfconsistency equations for the physical
quark and lepton masses with multiple solutions that lie outside the reach of
conventional perturbation theory. When applied to the standard model at the
lowest level of approximation, this approach explains how three generations of
charged leptons with a mass spectrum and a value of the fine structure constant
in rough agreement with experiment can emerge from a universal bare mass and
bare electromagnetic charge. This approach also explains how three generations
of physical quark doublets (six flavors) can emerge from a universal bare
doublet and bare color charge. Finally, it explains the origin of mixing (and
CP violation) and the absence of flavorchanging neutral currents.

QCD running in neutrinoless double beta decay: Shortrange mechanisms. (arXiv:1511.03945v2 [hepph] UPDATED)
Authors: M. González, M. Hirsch, S.G. Kovalenko
The decay rate of neutrinoless double beta ($0\nu\beta\beta$) decay contains
terms from heavy particle exchange, which lead to dimension9 (d=9) six fermion
operators at low energies. Limits on the coefficients of these operators have
been derived previously neglecting the running of the operators between the
highscale, where they are generated, and the energy scale of double beta
decay, where they are measured. Here we calculate the leading order QCD
corrections to all possible d=9 operators contributing to the $0\nu\beta\beta$
amplitude and use RGE running to calculate 1loop improved limits. Numerically,
QCD running changes limits by factors of the order of or larger than typical
uncertainties in nuclear matrix element calculations. For some specific cases,
operator mixing in the running changes limits even by up to two orders of
magnitude. Our results can be straightforwardly combined with new experimental
limits or improved nuclear matrix element calculations to rederive updated
limits on all shortrange contributions to $0\nu\beta\beta$ decay.

First results from the DEAP3600 dark matter search with argon at SNOLAB. (arXiv:1707.08042v3 [astroph.CO] UPDATED)
Authors: DEAP3600 Collaboration: P.A. Amaudruz, M. Baldwin, M. Batygov, B. Beltran, C. E. Bina, D. Bishop, J. Bonatt, G. Boorman, M. G. Boulay, B. Broerman, T. Bromwich, J. F. Bueno, A. Butcher, B. Cai, S. Chan, M. Chen, R. Chouinard, B. T. Cleveland, D. Cranshaw, K. Dering, J. DiGioseffo, S. Dittmeier, F. A. Duncan, M. Dunford, A. Erlandson, N. Fatemighomi, S. Florian, A. Flower, R. J. Ford, R. Gagnon, P. Giampa, V. V. Golovko, P. Gorel, R. Gornea, E. Grace, K. Graham, D. R. Grant, E. Gulyev, R. Hakobyan, A. Hall, A. L. Hallin, M. Hamstra, P. J. Harvey, C. Hearns, C. J. Jillings, O. Kamaev, A. Kemp, M. Kuźniak, S. Langrock, F. La Zia, B. Lehnert, J. J. Lidgard, C. Lim, T. Lindner, Y. Linn, S. Liu, P. Majewski, R. Mathew, A. B. McDonald, T. McElroy, T. McGinn, J. B. McLaughlin, S. Mead, R. Mehdiyev, et al. (40 additional authors not shown)
This paper reports the first results of a direct dark matter search with the
DEAP3600 singlephase liquid argon (LAr) detector. The experiment was
performed 2 km underground at SNOLAB (Sudbury, Canada) utilizing a large target
mass, with the LAr target contained in a spherical acrylic vessel of 3600 kg
capacity. The LAr is viewed by an array of PMTs, which would register
scintillation light produced by rare nuclear recoil signals induced by dark
matter particle scattering. An analysis of 4.44 live days (fiducial exposure of
9.87 tonnedays) of data taken with the nearly full detector during the initial
filling phase demonstrates the detector performance and the best electronic
recoil rejection using pulseshape discrimination in argon, with leakage
$<1.2\times 10^{7}$ (90% C.L.) between 16 and 33 keV$_{ee}$. No candidate
signal events are observed, which results in the leading limit on WIMPnucleon
spinindependent cross section on argon, $<1.2\times 10^{44}$ cm$^2$ for a 100
GeV/c$^2$ WIMP mass (90% C.L.).

Impact of medium modification of the nucleon weak and electromagnetic form factors on the neutrino mean free path in dense matter. (arXiv:1802.01749v2 [nuclth] UPDATED)
Authors: Parada T. P. Hutauruk, Yongseok Oh, K. Tsushima
Impact of the inmedium modified nucleon weak and electromagnetic form
factors on the neutrino mean free path in dense matter is studied by
considering both the weak and electromagnetic interactions of neutrinos with
the constituents of the matter. A relativistic mean field model and the
quarkmeson coupling model are respectively adopted for the inmedium effective
nucleon mass and nucleon form factors. We find that the cross sections of
neutrino scattering in cold nuclear medium decreases when the inmedium
modification of the nucleon weak and electromagnetic form factors are taken
into account. This reduction results in the enhancement of the neutrino mean
free path, in particular at the baryon density of around a few times of the
normal nuclear matter density. The enhancement of the neutrino mean free path
is estimated to be about 1040\% compared with the values obtained without the
medium modification of the nucleon form factors, and the enhancement is
expected to accelerate the cooling of neutron stars.

Targetnormal singlespin asymmetry in elastic electronnucleon scattering. (arXiv:1803.04004v2 [hepph] UPDATED)
Authors: Oleksandr Koshchii, Andrei Afanasev
We estimate the targetnormal singlespin asymmetry at nearly forward angles
in elastic electronnucleon scattering. In the leadingorder approximation,
this asymmetry is proportional to the imaginary part of the twophoton exchange
(TPE) amplitude, which can be expressed as an integral over the doubly virtual
Compton scattering (VVCS) tensor. We develop a model that parameterizes VVCS
tensor for the case of nearly forward scattering angles. Our parameterization
ensures a proper normalization of the imaginary part of the TPE amplitude on
the wellknown forward limit expression, which is given in terms of nucleon
structure functions measurable in inelastic electronnucleon scattering
experiments. We discuss applicability limits of our theory and provide
targetnormal singlespin asymmetry predictions for both elastic
electronproton and electronneutron scattering.

Addressing the Bphysics anomalies in a fundamental Composite Higgs Model. (arXiv:1803.10972v3 [hepph] UPDATED)
Authors: David Marzocca
I present a model addressing coherently the naturalness problem of the
electroweak scale and the observed pattern of deviations from the Standard
Model in semileptonic decays of $B$ mesons. The Higgs and the two scalar
leptoquarks responsible for the $B$physics anomalies, $S_1 = ({\bf \bar 3},
{\bf 1}, 1/3)$ and $S_3 = ({\bf \bar 3}, {\bf 3}, 1/3)$, arise as pseudo
NambuGoldstone bosons of a new strongly coupled sector at the multiTeV scale.
I focus on an explicit realization of such a dynamics in terms of a new
strongly coupled gauge interaction and extra vectorlike fermions charged under
it. The model presents a very rich phenomenology, ranging from flavour
observables, Higgs and electroweak precision measurements, and direct searches
of new states at the LHC.

Lowenergy limit of the $O(4)$ quarkmeson model from the functional renormalization group approach. (arXiv:1804.01787v2 [hepph] UPDATED)
Authors: Jürgen Eser, Florian Divotgey, Mario Mitter, Dirk H. Rischke
We compute the lowenergy limit of the $O(4)$symmetric quarkmeson model as
an effective field theory for Quantum Chromodynamics within the Functional
Renormalization Group (FRG) approach. In particular, we analyze the
renormalization group flow of momentumdependent pion selfinteractions beyond
the local potential approximation. The numerical results for these couplings
obtained from the FRG are confronted with a recent treelevel study.
Additionally, their effect on the wavefunction renormalization and the
curvature masses is investigated.

Primordial Black Holes from Inflation and Quantum Diffusion. (arXiv:1804.07124v2 [astroph.CO] UPDATED)
Authors: Matteo Biagetti, Gabriele Franciolini, Alex Kehagias, Antonio Riotto
Primordial black holes as dark matter may be generated in singlefield models
of inflation thanks to the enhancement at small scales of the comoving
curvature perturbation. This mechanism requires leaving the slowroll phase to
enter a nonattractor phase during which the inflaton travels across a plateau
and its velocity drops down exponentially. We argue that quantum diffusion has
a significant impact on the primordial black hole mass fraction making the
classical standard prediction not trustable.

Differential decay rates of CPeven and CPodd Higgs bosons to top and bottom quarks at NNLO QCD. (arXiv:1805.06658v2 [hepph] UPDATED)
Authors: Werner Bernreuther, Long Chen, ZongGuo Si
We consider the decay of a neutral Higgs boson of arbitrary CP nature to a
massive quark antiquark pair at nexttonexttoleading order in perturbative
QCD. Our analysis is made at the differential level using the antenna
subtraction framework. We apply our general setup to the decays of a CPeven
and CPodd heavy Higgs boson to a topquark topantiquark pair and to the decay
of the 125 GeV Higgs boson to a massive bottomquark bottomantiquark pair. In
the latter case we calculate, in particular, the twojet, threejet, and
fourjet decay rates and, for twojet events, the energy distribution of the
leading jet.

Reconciling $B$decay anomalies with neutrino masses, dark matter and constraints from flavour violation. (arXiv:1806.10146v2 [hepph] UPDATED)
Authors: Chandan Hati, Girish Kumar, Jean Orloff, Ana M. Teixeira
Motivated by an explanation of the $R_{K^{(*)}}$ anomalies, we propose a
Standard Model extension via two scalar SU(2)$_L$ triplet leptoquarks and three
generations of triplet Majorana fermions. The gauge group is reinforced by a
$Z_2$ symmetry, ensuring the stability of the lightest $Z_2$odd particle,
which is a potentially viable dark matter candidate. Neutrino mass generation
occurs radiatively (at the threeloop level), and leads to important
constraints on the leptoquark couplings to leptons. We consider very generic
textures for the flavour structure of the $h_1$ leptoquark Yukawa couplings,
identifying classes of textures which succeed in saturating the $R_{K^{(*)}}$
anomalies. We subsequently carry a comprehensive analysis of the model's
contributions to numerous highintensity observables such as meson oscillations
and decays, as well as charged lepton flavour violating processes, which put
severe constraints on the flavour structure of these leptoquark extensions. Our
findings suggest that the most constraining observables are $K^+ \to \pi^+ \nu
\bar \nu$ decays, and charged lepton flavour violating $\mu e$ conversion in
nuclei (among others). Nevertheless, for several classes of flavour textures
and for wide mass regimes of the new mediators (within collider reach), this
Standard Model extension successfully addresses neutrino mass generation,
explains the current $R_{K^{(*)}}$ tensions, and offers a viable dark matter
candidate.

A mixing interpolation method to mimic pasta phases in compact star matter. (arXiv:1807.03258v3 [nuclth] UPDATED)
Authors: David AlvarezCastillo, David Blaschke
We present a new method to interpolate between two matter phases that allows
for a description of mixed phases and can be used, e.g., for mimicking
transitions between pasta structures occuring in the crust as well as in the
inner core of compact stars. This interpolation method is based on assuming
switch functions that are used to define a mixture of subphases while
fulfilling constraints of thermodynamic stability. The width of the transition
depends on a free parameter, the pressure increment relative to the critical
pressure of a Maxwell construction. As an example we present a trigonometric
function ansatz for the switch function together with a pressure increment
during the transition. We note that the resulting mixed phase equation of state
bears similarities with the appearance of substitutional compounds in neutron
star crusts and with the sequence of transitions between different pasta phases
in the hadrontoquark matter transition. We apply this method to the case of a
hadrontoquark matter transition and test the robustness of the compact star
mass twin phenomenon against the appearance of pasta phases modeled in this
way.

Measurements of isospin asymmetry and difference of direct $CP$ asymmetries in $B \to X_s \gamma$ decays with a sumofexclusive technique. (arXiv:1807.04236v3 [hepex] UPDATED)
Authors: S. Watanuki, A. Ishikawa, A. Abdesselam, I. Adachi, K. Adamczyk, J. K. Ahn, H. Aihara, S. Al Said, K. Arinstein, Y. Arita, D. M. Asner, H. Atmacan, V. Aulchenko, T. Aushev, R. Ayad, T. Aziz, V. Babu, I. Badhrees, S. Bahinipati, A. M. Bakich, Y. Ban, V. Bansal, E. Barberio, M. Barrett, W. Bartel, P. Behera, C. Beleno, K. Belous, M. Berger, F. Bernlochner, D. Besson, V. Bhardwaj, B. Bhuyan, T. Bilka, J. Biswal, T. Bloomfield, A. Bobrov, A. Bondar, G. Bonvicini, A. Bozek, M. Bravcko, N. Braun, F. Breibeck, J. Brodzicka, T. E. Browder, L. Cao, G. Caria, D. Cervenkov, M.C. Chang, P. Chang, Y. Chao, V. Chekelian, A. Chen, K.F. Chen, B. G. Cheon, K. Chilikin, R. Chistov, K. Cho, V. Chobanova, S.K. Choi, Y. Choi, S. Choudhury, D. Cinabro, J. Crnkovic, S. Cunliffe, T. Czank, M. Danilov, N. Dash, et al. (384 additional authors not shown)
We report measurements of isospin asymmetry $\Delta_{0}$ and difference of
direct $CP$ asymmetries $\Delta A_{CP}$ between charged and neutral $B \to X_s
\gamma$ decays. This analysis is based on the data sample containing $772
\times 10^6 B\bar{B}$ pairs that was collected with the Belle detector at the
KEKB energyasymmetric $e^+ e^$ collider. Using a sumofexclusive technique
with invariant $X_s$ mass up to 2.8~GeV/$c^2$, we obtain $\Delta_{0} =
\bigl[+1.70 \pm 1.39 {\rm (stat.)} \pm 0.87 {\rm (syst.)} \pm 1.15
{(f_{+}/f_{00})}\bigr]$\% and $\Delta A_{CP} = \bigl[+1.26 \pm 2.40 {\rm
(stat.)} \pm 0.67{\rm (syst.)}\bigr]$\%, where the last uncertainty for
$\Delta_{0}$ is due to the uncertainty on the fraction of $B^+B^$ to
$B^0\bar{B}^0$ production in $\Upsilon(4S)$ decays. The measured value of
$\Delta_{0}$ is consistent with zero, allowing to constrain the resolved
photon contributions in the $B \to X_s \gamma$ decay as well as to improve the
branching fraction prediction. The result for $\Delta A_{CP}$ is consistent
with a prediction of the SM. We also measure the direct $CP$ asymmetries for
charged and neutral $B \to X_s \gamma$ decays. All the measurements are the
most precise to date.

The three and fourHiggs couplings in the general twoHiggsdoublet model. (arXiv:1807.04244v2 [hepph] UPDATED)
Authors: D. Jurciukonis, L. Lavoura
We apply the unitarity bounds and the boundedfrombelow (BFB) bounds to the
most general scalar potential of the twoHiggsdoublet model (2HDM). We do this
in the Higgs basis, i.e. in the basis for the scalar doublets where only one
doublet has vacuum expectation value. In this way we obtain bounds on the
scalar masses and couplings that are valid for all 2HDMs. We compare those
bounds to the analogous bounds that we have obtained for other simple
extensions of the Standard Model (SM), namely the 2HDM extended by one scalar
singlet and the extension of the SM through two scalar singlets.

NonUnitary Evolution in the General Extended EFT of Inflation & Excited Initial States. (arXiv:1807.06511v1 [hepth] CROSS LISTED)
Authors: Amjad Ashoorioon
I study the "general" case that arises in the Extended Effective Field Theory
of Inflation (gEEFToI), in which the coefficients of the sixth order polynomial
dispersion relation depend on the physical wavelength of the fluctuation mode,
hence they are timedependent. At arbitrarily short wavelengths the unitarity
is lost for each mode. Depending on the values of the gEEFToI parameters in the
unitary gauge action, two scenarios can arise: in one, the coefficients of the
polynomial become singular, flip signs at some physical wavelength and
asymptote to a constant value as the wavelength of the mode is stretched to
infinity. Starting from the WKB vacuum, the twopoint function is essentially
singular in the infinite IR limit. In the other case, the coefficients of the
dispersion relation evolve monotonically from zero to a constant value in the
infinite IR. In order to have a finite power spectrum starting from the vacuum
in this case, the mode function has to be an eigensolution of the Confluent
Heun (CH) equation, which leads to a very confined parameter space for gEEFToI.
Finally, I look at a solution of the CH equation which is regular in the
infinite IR limit and yields a finite power spectrum in either scenario. I
demonstrate that this solution asymptotes to an excited state in past infinity
in both cases. The result is interpreted in the light of the loss of unitarity
for very small wavelengths. The outcome of such a nonunitary phase evolution
should prepare each mode in the excited initial state that yields a finite
twopoint function for all the parameter space. This will be constraining of
the new physics that UV completes such scenarios.
