
Probing Muonic Forces and Dark Matter at Kaon Factories. (arXiv:1902.07715v1 [hepph])
Authors: Gordan Krnjaic, Gustavo MarquesTavares, Diego Redigolo, Kohsaku Tobioka
Rare kaon decays are excellent probes of light, new weaklycoupled particles.
If such particles $X$ couple preferentially to muons, they can be produced in
$K\to \mu \nu X$ decays. In this letter we evaluate the future sensitivity for
this process at NA62 assuming $X$ decays either invisibly or to dimuons. Our
main physics target is the parameter space that resolves the $(g2)_\mu$
anomaly, where $X$ is a gauged $L_\muL_\tau$ vector or a muonphilic scalar.
The same parameter space can also accommodate dark matter freeze out or reduce
the tension between cosmological and local measurements of $H_0$ if the new
force decays to dark matter or neutrinos, respectively. We show that for
invisible $X$ decays, a dedicated single muon trigger analysis at NA62 could
probe much of the remaining $(g2)_\mu$ favored parameter space. Alternatively,
if $X$ decays to muons, NA62 can perform a dimuon resonance search in $K\to 3
\mu \nu$ events and greatly improve existing coverage for this process.
Independently of its sensitivity to new particles, we find that NA62 is also
sensitive to the Standard Model predicted rate for $K \to 3\mu \nu$, which has
never been measured.

Higgs Parity, Strong CP, and Dark Matter. (arXiv:1902.07726v1 [hepph])
Authors: David Dunsky, Lawrence J. Hall, Keisuke Harigaya
An exact spacetime parity replicates the $SU(2) \times U(1)$ electroweak
interaction, the Higgs boson $H$, and the matter of the Standard Model. This
"Higgs Parity" and the mirror electroweak symmetry are spontaneously broken at
scale $v' = \left\langle{H'} \right\rangle \gg \left\langle{H}\right\rangle$,
yielding the Standard Model below $v'$ with a quartic coupling that essentially
vanishes at $v'$: $\lambda_{SM}(v') \sim 10^{3}$. The strong CP problem is
solved as Higgs parity forces the masses of mirror quarks and ordinary quarks
to have opposite phases. Dark matter is composed of mirror electrons, $e'$,
stabilized by unbroken mirror electromagnetism. These interact with Standard
Model particles via kinetic mixing between the photon and the mirror photon,
which arises at fourloop level and is a firm prediction of the theory. Physics
below $v'$, including the mass and interaction of $e'$ dark matter, is
described by $\textit{one fewer parameter}$ than in the Standard Model. The
allowed range of $m_{e'}$ is determined by uncertainties in $(\alpha_s, m_t,
m_h)$, so that future precision measurements of these will be correlated with
the direct detection rate of $e'$ dark matter, which, together with the neutron
electric dipole moment, will probe the entire parameter space.

Superasymptotic and Hyperasymptotic approximation to the Operator Product Expansion. (arXiv:1902.07736v1 [hepth])
Authors: Cesar Ayala, Xabier Lobregat, Antonio Pineda
Given an observable and its operator product expansion (OPE), we present
expressions that carefully disentangle truncated sums of the perturbative
series in powers of $\alpha$ from the nonperturbative (NP) corrections. This
splitting is done with NP power accuracy. Analytic control of the splitting is
achieved and the organization of the different terms is done along an
super/hyperasymptotic expansion. As a test we apply the methods to the static
potential in the large $\beta_0$. We see the superasymptotic and
hyperasymptotic structure of the observable in full glory.

Cosmological Magnetic Field and Dark Energy as two sides of the same coin. (arXiv:1902.07737v1 [hepph])
Authors: Ariel R. Zhitnitsky
It has been recently argued \cite{Barvinsky:2017lfl} that the de Sitter phase
in cosmology might be naturally generated as a result of dynamics of the
topologically nontrivial sectors in a strongly coupled QCDlike gauge theory in
expanding universe. It is known that the de Sitter phase is realized in the
history of our Universe twice: the first occurrence is coined as the inflation,
while the second time (which is occurring now) is dubbed as the dark energy
(DE). The crucial element of the proposal \cite{Barvinsky:2017lfl} is the
presence of a nontrivial gauge holonomy which is the source of the vacuum
energy leading to the de Sitter behaviour. It has been also argued that the
anomalous coupling of the system with the Standard Model (SM) particles leads
to the reheating epoch in case of the {\it inflationary} phase. A similar
anomalous coupling of the system with the Maxwell $E\&M$ field during the {\it
DE epoch} generates the cosmological magnetic field. The intensity of the field
is estimated on the level of $10^{10}$G while the corresponding correlation
length reaches the scale of the visible Universe.

Probing the Neutrino Mass Ordering with Atmospheric Neutrinos from Three Years of IceCube DeepCore Data. (arXiv:1902.07771v1 [hepex])
Authors: M. G. Aartsen, M. Ackermann, J. Adams, J. A. Aguilar, M. Ahlers, M. Ahrens, C. Alispach, K. Andeen, T. Anderson, I. Ansseau, G. Anton, C. Argüelles, J. Auffenberg, S. Axani, P. Backes, H. Bagherpour, X. Bai, A. Barbano, S. W. Barwick, V. Baum, R. Bay, J. J. Beatty, K.H. Becker, J. Becker Tjus, S. BenZvi, D. Berley, E. Bernardini, E. Bernardini, D. Z. Besson, G. Binder, D. Bindig, E. Blaufuss, S. Blot, C. Bohm, M. Börner, S. Böser, O. Botner, E. Bourbeau, J. Bourbeau, F. Bradascio, J. Braun, H.P. Bretz, S. Bron, J. BrosteanKaiser, A. Burgman, R. S. Busse, T. Carver, C. Chen, E. Cheung, D. Chirkin, K. Clark, L. Classen, G. H. Collin, J. M. Conrad, P. Coppin, P. Correa, D. F. Cowen, R. Cross, P. Dave, J. P. A. M. de André, C. De Clercq, J. J. DeLaunay, H. Dembinski, K. Deoskar, et al. (272 additional authors not shown)
The Neutrino Mass Ordering (NMO) remains one of the outstanding questions in
the field of neutrino physics. One strategy to measure the NMO is to observe
matter effects in the oscillation pattern of atmospheric neutrinos above $\sim
1\,\mathrm{GeV}$, as proposed for several nextgeneration neutrino experiments.
Moreover, the existing IceCube DeepCore detector can already explore this type
of measurement. We present results of a first search for the signature of the
NMO with three years of DeepCore data based on two independent analyses. These
analyses include a full treatment of systematic uncertainties and a
statisticallyrigorous method to determine the significance for the NMO from a
fit to the data. For the more sensitive analysis, we observe a preference for
Normal Ordering with a $p$value of $p_\mathrm{IO} = 15.3\%$ and
$\mathrm{CL}_\mathrm{s}=53.3\%$ for the Inverted Ordering hypothesis, while the
experimental results from both analyses are consistent within their
uncertainties. Since the result is independent of the value of
$\delta_\mathrm{CP}$ and obtained from energies $E_\nu \gtrsim
5\,\mathrm{GeV}$, it is complementary to recent results from longbaseline
experiments. These analyses set the groundwork for the future of this
measurement with more capable detectors, such as the IceCube Upgrade and the
proposed PINGU detector.

LIGO/Virgo Black Holes from a First Order QCD Phase Transition. (arXiv:1902.07805v1 [hepph])
Authors: Hooman Davoudiasl
We propose that $O(10 M_{\rm Sun})$ black holes observed by LIGO/Virgo
originate from a first order QCD phase transition at a temperature $T_*
\lesssim 100$ MeV. This is implemented by keeping the Higgs vacuum expectation
value and hence quark masses at zero down to $T\sim T_*$, making QCD
confinement a first order electroweak phase transition. This electrostrong
transition could have interesting ramifications for particle cosmology, as
electroweak sphalerons stay active till $T \gtrsim T_*$. We realize our
scenario through hidden gauge dynamics and a scalar which could potentially be
viable dark matter.

Palatini formulation of pure $R^2$ gravity yields Einstein gravity with no massless scalar. (arXiv:1902.07876v1 [hepth])
Authors: Ariel Edery, Yu Nakayama
Pure $R^2$ gravity has been shown to be equivalent to Einstein gravity with
nonzero cosmological constant and a massless scalar field. We show that the
Palatini formulation of pure $R^2$ gravity is equivalent to Einstein gravity
with nonzero cosmological constant as before but with no massless scalar
field. This is an important new development because the massless scalar field
is not readily identifiable with any known particle in nature or unknown
particles like cold dark matter which are expected to be massive. We then
include a nonminimally coupled Higgs field as well as fermions to discuss how
the rest of the standard model fields fit into this paradigm.

Singlespin asymmetry in dihadron production in SIDIS off the longitudinally polarized nucleon target. (arXiv:1902.07889v1 [hepph])
Authors: Wei Yang, Xiaoyu Wang, Yongliang Yang, Zhun Lu
We study the single longitudinalspin asymmetry of dihadron production in
semiinclusive deep inelastic scattering process. We consider the collinear
picture in which the transverse momentum of the finalstate hadron pair is
integrated out, such that the $\sin \phi_R$ azimuthal asymmetry arises from the
coupling $h_L\, H_{1}^{\sphericalangle}$ as well as the coupling $g_1
\,\widetilde{G}^{\sphericalangle}$. We calculate the unknown twist3 dihadron
fragmentation function $\widetilde{G}^{\sphericalangle}$ using a spectator
model which is successful in describing the dihadron production in the
unpolarized process. Using the spectator model results for the quark
distributions and dihadron fragmentation functions, we estimate the $\sin
\phi_R$ asymmetry of dihadron production in SIDIS at the kinematics of COMPASS
and compare it with the COMPASS preliminary data. In addition, the prediction
on the $\sin \phi_R$ asymmetry at the typical kinematics of the future Electron
Ion Collider is also presented. In order to test the reliability of the
spectator model estimate, we compare the model result for the distribution
$h_L$ with the WandzuraWilczek approximation for that distribution, and
compare $H_{1}^{\sphericalangle}$ with the existing parametrization. Although
the asymmetry is dominated by the $h_L H_{1}^{\sphericalangle}$ term, we find
that the contribution from the $g_1\, \widetilde{G}^{\sphericalangle}$ term
should also be taken into account in certain kinematical region.

Charged neutron stars and observational tests of a dark force weaker than gravity. (arXiv:1902.07914v1 [hepph])
Authors: Marco Fabbrichesi, Alfredo Urbano
We discuss the possibility of exploring an unbroken U(1) gauge interaction in
the dark sector by means of gravitational waves. Dark sector states charged
under the dark force can give a macroscopic charge to astronomical bodies. Yet
the requirement of having gravitationally bounded stars limits this charge to
negligible values if the force has a sizeable strength. Gravitational tests are
only possible if the dark force is weaker than gravity. By solving the
EinsteinMaxwell field equations, we study in detail an explicit model for dark
charge generation and separation in a neutron star. Charged states originate
from the decay of neutrons inside the star into three dark fermions; we show
that in this model the equation of state is consistent with limits on neutron
star masses and tidal deformability. We find that while the dark force can be
observed in binary mergers (making them an optimal observational test even
though with limited precision), it is Debye screened in binary pulsars (for
which more precise data exist). The emitted radiation in the inspiral phase of
a binary system is modified and the dark force tested at the level of the
uncertainty of the experimental detection. The test covers a region where
current limits on deviations from Newton inversesquared law come from
geophysical and laserranging observations.

Violation of WiedemannFranz Law for a Hot Hadronic Matter created at NICA, FAIR and RHIC Energies using Nonextensive Statistics. (arXiv:1902.07922v1 [hepph])
Authors: Rutuparna Rath, Sushanta Tripathy, Bhaswar Chatterjee, Raghunath Sahoo, Swatantra K. Tiwari, Abhishek Nath
We present here the computation of electrical and thermal conductivity by
solving the Boltzmann transport equation in relaxation time approximation. We
use the $q$generalized Boltzmann distribution function to incorporate the
effects of nonextensivity. The behaviour of these quantities with changing
temperature and baryochemical potential has been studied as the system slowly
moves towards thermodynamic equilibrium. We have estimated the Lorenz number at
NICA, FAIR and the top RHIC energies and studied as a function of temperature,
baryochemical potential and the nonextensive parameter, $q$. We have observed
that WiedemannFranz law is violated for a nonextensive hadronic phase.

Thermal radiation and inclusive production in the CGC/saturation approach at high energies. (arXiv:1902.07923v1 [hepph])
Authors: E. Gotsman (Tel Aviv U.), E. Levin (Tel Aviv U./UTFSM)
In this paper, we discuss the inclusive production of hadrons in the
framework of CGC/saturation approach. We argue, that the gluon jet inclusive
production stems from the vicinity of the saturation momentum, even for small
values of the transverse momenta $p_T$. Since in this region, theoretically, we
know the scattering amplitude, we claim that we can provide reliable estimates
for this process. We demonstrate, that in a widely accepted model for
confinement, to describe the experimental data, we require a thermal radiation
term. In this model the parton (quark or gluon) with the transverse momenta of
the order of $Q_s$ decays into hadrons with the given fragmentation functions.
However, we show that other approaches for the confinement could describe the
data, without a need for the thermal emission

Low $x$ physics as an infinite twist (G)TMD framework: unravelling the origins of saturation. (arXiv:1902.07930v1 [hepph])
Authors: Tolga Altinoluk, Renaud Boussarie
We show how the formulations of low $x$ physics involving Wilson line
operators can be fully rewritten into an infinite twist TMD or GTMD framework,
respectively for inclusive and exclusive observables. This leads to a perfect
match between low $x$ physics and moderate $x$ formulations of QCD in terms of
GTMDs, TMDs, GPDs or PDFs. We derive the BFKL limit as a kinematic limit and
argue that beyond the WandzuraWilczek approximation, 3body and 4body
unintegrated PDFs should be taken into account even in this regime. Finally, we
analyze how saturation should be understood as three distinct effects:
saturation through nonlinearities in the evolution equations at small $x$,
saturation through multiple interactions with slow gluons as TMD gauge links,
and saturation as the enhancement of genuine twist corrections.

On Future HighEnergy Colliders. (arXiv:1902.07964v1 [physics.histph])
Authors: Gian Francesco Giudice
I outline some of the physics reasons to pursue a future programme in
highenergy colliders.

Twoloop splitting in double parton distributions. (arXiv:1902.08019v1 [hepph])
Authors: Markus Diehl, Jonathan R. Gaunt, Peter Ploessl, Andreas Schafer
Double parton distributions (DPDs) receive a shortdistance contribution from
a single parton splitting to yield the two observed partons. We investigate
this mechanism at nexttoleading order (NLO) in perturbation theory.
Technically, we compute the twoloop matching of both the position and momentum
space DPDs onto ordinary PDFs. This also yields the 1 > 2 splitting functions
appearing in the evolution of momentumspace DPDs at NLO. We give results for
the unpolarised, coloursinglet DPDs in all partonic channels. These quantities
are required for calculations of double parton scattering at full NLO. We
discuss various kinematic limits of our results, and we verify that the 1 > 2
splitting functions are consistent with the number and momentum sum rules for
DPDs.

Cliffordbased spectral action and renormalization group analysis of the gauge couplings. (arXiv:1902.08090v1 [hepph])
Authors: Ufuk Aydemir
The Spectral Action Principle in the noncommutative geometry framework
provides simultaneous derivation of the actions of the Standard Model and
General Relativity by reconciling them in a geometric setting, and hence offers
an explanation for their common origin. However, one of the requirements in the
minimal formalism, unification of the gauge coupling constants, is not
satisfied, since the basic construction does not introduce anything new that
can change the renormalization group running of the Standard Model, in which
unification is known not to be realized; this is indeed one of the reasons why
extensions to the minimal formalism have been constructed. On the other hand,
it has been recently argued that incorporating structure of the Clifford
algebra into the finite part of the spectral triple, which is the main object
that encodes the complete information of a noncommutative space, gives rise to
five additional scalar fields in the basic framework, three of which have the
same quantum numbers. In this paper, we address the question whether these
scalars can help to achieve unification of the gauge couplings in this modified
minimal formalism. Adopting the most general approach, we perform a
sixparameter renormalization group analysis at the oneloop level, allowing
the mass values of these five scalars to float from the electroweak scale to
putative unification scale, i.e. emergence scale of the spectral action. We
show that out of twenty possible configurations of mass hierarchy of these
additional scalars, there does not exist even a single case that can lead to
unification. In consequence, the spectral action formalism requires a model
construction scheme beyond the (modified) minimal framework.

Boosted Top quark polarization. (arXiv:1902.08096v1 [hepph])
Authors: Rohini Godbole, Monoranjan Guchait, Charanjit K. Khosa, Jayita Lahiri, Seema Sharma, Aravind H. Vijay
In top quark production, the polarization of top quarks, decided by the
chiral structure of couplings, is likely to be modified in the presence of any
new physics contribution to the production. Hence the same is a good
discriminator for those new physics models wherein the couplings have a chiral
structure different than that in the Standard Model (SM). In this note we
construct probes of the polarization of a top quark decaying hadronically,
using easily accessible kinematic variables such as the energy fraction or
angular correlations of the decay products. Tagging the boosted top quark using
the usual jet sub structure technique we study robustness of these observables
for a benchmark process, $W^{\prime} \to tb$. We demonstrate that the energy
fraction of bjet in the laboratory frame and a new angular variable,
constructed by us in the top rest frame, are both very powerful tools to
discriminate between the left and right polarized top quarks. Based on the
polarization sensitive angular variables, we construct asymmetries which
reflect the polarization. We study the efficiency of these variables for two
new physics processes where which give rise to boosted top quarks: (i) decay of
the top squark in the context of supersymmetry searches, and (ii) decays of the
KaluzaKlein(KK) graviton and KK gluon, in Randall Sundrum(RS) model.
Remarkably, it is found that the asymmetry can vary over a wide range about
+20\% to 20\%. The dependence of asymmetry on top quark couplings of the new
particles present in these models beyond the SM (BSM) is also investigated in
detail.

A single TeVscale scalar leptoquark in $\mathbf{SO(10)}$ grand unification and $\mathbf{B}$decay anomalies. (arXiv:1902.08108v1 [hepph])
Authors: Ufuk Aydemir, Tanumoy Mandal, Subhadip Mitra
One of the explanations proposed for the recent rare $B$decay anomalies is
the existence of a scalar leptoquark. We investigate a grand unification
scenario where a single, charge 1/3 scalar leptoquark ($S_1$) is present as
the only new physics candidate at the TeVscale. This leptoquark along with the
Standard Model (SM) Higgs doublet originates from the 10dimensional real
scalar multiplet in $\mathrm{SO}(10)$ grand unification framework. An $S_1$
residing in the same representation as the SM Higgs motivates the idea that its
mass is close to the electroweak scale as the peculiar mass splittings within
this multiplet do not occur. Therefore, possible detection of a TeVscale $S_1$
leptoquark, unaccompanied by any other new particles, could be interpreted in
favour of $\mathrm{SO}(10)$ grand unification. We explicitly show how the gauge
coupling unification is achieved with only one intermediate symmetry breaking
scale at which the PatiSalam gauge group, obtained from the $\mathrm{SO}(10)$
breaking at the unification scale, is broken into the SM group. We investigate
the phenomenological implications of our scenario and show that an $S_1$ with a
specific Yukawa texture can still be a viable candidate to explain the
$R_{D^{(*)}}$ anomalies. In order to obtain the allowed parameter space of our
scenario, we consider the relevant flavour data including $R_{D^{(*)}}$ and
$R_K^{\nu\nu}$ measurements, $Z\to\tau\tau$ decay and the latest $\tau\tau$
resonance search data at the LHC. We find that the LHC data strongly constrain
the $S_1$ parameter space. We also find that there exist parts of parameter
space where a single $S_1$ can still explain the $R_{D^{(*)}}$ anomalies
without being in conflict with any of these constraints.

Exclusive vector meson production in heavy ion collisions. (arXiv:1902.08136v1 [hepph])
Authors: V.A.Khoze, A.D.Martin, M.G.Ryskin
We discuss the salient features of exclusive vector meson production in heavy
ion collisions at LHC energies. Special attention is paid to the spacetime
picture of the process. We account for both coherent and incoherent
contributions. The explicit quantitative predictions are given for the
$\rho$meson differential cross section in leadlead collisions in different
kinematical configurations relevant for the LHCb and ALICE experiments.

Effectivefield theory analysis of the $\tau^{}\rightarrow (K \pi)^{}\nu_{\tau}$ decays. (arXiv:1902.08143v1 [hepph])
Authors: Javier Rendón, Pablo Roig, Genaro Toledo Sánchez
We analyze the $\tau^\to(K\pi)^\nu_\tau$ decays within an effective field
theory description of heavy new physics (NP) modifying the SM lefthanded weak
charged current and include refined SM input (with controlled uncertainties)
for the participant meson form factors exploiting chiral symmetry, dispersion
relations and data. We include the leading dimension six operators and work at
linear order in the effective couplings. Within this setting we:
i) confirm that it is impossible to understand the BaBar anomaly in the CP
asymmetry measurement (we find an upper bound for the NP contribution slightly
larger than in Phys. Rev. Lett. 120 (2018) no.14, 141803, but still irrelevant
compared to the experimental uncertainty by four orders of magnitude
approximately);
ii) first show that the anomalous bump present in the published Belle data
for the $K_S\pi^$ invariant mass distribution close to threshold cannot be due
to heavy NP;
iii) first bind the heavy NP effective couplings using
$\tau^\to(K\pi)^\nu_\tau$ decays and show that they are competitive with
those found in hyperon semileptonic decays (but clearly not with those obtained
in Kaon (semi)leptonic decays).
We also compare the SM predictions with the possible deviations caused by NP
in a couple of Dalitz plot distributions, in the forwardbackward asymmetry and
in the dimeson invariant mass distribution and discuss the most interesting
measurements to be performed at BelleII using these decays data.

The strong running coupling from the gauge sector of Domain Wall lattice QCD with physical quark masses. (arXiv:1902.08148v1 [hepph])
Authors: S. Zafeiropoulos, Ph. Boucaud, F. De Soto, J. RodríguezQuintero, J. Segovia
We report on the first computation of the strong running coupling at the
physical point (physical pion mass) from the ghostgluon vertex, computed from
lattice simulations with three flavors of Domain Wall fermions. We find
$\alpha_{\overline{\rm MS}}(m_Z^2)=0.1172(11)$, in remarkably good agreement
with the worldwide average. Our computational bridge to this value is the
Taylorscheme strong coupling, which has been revealed of great interest by
itself because it can be directly related to the quarkgluon interaction kernel
in continuum approaches to the QCD boundstate problem.

BFKL Pomeron and the survival factor. (arXiv:1902.08151v1 [hepph])
Authors: V.A.Khoze, A.D.Martin, M.G.Ryskin
We consider the absorptive corrections and the rapidity gap survival factor
which are necessary to provide the unitarization of the BFKL Pomeron. In
particular we discuss the role of the enhanced screening diagrams.

High precision determination of $\alpha_s$ from a global fit of jet rates. (arXiv:1902.08158v1 [hepph])
Authors: Andrii Verbytskyi, Andrea Banfi, Adam Kardos, Pier Francesco Monni, Stefan Kluth, Gábor Somogyi, Zoltán Szőr, Zoltán Trócsányi, Zoltán Tulipánt, Giulia Zanderighi
We present stateoftheart extractions of the strong coupling based on
N$^3$LO+NNLL accurate predictions for the twojet rate in the Durham clustering
algorithm at $e^+e^$ collisions, as well as a simultaneous fit of the two and
threejet rates taking into account correlations between the two observables.
The fits are performed on a large range of data sets collected at LEP and PETRA
colliders, with energies spanning from $35$ GeV to $207$ GeV. Owing to the high
accuracy of the predictions used, the perturbative uncertainty is considerably
smaller than that due to hadronization. Our best determination at the $Z$ mass
is $\alpha_s(M_Z) = 0.11881 \pm 0.00063(exp.) \pm 0.00101(hadr.) \pm
0.00045(ren.) \pm 0.00034(res.)$, which is in agreement with the latest world
average and has a comparable total uncertainty.

Scattering amplitudes versus potentials in nuclear effective field theory: is there a potential compromise?. (arXiv:1902.08172v1 [nuclth])
Authors: Manuel Pavon Valderrama
In effective field theory physical quantities, in particular observables, are
expressed as a power series in terms of a small expansion parameter. For
nonperturbative systems, for instance nuclear physics, this requires the
nonperturbative treatment of at least a part of the interaction (or the
potential, if we are dealing with a nonrelativistic system). This is not
entirely trivial and as a consequence different interpretations on how to treat
these systems have appeared. A practical approach is to expand the effective
potential, where this potential is later fully iterated in the Schr\"odinger
equation for obtaining amplitudes and observables. The expectation is that this
will lead to observables that will have an implicit power counting expansion.
Here we explicitly check whether the amplitudes are actually following the same
power counting as the potential. It happens that reality does not necessarily
conform to expectations and the amplitudes will often violate the power
counting with which the potential has been expanded. A more formal approach is
to formulate the expansion directly in terms of amplitudes and observables,
which is the original aim of the effective field theory idea. Yet this second
approach is technically complicated. We explore here the possibility of
constructing potentials that when fully iterated will make sure that amplitudes
indeed are expansible in terms of a small expansion parameter.

Instability of exotic compact objects and its implications for gravitationalwave echoes. (arXiv:1902.08180v1 [grqc])
Authors: Baoyi Chen, Yanbei Chen, Yiqiu Ma, KaLok R. Lo, Ling Sun
Exotic compact objects (ECOs) have recently become an exciting research
subject, since they are speculated to have a special response to the incident
gravitational waves (GWs) that leads to GW echoes. We show that energy carried
by GWs can easily cause the event horizon to form out of a static ECO 
leaving no echo signals towards spatial infinity. To show this, we use the
ingoing Vaidya spacetime and take into account the back reaction due to
incoming GWs. Demanding that an ECO does not collapse into a black hole puts an
upper bound on the compactness of the ECO, at the cost of less distinct echo
signals for smaller compactness. The tradeoff between echoes' detectability
and distinguishability leads to a fine tuning of ECO parameters for LIGO to
find distinct echoes. We also show that an extremely compact ECO that can
survive the gravitational collapse and give rise to GW echoes might have to
expand its surface in a noncausal way.

When Primordial Black Holes from Sound Speed Resonance Meet a Stochastic Background of Gravitational Waves. (arXiv:1902.08187v1 [astroph.CO])
Authors: YiFu Cai, Chao Chen, Xi Tong, DongGang Wang, ShengFeng Yan
As potential candidates of dark matter, primordial black holes (PBHs) are
within the core scopes of various astronomical observations. In light of the
explosive development of gravitational wave (GW) and radio astronomy, we
thoroughly analyze a stochastic background of cosmological GWs, induced by over
large primordial density perturbations, with several spikes that was inspired
by the sound speed resonance effect and can predict a particular pattern on the
mass spectrum of PBHs. With a specific mechanicsm for PBHs formation, we for
the first time perform the study of such induced GWs that originate from both
the inflationary era and the radiationdominated phase. We report that, besides
the traditional process of generating GWs during the radiationdominated phase,
the contribution of the induced GWs in the subHubble regime during inflation
can become significant at critical frequency band because of a narrow resonance
effect. All contributions sum together to yield a specific profile of the
energy spectrum of GWs that can be of observable interest in forthcoming
astronomical experiments. Our study shed light on the possible joint probe of
PBHs via various observational windows of multimessenger astronomy, including
the search for electromagnetic effects with astronomical telescopes and the
stochastic background of relic GWs with GW instruments.

Electromagnetic instability and Schwinger effect in the WittenSakaiSugimoto model with D0D4 background. (arXiv:1612.07087v3 [hepth] UPDATED)
Authors: Wenhe Cai, Kangle Li, Siwen Li
Using the WittenSakaiSugimoto model in the D0D4 background, we
holographically compute the vacuum decay rate of the Schwinger effect in this
model. Our calculation contains the influence of the D0brane density which
could be identified as the $\theta$ angle or chiral potential in QCD. Under the
strong electromagnetic fields, the instability appears due to the creation of
quarkantiquark pairs and the associated decay rate can be obtained by
evaluating the imaginary part of the effective EulerHeisenberg action which is
identified as the action of the probe brane with a constant electromagnetic
field. In the bubble D0D4 configuration, we find the decay rate decreases when
the $\theta$ angle increases since the vacuum becomes heavier in the present of
the glue condensate in this system. And the decay rate matches to the result in
the black D0D4 configuration at zero temperature limit according to our
calculations. In this sense, the HawkingPage transition of this model could be
consistently interpreted as the confined/deconfined phase transition.
Additionally there is another instability from the D0brane itself in this
system and we suggest that this instability reflects to the vacuum decay
triggered by the $\theta$ angle as it is known in the $\theta$dependent QCD.

Probing underlying event in Zboson events using event shape observables. (arXiv:1801.05218v2 [hepph] UPDATED)
Authors: Deepak Kar, Dimbiniaina Soanasolo Rafanoharana
Experimental measurements of observables sensitive to the underlying event
(UE) in $Z$boson events have been performed by both ATLAS and CMS experiments
at the LHC. However, in the busy LHC environment, these observables receive
substantial contribution from jets originating from initial state radiation
(ISR). We probe if using event shape observables in conjunction with the UE
observables can help us to disentangle the effect of the UE from jets
originating in ISR.

From homogeneous matter to finite nuclei: Role of the effective mass. (arXiv:1805.11321v2 [nuclth] UPDATED)
Authors: Hana Gil, Panagiota Papakonstantinou, Chang Ho Hyun, Yongseok Oh
Recent astronomical observations, nuclearreaction experiments, and
microscopic calculations have placed new constraints on the nuclear equation of
state (EoS) and revealed that most nuclear structure models fail to satisfy
those constraints upon extrapolation to infinite matter. A reverse procedure
for imposing EoS constraints on nuclear structure has been elusive. Here we
present for the first time a method to generate a microscopic energy density
functional (EDF) for nuclei from a given immutable EoS. The method takes
advantage of a natural Ansatz for homogeneous nuclear matter, the KohnSham
framework, and the Skyrme formalism. We apply it to the realistic nuclear EoS
of AkmalPandharipandeRavenhall and describe successfully closed(sub)shell
nuclei. In the process, we provide predictions for the neutron skin thickness
of nuclei based directly on the given EoS. Crucially, bulk and static nuclear
properties are found practically independent of the assumed effective mass
value  a unique result in bridging EDF of finite and homogeneous systems in
general.

A Systematic Expansion of Running Couplings and Masses. (arXiv:1806.02534v4 [hepth] UPDATED)
Authors: F.A. Chishtie, D.G.C. McKeon, T.N. Sherry
As an alternative to directly integrating their defining equations to find
the running coupling $a(\mu)$ and the running mass $m(\mu)$, we expand these
quantities in powers of $\ln\left(\frac{\mu}{\mu^\prime}\right)$ and their
boundary values $a(\mu^\prime)$ and $m(\mu^\prime)$. Renormalization group
summation is used to partially sum these logarithms. We consider this approach
using both the $\overline{MS}$ and 't Hooft renormalization schemes. We also
show how the couplings and masses in any two mass independent renormalization
schemes are related.

Energetics of HighEnergy Cosmic Radiations. (arXiv:1806.04194v2 [astroph.HE] UPDATED)
Authors: Kohta Murase, Masataka Fukugita
The luminosity densities of highenergy cosmic radiations are studied to find
connections among the various components, including highenergy neutrinos
measured with IceCube and gamma rays with the Fermi satellite. Matching the
cosmicray energy generation rate density in a GeVTeV range estimated for
Milky Way with the ultrahighenergy component requires a powerlaw index of the
spectrum, $s_{\rm cr}\approx2.12.2$, somewhat harder than $s_{\rm
cr}\approx2.32.4$ for the local index derived from the AMS02 experiment. The
soft GeVTeV cosmicray spectrum extrapolated to higher energies can be
compatible with PeV cosmic rays inferred from neutrino measurements, but
overshoots the CR luminosity density to explain GeVTeV gamma rays. The
extrapolation from ultrahigh energies with a hard spectrum, on the other hand,
can be consistent with both neutrinos and gammarays. These point towards
either reacceleration of galactic cosmic rays or the presence of extragalactic
sources with a hard spectrum. We discuss possible cosmicray sources that can
be added.

Extension of the electrodynamics in the presence of the axion and dark photon. (arXiv:1806.09972v3 [hepph] UPDATED)
Authors: Fa Peng Huang, HyeSung Lee
We present the extended electrodynamics in the presence of the axion and dark
photon. We derive the extended versions of Maxwell's equations and dark
Maxwell's equations (for both massive and massless dark photons) as well as the
wave equations. We discuss the implications of this extended electrodynamics
including the enhanced effects in the particle conversions under the external
magnetic or dark magnetic field. We also discuss the recently reported anomaly
in the redshifted 21cm spectrum using the extended electrodynamics.

Primordial Black Holes from the QCD axion. (arXiv:1807.01707v2 [hepph] UPDATED)
Authors: Francesc Ferrer, Eduard Masso, Giuliano Panico, Oriol Pujolas, Fabrizio Rompineve
We propose a mechanism to generate Primordial Black Holes (PBHs) which is
independent of cosmological inflation and occurs slightly below the QCD phase
transition. Our setup relies on the collapse of longlived stringdomain wall
networks and is naturally realized in QCD axion models with domain wall number
$N_{DW}>1$ and PecceiQuinn symmetry broken after inflation. In our framework,
dark matter is mostly composed of axions in the meV mass range along with a
small fraction, $\Omega_{\text{PBH}} \gtrsim 10^{6} \Omega_{\text{CDM}} $ of
heavy $M \sim 10^410^7 M_\odot$ PBHs. The latter could play a role in
alleviating some of the shortcomings of the $\Lambda$CDM model on subgalactic
scales. The scenario has distinct signatures in ongoing axion searches as well
as gravitational wave observatories.

Charged hadron fragmentation functions from collider data. (arXiv:1807.03310v3 [hepph] UPDATED)
Authors: The NNPDF Collaboration: Valerio Bertone, Nathan P. Hartland, Emanuele R. Nocera, Juan Rojo, Luca Rottoli
We present NNFF1.1h, a new determination of unidentified chargedhadron
fragmentation functions (FFs) and their uncertainties. Experimental
measurements of transversemomentum distributions for chargedhadron production
in proton(anti)proton collisions at the Tevatron and at the LHC are used to
constrain a set of FFs originally determined from electronpositron
annihilation data. Our analysis is performed at nexttoleading order in
perturbative quantum chromodynamics. We find that the hadroncollider data is
consistent with the electronpositron data and that it significantly constrains
the gluon FF. We verify the reliability of our results upon our choice of the
kinematic cut in the hadron transverse momentum applied to the hadroncollider
data and their consistency with NNFF1.0, our previous determination of the FFs
of charged pions, kaons, and protons/antiprotons.

A new mechanism to enhance primordial tensor fluctuations in single field inflation. (arXiv:1808.10475v2 [grqc] UPDATED)
Authors: Maria Mylova, Ogan Özsoy, Susha Parameswaran, Gianmassimo Tasinato, Ivonne Zavala
We discuss a new mechanism to enhance the spectrum of primordial tensor
fluctuations in single field inflationary scenarios. The enhancement relies on
a transitory nonattractor inflationary phase, which amplifies the wouldbe
decaying tensor mode, and gives rise to a growth of tensor fluctuations at
superhorizon scales. We show that the enhancement produced during this phase
can be neatly treated via a tensor duality between an attractor and
nonattractor phase, which we introduce. We illustrate the mechanism and
duality in a kinetically driven scenario of inflation, with nonminimal
couplings between the scalar and the metric.

Charmed Baryon Decay to a Strange Baryon Plus a Pion Using QCD Sum Rules. (arXiv:1809.00199v5 [hepph] UPDATED)
Authors: Leonard S. Kisslinger, Bijit Singha
This is an extension of the prediction of strange baryon decays to the decays
of charmed baryons using QCD Sum Rules. Using QCD Sum Rules we estimate the
decay $\Lambda^+_c (udc) \rightarrow \Lambda^o_s(uds)+ \pi^+$. Although some
weak decays of the $\Lambda^+_c$ have been measured, since it is difficult to
measure $\Lambda^+_c \rightarrow \Lambda^o_s+ \pi^+$ our estimates should be
useful for future experiments

2HDECAY  A program for the Calculation of Electroweak OneLoop Corrections to Higgs Decays in the TwoHiggsDoublet Model Including StateoftheArt QCD Corrections. (arXiv:1810.00768v2 [hepph] UPDATED)
Authors: Marcel Krause, Margarete Muhlleitner, Michael Spira
We present the program package 2HDECAY for the calculation of the partial
decay widths and branching ratios of the Higgs bosons of a general
CPconserving 2Higgs doublet model (2HDM). The tool includes the full
electroweak oneloop corrections to all twobody onshell Higgs decays in the
2HDM that are not loopinduced. It combines them with the stateoftheart QCD
corrections that are already implemented in the program HDECAY. For the
renormalization of the electroweak sector an onshell scheme is implemented for
most of the renormalization parameters. Exceptions are the
soft$\mathbb{Z}_2$breaking squared mass scale $m_{12}^2$, where an
$\overline{\text{MS}}$ condition is applied, as well as the 2HDM mixing angles
$\alpha$ and $\beta$, for which several distinct renormalization schemes are
implemented. The tool 2HDECAY can be used for phenomenological analyses of the
branching ratios of Higgs decays in the 2HDM. Furthermore, the separate output
of the electroweak contributions to the treelevel partial decay widths for
several different renormalization schemes allows for an efficient analysis of
the impact of the electroweak corrections and the remaining theoretical error
due to missing higherorder corrections. The latest version of the program
package 2HDECAY can be downloaded from the URL
https://github.com/marcelkrause/2HDECAY .

Baryogenesis and Dark Matter from $B$ Mesons. (arXiv:1810.00880v3 [hepph] UPDATED)
Authors: Gilly Elor, Miguel Escudero, Ann E. Nelson
We present a new mechanism of Baryogenesis and dark matter production in
which both the dark matter relic abundance and the baryon asymmetry arise from
neutral $B$ meson oscillations and subsequent decays. This setup is testable
at hadron colliders and $B$factories. In the early Universe, decays of a long
lived particle produce $B$ mesons and antimesons out of thermal equilibrium.
These mesons/antimesons then undergo CP violating oscillations before quickly
decaying into visible and dark sector particles. Dark matter will be charged
under Baryon number so that the visible sector baryon asymmetry is produced
without violating the total baryon number of the Universe. The produced baryon
asymmetry will be directly related to the leptonic charge asymmetry in neutral
$B$ decays; an experimental observable. Dark matter is stabilized by an
unbroken discrete symmetry, and proton decay is simply evaded by kinematics. We
will illustrate this mechanism with a model that is unconstrained by dinucleon
decay, does not require a high reheat temperature, and would have unique
experimental signals  a positive leptonic asymmetry in $B$ meson decays, a
new decay of $B$ mesons into a baryon and missing energy, and a new decay of
$b$flavored baryons into mesons and missing energy. These three observables
are testable at current and upcoming collider experiments, allowing for a
distinct probe of this mechanism.

Classical behaviour of Qballs in the WickCutkosky model. (arXiv:1810.03558v2 [hepth] UPDATED)
Authors: A.G. Panin, M.N. Smolyakov
In this paper, we continue discussing Qballs in the WickCutkosky model.
Despite Qballs in this model are composed of two scalar fields, they turn out
to be very useful and illustrative for examining various important properties
of Qballs. In particular, in the present paper we study in detail
(analytically and numerically) the problem of classical stability of Qballs,
including the nonlinear evolution of classically unstable Qballs, as well as
the behaviour of Qballs in external fields in the nonrelativistic limit.

Testing Lorentz invariance and CPT symmetry using gammaray burst neutrinos. (arXiv:1810.03571v2 [hepph] UPDATED)
Authors: Xinyi Zhang, BoQiang Ma
A recent work [Y. Huang and B.Q. Ma, Commun. Phys. {\bf 1}, 62 (2018)]
associated all four PeV neutrinos observed by IceCube to gammaray bursts
(GRBs), and revealed a regularity which indicates a Lorentz violation scale
$E_{\rm LV}=(6.5\pm0.4)\times10^{17}$ GeV with opposite sign factors $s=\pm 1$
between neutrinos and antineutrinos. The association of "time delay" and "time
advance" events with neutrinos and antineutrinos (or vice versa) is only a
hypothesis since the IceCube detector cannot tell the chirality of the
neutrinos, and further experimental tests are needed to verify this hypothesis.
We derive the values of the CPTodd Lorentz violating parameters in the
standardmodel extension (SME) framework, and perform a threshold analysis on
the electronpositron pair emission of the superluminal neutrinos (or
antineutrinos). We find that different neutrino/antineutrino propagation
properties, suggested by Y. Huang and B.Q. Ma, can be described in the SME
framework with both Lorentz invariance and CPT symmetry violation, but with a
threshold energy constraint. A viable way on testing the CPT symmetry violation
between neutrinos and antineutrinos is suggested.

An asymptotically safe guide to quantum gravity and matter. (arXiv:1810.07615v2 [hepth] UPDATED)
Authors: Astrid Eichhorn
Asymptotic safety generalizes asymptotic freedom and could contribute to
understanding physics beyond the Standard Model. It is a candidate scenario to
provide an ultraviolet extension for the effective quantum field theory of
gravity through an interacting fixed point of the Renormalization Group.
Recently, asymptotic safety has been established in specific gaugeYukawa
models in four dimensions in perturbation theory, providing a starting point
for asymptotically safe model building. Moreover, an asymptotically safe fixed
point might even be induced in the Standard Model under the impact of quantum
fluctuations of gravity in the vicinity of the Planck scale. This review
contains an overview of the key concepts of asymptotic safety, its application
to matter and gravity models, exploring potential phenomenological implications
and highlighting open questions.

Particle decay from statistical thermal model in high energy nucleusnucleus collision. (arXiv:1810.09101v3 [hepph] UPDATED)
Authors: Ning Yu, Xiaofeng Luo
In high energy nucleusnucleus collisions, it is difficult to measure the
contributions of resonance strong decay and weak decay to the final measured
hadrons as well as the corresponding effects on some physical observables. To
provide a reference from statistical thermal model, we performed a systematic
analysis for the energy dependence of particle yield and yield ratios in Au +
Au collisions. We found that the primary fraction of final hadrons decreases
with increasing collision energy and somehow saturates around
$\sqrt{s_\textrm{NN}}$ = 10 GeV, indicating a limiting temperature in hadronic
interactions. The fraction of strong or weak decay for final hadrons show a
different energy dependence behavior comparing to the primarily produced
hadrons. These energy dependences of various particle yield and yield ratios
from strong or weak decay can provide us with baselines for many hadronic
observables in high energy nucleusnucleus collisions.

Light and heavy flavor dijet production and dijet mass modification in heavy ion collisions. (arXiv:1810.10007v2 [hepph] UPDATED)
Authors: ZhongBo Kang, Jared Reiten, Ivan Vitev, Boram Yoon
Backtoback light and heavy flavor dijet measurements are promising
experimental channels to accurately study the physics of jet production and
propagation in a dense QCD medium. They can provide new insights into the path
length, color charge, and mass dependence of quark and gluon energy loss in the
quarkgluon plasma produced in reactions of ultrarelativistic nuclei. To this
end, we perform a comprehensive study of both light and heavy flavor dijet
production in heavy ion collisions. We propose the modification of dijet
invariant mass distributions in such reactions as a novel observable that shows
enhanced sensitivity to the QGP transport properties and heavy quark mass
effects on inmedium parton showers. This is achieved through the addition of
the jet quenching effects on the individual jets as opposed to their
subtraction. The latter drives the subtle effects on more conventional
observables, such as the dijet momentum imbalance shifts, which we also
calculate here. Results are presented in Pb+Pb collisions at $\sqrt{s_{NN}}$ =
5.02 TeV for comparison to data at the Large Hadron Collider and in Au+Au
collisions at $\sqrt{s_{NN}}$ = 200 GeV to guide the future sPHENIX program at
the Relativistic Heavy Ion Collider.

Gluequark Dark Matter. (arXiv:1811.06975v2 [hepph] UPDATED)
Authors: Roberto Contino, Andrea Mitridate, Alessandro Podo, Michele Redi
We introduce the gluequark Dark Matter candidate, an accidentally stable
bound state made of adjoint fermions and gluons from a new confining gauge
force. Such scenario displays an unusual cosmological history where
perturbative freezeout is followed by a nonperturbative reannihilation
period with possible entropy injection. When the gluequark has electroweak
quantum numbers, the critical density is obtained for masses as large as PeV.
Independently of its mass, the size of the gluequark is determined by the
confinement scale of the theory, leading at low energies to annihilation rates
and elastic cross sections which are large for particle physics standards and
potentially observable in indirect detection experiments.

Impact of final state interactions on neutrinonucleon pion production cross sections extracted from neutrinodeuteron reaction data. (arXiv:1812.00144v2 [hepph] UPDATED)
Authors: S.X. Nakamura (Univ. Science and Technology of China, Univ. Cruzeiro do Sul), H. Kamano (RCNP), T. Sato (RCNP, JPARC)
The current and nearfuture neutrino oscillation experiments require
significantly improved neutrinonucleus reaction models. Neutrinonucleon pion
production data play a crucial role to validate corresponding elementary
amplitudes that go into such neutrinonucleus models. Thus the currently
available data extracted from chargedcurrent neutrinodeuteron reaction data
($\nu_\mu d\to \mu^\pi NN$) must be corrected for nuclear effects such as the
Fermi motion and final state interactions (FSI). We study $\nu_\mu d\to
\mu^\pi NN$ with a theoretical model including the impulse mechanism
supplemented by FSI from $NN$ and $\pi N$ rescatterings. An analysis of the
spectator momentum distributions reveals that the FSI effects significantly
reduce the spectra over the quasifree peak region, and leads to a useful
recipe to extract information of elementary $\nu_\mu N\to \mu^\pi N$ processes
using $\nu_\mu d\to \mu^\pi NN$ data, with the important FSI corrections taken
into account. We provide $\nu_\mu N\to \mu^\pi N$ total cross sections by
correcting the deuterium bubble chamber data for the FSI and Fermi motion. The
results will bring a significant improvement on neutrinonucleus reaction
models for the nearfuture neutrinooscillation experiments.

Revisiting constraints on 3+1 activesterile neutrino mixing using IceCube data. (arXiv:1812.00831v3 [hepph] UPDATED)
Authors: Luis Salvador Miranda, Soebur Razzaque
Recent IceCube search results for sterile neutrino increased tension between
the combined appearance and disappearance experiments. On the other hand,
MiniBooNE latest data confirms at $4.9\sigma$ CL the shortbaseline oscillation
anomaly. We analyze published IceCube data based on two different
activesterile mixing schemes using one additional sterile neutrino flavor. We
present exclusion regions in the parameter ranges $0.01 \le \sin^2 \theta_{24}
\le 0.1$ and $0.1~{\rm eV}^2 \le \Delta m^2_{42} \le 10~{\rm eV}^2$ for the
massmixing and flavormixing schemes. Under the more conservative massmixing
scheme, $3\sigma$ CL allowed regions for the appearance experiment and
MiniBooNE latest result are excluded at $\gtrsim 3\sigma$ CL. In case of
lessrestrictive flavormixing scheme, results from the appearance experiments
are excluded at $\gtrsim 2\sigma$ CL. We also find that including prompt
component of the atmospheric neutrino flux relaxes constraints on sterile
mixing for $\Delta m^2_{42} \gtrsim 1~{\rm eV}^2$.

HighEnergy Expansion of TwoLoop Massive FourPoint Diagrams. (arXiv:1812.04373v3 [hepph] UPDATED)
Authors: Go Mishima
We apply the method of regions to the massive twoloop integrals appearing in
the Higgs pair production cross section at the nexttoleading order, in the
high energy limit. For the nonplanar integrals, a subtle problem arises
because of the indefinite sign of the second Symanzik polynomial. We solve this
problem by performing an analytic continuation of the Mandelstam variables such
that the second Symanzik polynomial has a definite sign. Furthermore, we
formulate the procedure of applying the method of regions systematically. As a
byproduct of the analytic continuation of the Mandelstam variables, we obtain
crossing relations between integrals in a simple and systematic way. In our
formulation, a concept of "template integral" is introduced, which represents
and controls the contribution of each region. All of the template integrals
needed in the computation of the Higgs pair production at the nexttoleading
order are given explicitly. We also develop techniques to solve MellinBarnes
integrals, and show them in detail. Although most of the calculation is shown
for the concrete example of the Higgs pair production process, the application
to other similar processes is straightforward, and we anticipate that our
method can be useful also for other cases.

GravityMediated SUSY Breaking, R Symmetry and Hyperbolic Kaehler Geometry. (arXiv:1812.10284v2 [hepph] UPDATED)
Authors: C. Pallis
A novel realization of the gravitymediated SUSY breaking is presented taking
into account a continuous global R symmetry. Consistently with it, we employ a
linear superpotential for the hidden sector superfield and a Kaehler potential
parameterizing the SU(1,1)/U(1) Kaehler manifold with constant curvature 1/2.
The classical vacuum energy vanishes without unnatural fine tuning and
nonvanishing soft SUSYbreaking parameters, of the order of the gravitino
mass, arise. A solution to the mu problem of MSSM may be also achieved by
conveniently applying the GiudiceMasiero mechanism. The potentially
troublesome R axion may acquire acceptably large mass by explicitly breaking
the R symmetry in the Kaehler potential through a quartic term which does not
affect, though, the achievements above.

Double copy structure of CFT correlators. (arXiv:1812.11129v2 [hepth] UPDATED)
Authors: Joseph A. Farrow, Arthur E. Lipstein, Paul McFadden
We consider the momentumspace 3point correlators of currents, stress
tensors and marginal scalar operators in general odddimensional conformal
field theories. We show that the flat space limit of these correlators is
spanned by gauge and gravitational scattering amplitudes in one higher
dimension which are related by a double copy. Moreover, we recast
threedimensional CFT correlators in terms of treelevel Feynman diagrams
without energy conservation, suggesting double copy structure beyond the flat
space limit.

GaugeIndependent Approach to Resonant Dark Matter Annihilation. (arXiv:1812.11944v2 [hepph] UPDATED)
Authors: Mateusz Duch, Bohdan Grzadkowski, Apostolos Pilaftsis
In spontaneously broken gauge theories, transition amplitudes describing
darkmatter (DM) annihilation processes through a resonance may become highly
inaccurate close to a production threshold, if a BreitWigner (BW) ansatz with
a constant width is used. To partially overcome this problem, the BW propagator
needs to be modified by including a momentum dependent decay width. However,
such an approach to resonant transition amplitudes generically suffers from
gauge artefacts that may also give rise to a bad or ambiguous highenergy
behaviour for such amplitudes. We address the two problems of gauge dependence
and highenergy unitarity within a gaugeindependent framework of resummation
implemented by the socalled Pinch Technique. We study DM annihilation via
scalar resonances in a gauged U(1)$_X$ complexscalar extension of the Standard
Model that features a massive stable gauge field which can play the role of the
DM. We find that the predictions for the DM abundance may vary significantly
from previous studies based on the naive BW ansatz and propose an alternative
simple approximation which leads to the correct DM phenomenology. In
particular, our results do not depend on the gaugefixing parameter and are
consistent with considerations from highenergy unitarity.

Dual MeV GammaRay and Dark Matter Observatory  GRAMS Project. (arXiv:1901.03430v2 [astroph.HE] UPDATED)
Authors: Tsuguo Aramaki, Per Hansson Adrian, Georgia Karagiorgi, Hirokazu Odaka
GRAMS (GammaRay and AntiMatter Survey) is a novel project that can
simultaneously target both astrophysical observations with MeV gamma rays and
an indirect dark matter search with antimatter. The GRAMS instrument is
designed with a costeffective, largescale LArTPC (Liquid Argon Time
Projection Chamber) detector surrounded by plastic scintillators. The
astrophysical observations at MeV energies have not yet been wellexplored (the
socalled "MeVgap") and GRAMS can improve the sensitivity by more than an
order of magnitude compared to previous experiments. While primarily focusing
on MeV gammaray observations, GRAMS is also optimized for cosmic ray
antimatter surveys to indirectly search for dark matter. In particular,
lowenergy antideuterons will provide an essentially backgroundfree dark
matter signature. GRAMS will be a next generation experiment beyond the current
GAPS (General AntiParticle Spectrometer) project for antimatter survey.

Testing for observability of Higgs effective couplings in triphoton production at FCChh. (arXiv:1901.04784v2 [hepph] UPDATED)
Authors: H. Denizli, K. Y. Oyulmaz, A. Senol
We investigate the potential of the $pp\to \gamma\gamma\gamma +X$ process to
probe CPconserving and CPviolating dimensionsix operators of Higgsgauge
boson interactions in a modelindependent Standard Model effective field theory
framework at the center of mass energy of 100 TeV which is designed for Future
Circular hadronhadron Collider. Signal events in the existence of anomalous
Higgs boson couplings at $H\gamma\gamma$ and $HZ\gamma$ vertices and the
relevant SM background events are generated in MadGraph, then passed through
Pythia 8 for parton showering and Delphes to include detector effects. After
detailed examination of kinematic variables, we use invariant mass distribution
of two leading photons with optimized kinematic cuts to obtain constraints on
the Wilson coefficients of dimensionsix operators. We report that limits at
95\% confidence level on $\bar{c}_{\gamma}$ and $\tilde{c}_{\gamma}$ couplings
with an integrated luminosity of 10 ab$^{1}$ are [0.0041; 0.0019] and
[0.0027; 0.0027], respectively.

Threshold effects in heavy quarkonium spectroscopy. (arXiv:1902.02835v2 [hepph] UPDATED)
Authors: J. Ferretti
In this contribution, we discuss the possible importance of
continuumcoupling (or threshold) effects in heavy quarkonium spectroscopy. Our
calculations are carried out in a coupledchannel model, where mesonmeson
higher Fock (or moleculartype) components are introduced in $Q \bar Q$ bare
meson wave functions by means of a paircreation mechanism. After providing a
quick resume of the main characteristics of the coupledchannel model, we
briefly discuss its application to the calculation of the masses of heavy
quarkoniumlike $\chi_{\rm c}(2P)$ and $\chi_{\rm b}(3P)$ states with threshold
corrections. We show that the introduction of paircreation effects in the
Quark Model (QM) formalism makes it possible to explain the deviations of
$\chi_{\rm c}(2P)$ states' masses from the experimental data, without affecting
the good QM description of the properties of $\chi_{\rm b}(3P)$ states.

The Radial Acceleration Relation (RAR): the crucial cases of Dwarf Discs and of Low Surface Brightness galaxies. (arXiv:1810.08472v2 [astroph.GA] CROSS LISTED)
Authors: Chiara Di Paolo, Paolo Salucci, Jean Philippe Fontaine
McGaugh et al. (2016) have found, in a large sample of disc systems, a tight
nonlinear relationship between the total radial accelerations $g$ and their
components $g_b$ arisen from the distribution of the baryonic matter
[McGaugh_2016]. Here, we investigate the existence of such relation in Dwarf
Disc Spirals and Low Surface Brightness galaxies on the basis of [Karukes_2017]
and [DiPaolo_2018]. We have accurate mass profiles for 36 Dwarf Disc Spirals
and 72 LSB galaxies. These galaxies have accelerations that cover the McGaugh
range but also reach out to one order of magnitude below the smallest
accelerations present in McGaugh et al. (2016) and span different Hubble Types.
We found, in our samples, that the $g$ vs $g_b$ relation has a very different
profile and also other intrinsic novel properties, among those, the dependence
on a second variable: the galactic radius, normalised to the optical radius
$R_{opt}$, at which the two accelerations are measured. We show that the new
far than trivial $g$ vs $(g_b, r/R_{opt})$ relationship is nothing else than a
direct consequence of the complex, but coordinated mass distributions of the
baryons and the dark matter (DM) in disc systems. Our analysis shows that the
McGaugh et al. (2016) relation is a limiting case of a new universal relation
that can be very well framed in the standard "DM halo in the Newtonian Gravity"
paradigm.
