
Thermal Dark Matter Through the Dirac Neutrino Portal. (arXiv:1709.07001v1 [hepph])
Authors: Brian Batell, Tao Han, David McKeen, Barmak Shams Es Haghi
We study a simple model of thermal dark matter annihilating to standard model
neutrinos via the neutrino portal. A (pseudo)Dirac sterile neutrino serves as
a mediator between the visible and the dark sectors, while an approximate
lepton number symmetry allows for a large neutrino Yukawa coupling and, in
turn, efficient dark matter annihilation. The dark sector consists of two
particles, a Dirac fermion and complex scalar, charged under a symmetry that
ensures the stability of the dark matter. A generic prediction of the model is
a sterile neutrino with a large activesterile mixing angle that decays
primarily invisibly. We derive existing constraints and future projections from
direct detection experiments, colliders, rare meson and tau decays, electroweak
precision tests, and small scale structure observations. Along with these
phenomenological tests, we investigate the consequences of perturbativity and
scalar mass fine tuning on the model parameter space. A simple, conservative
scheme to confront the various tests with the thermal relic target is outlined,
and we demonstrate that much of the cosmologicallymotivated parameter space is
already constrained. We also identify new probes of this scenario such as
multibody kaon decays and DrellYan production of $W$ bosons at the LHC.

Hidden Sector Dark Matter and the Galactic Center GammaRay Excess: A Closer Look. (arXiv:1709.07002v1 [hepph])
Authors: Miguel Escudero, Samuel J. Witte, Dan Hooper
Stringent constraints from direct detection experiments and the Large Hadron
Collider motivate us to consider models in which the dark matter does not
directly couple to the Standard Model, but that instead annihilates into hidden
sector particles which ultimately decay through small couplings to the Standard
Model. We calculate the gammaray emission generated within the context of
several such hidden sector models, including those in which the hidden sector
couples to the Standard Model through the vector portal (kinetic mixing with
Standard Model hypercharge), through the Higgs portal (mixing with the Standard
Model Higgs boson), or both. In each case, we identify broad regions of
parameter space in which the observed spectrum and intensity of the Galactic
Center gammaray excess can easily be accommodated, while providing an
acceptable thermal relic abundance and remaining consistent with all current
constraints. We also point out that cosmicray antiproton measurements could
potentially discriminate some hidden sector models from more conventional dark
matter scenarios.

The Minimal Flavour Violating Axion. (arXiv:1709.07039v1 [hepph])
Authors: F. AriasAragon, L. Merlo
The solution to the Strong CP problem is analysed within the Minimal Flavour
Violation (MFV) context. An Abelian factor of the complete flavour symmetry of
the fermionic kinetic terms may play the role of the PecceiQuinn symmetry in
traditional axion models. Its spontaneous breaking, due to the addition of a
complex scalar field to the Standard Model scalar spectrum, generates the MFV
axion, which may redefine away the QCD theta parameter. It differs from the
traditional QCD axion for its couplings that are governed by the fermion
charges under the axial Abelian symmetry. It is also distinct from the
socalled Axiflavon, as the MFV axion does not describe flavour violation,
while it does induce flavour nonuniversality effects. The MFV axion
phenomenology is discussed considering astrophysical, collider and flavour
data.

Methods for deriving functional equations for Feynman integrals. (arXiv:1709.07058v1 [hepph])
Authors: O. V. Tarasov
We present short review of two methods for obtaining functional equations for
Feynman integrals. Application of these methods for finding functional
equations for one and two loop integrals is described in detail. It is shown
that with the aid of functional equations Feynman integrals in general
kinematics can be expressed in terms of simpler integrals. Similarities between
functional equations for Feynman integrals and addition theorem for Abel
integrals are shortly discussed.

Search for Nonstandard Neutrino Interactions with IceCube DeepCore. (arXiv:1709.07079v1 [hepex])
Authors: IceCube Collaboration: M. G. Aartsen, M. Ackermann, J. Adams, J. A. Aguilar, M. Ahlers, M. Ahrens, I. Al Samarai, D. Altmann, K. Andeen, T. Anderson, I. Ansseau, G. Anton, C. Argüelles, J. Auffenberg, S. Axani, H. Bagherpour, X. Bai, J. P. Barron, S. W. Barwick, V. Baum, R. Bay, J. J. Beatty, J. Becker Tjus, K.H. Becker, S. BenZvi, D. Berley, E. Bernardini, D. Z. Besson, G. Binder, D. Bindig, E. Blaufuss, S. Blot, C. Bohm, M. Börner, F. Bos, D. Bose, S. Böser, O. Botner, E. Bourbeau, J. Bourbeau, F. Bradascio, J. Braun, L. Brayeur, M. Brenzke, H.P. Bretz, S. Bron, J. BrosteanKaiser, A. Burgman, T. Carver, J. Casey, M. Casier, E. Cheung, D. Chirkin, A. Christov, K. Clark, L. Classen, S. Coenders, G. H. Collin, J. M. Conrad, D. F. Cowen, R. Cross, M. Day, J. P. A. M. de André, et al. (257 additional authors not shown)
As atmospheric neutrinos propagate through the Earth, vacuumlike
oscillations are modified by StandardModel neutral and chargedcurrent
interactions with electrons. Theories beyond the Standard Model introduce
heavy, TeVscale bosons that can produce nonstandard neutrino interactions.
These additional interactions may modify the Standard Model matter effect
producing a measurable deviation from the prediction for atmospheric neutrino
oscillations. The result described in this paper constrains nonstandard
interaction parameters, building upon a previous analysis of atmospheric
muonneutrino disappearance with three years of IceCubeDeepCore data. The best
fit for the muon to tau flavor changing term is $\epsilon_{\mu \tau}=0.0005$,
with a 90\% C.L. allowed range of $0.0067 <\epsilon_{\mu \tau}< 0.0081$. This
result is more restrictive than recent limits from other experiments for
$\epsilon_{\mu \tau}$. Furthermore, our result is complementary to a recent
constraint on $\epsilon_{\mu \tau}$ using another publicly available IceCube
highenergy event selection. Together, they constitute the world's best limits
on nonstandard interactions in the $\mu\tau$ sector.

Axion as a nonWIMP dark matter candidate. (arXiv:1709.07091v1 [hepph])
Authors: Ken'ichi Saikawa
The axion arises in wellmotivated extensions of the Standard Model of
particle physics and is regarded as an alternative to the weakly interacting
massive particle paradigm to explain the nature of dark matter. In this
contribution, we review theoretical aspects of dark matter axions, particularly
focusing on recent developments in the estimation of their relic abundance. A
closer look at their nonthermal production mechanisms in the early universe
reveals the possibility of explaining the observed dark matter abundance in
various mass ranges. The mass ranges predicted in various cosmological
scenarios are briefly summarized.

LHC limits on axionlike particles from heavyion collisions. (arXiv:1709.07110v1 [hepph])
Authors: Simon Knapen, Tongyan Lin, Hou Keong Lou, Tom Melia
In these proceedings we use recent LHC heavyion data to set a limit on
axionlike particles coupling to electromagnetism with mass in the range 10100
GeV. We recast ATLAS data as per the strategy proposed in 1607.06083, and find
results inline with the projections given there.

The $B \to \pi K$ Puzzle Revisited. (arXiv:1709.07142v1 [hepph])
Authors: Nicolas Boisvert Beaudry, Alakabha Datta, David London, Ahmed Rashed, JeanSamuel Roux
For a number of years, there has been a certain inconsistency among the
measurements of the branching ratios and CP asymmetries of the four $B \to \pi
K$ decays ($B^+ \to \pi^+ K^0$, $B^+ \to \pi^0 K^+$, $B^0 \to \pi^ K^+$, $B^0
\to \pi^0 K^0$). In this paper, we reexamine this $B \to \pi K$ puzzle. We
find that the key unknown parameter is $C'/T'$, the ratio of colorsuppressed
and colorallowed tree amplitudes. If this ratio is large, $C'/T' = 0.5$, the
SM can explain the data. But if it is small, $C'/T' = 0.2$, the SM cannot
explain the $B \to \pi K$ puzzle  new physics (NP) is needed. The two types
of NP that can contribute to $B \to \pi K$ at tree level are $Z'$ bosons and
diquarks. $Z'$ models can explain the puzzle if the $Z'$ couples to
righthanded $u{\bar u}$ and/or $d{\bar d}$, with $g_R^{dd} \ne g_R^{uu}$.
Interestingly, half of the many $Z'$ models proposed to explain the present
anomalies in $b \to s \mu^+ \mu^$ decays have the required $Z'$ couplings to
$u{\bar u}$ and/or $d{\bar d}$. Such models could potentially explain both the
$b \to s \mu^+ \mu^$ anomalies and the $B \to \pi K$ puzzle. The addition of a
color sextet diquark that couples to $ud$ can also explain the puzzle.

Reggelike relation and universal description of heavylight systems. (arXiv:1709.07196v1 [hepph])
Authors: Kan Chen, Yubing Dong, Xiang Liu, QiFang Lü, Takayuki Matsuki
Using the Reggelike formula $(Mm_Q)^2=\pi\sigma L$ between hadron mass $M$
and angular momentum $L$ with a heavy quark mass $m_Q$ and a string tension
$\sigma$, we analyze all the heavylight systems, i.e., $D/D_s/B/B_s$ mesons
and charmed and bottom baryons. Numerical plots are obtained for all the
heavylight mesons of experimental data whose slope becomes nearly equal to 1/2
of that for light hadrons. Assuming that charmed and bottom baryons consist of
one heavy quark and one light cluster of two light quarks (diquark), we apply
the formula to all the heavylight baryons including recently discovered
$\Omega_c$'s and find that all the heavylight baryons experimentally measured
satisfy the above formula. We predict the average mass values of $B$, $B_s$,
$\Lambda_b$, $\Sigma_c$, $\Xi_c$, and $\Omega_c$ with $L=2$ as 6.009, 6.129,
6.145, 3.053, 3.068, and 3.338 GeV, respectively. Our results on baryons
suggest that these baryons can be safely regarded as heavy quarklight cluster
configuration. We also find a universal description for all the heavylight
mesons as well as baryons, i.e., one unique line is enough to describe both of
charmed and bottom heavylight systems.

Implication of Quadratic Divergences Cancellation in the Two Higgs Doublet Model. (arXiv:1709.07219v1 [hepph])
Authors: Neda Darvishi, Maria Krawczyk
With the aim of exploring the Higgs sector of the Two Higgs Doublet Model
(2HDM), we have chosen the exact and soft $Z_2$ symmetry breaking versions of
the 2HDM with nonzero vacuum expectation values for both Higgs doublets (Mixed
Model). We consider two SMlike scenarios: with 125 GeV $h$ and 125 GeV $H$. We
have applied the condition for cancellation of quadratic divergences in the
type II 2HDM in order to derive masses of the heavy scalars. Solutions of two
relevant conditions were found in the considered SMlike scenarios. After
applying the current LHC data for the observed 125 GeV Higgs boson, the
precision electroweak data test and lower limits on the mass of $H^+$, the
allowed region of parameters shrink strongly.

The hadronic interaction model SIBYLL 2.3c and Feynman scaling. (arXiv:1709.07227v1 [hepph])
Authors: Felix Riehn, Hans P. Dembinski, Ralph Engel, Anatoli Fedynitch, Thomas K. Gaisser, Todor Stanev
The Monte Carlo model Sibyll has been designed for efficient simulation of
hadronic multiparticle production up to the highest energies as needed for
interpreting cosmic ray measurements. For more than 15 years, version 2.1 of
Sibyll has been one of the standard models for air shower simulation. Motivated
by data of LHC and fixedtarget experiments and a better understanding of the
phenomenology of hadronic interactions, we have developed an improved version
of this model, version 2.3, which has been released in 2016. In this
contribution we present a revised version of this model, called Sibyll 2.3c,
that is further improved by adjusting particle production spectra to match the
expectation of Feynman scaling in the fragmentation region. After a brief
introduction to the changes implemented in Sibyll 2.3 and 2.3c with respect to
Sibyll 2.1, the current predictions of the model for the depth of shower
maximum, the number of muons at ground, and the energy spectrum of muons in
extensive air showers are presented.

Role of QCD compositeness in the production of scalar and tensor mesons through singlephoton annihilation $e^+ e^ \to \gamma^* \to \gamma S(T)$. (arXiv:1709.07234v1 [hepph])
Authors: Alexandr G. Chumakov, Thomas Gutsche, Valery E. Lyubovitskij, Ivan Schmidt
We study the exclusive production of scalar $S = 0^{++}$ and tensor $T =
2^{++}$ mesons through singlephoton annihilation $e^+ e^ \to \gamma^* \to
\gamma S(T)$. Using QCD compositeness of the involved hadrons considered as
quarkantiquark systems, the prediction for the scaling of the differential
cross sections of these processes is $d\sigma/dt \sim 1/s^3$ at large $s$. We
further derive the scaling of the $\gamma^\ast \to \gamma S$ and $\gamma^\ast
\to \gamma T$ transition form factors: $F_{\gamma^\ast\gamma S}(s) \sim 1/s$
and $F_{\gamma^\ast\gamma T}(s) \sim 1/s^2$. Results for the respective cross
sections of the scalar meson production are presented. Also we test a possible
tetraquark structure of the $f_0(980)$ and $a_0(980)$. When these states are
tetraquark systems of two tightly bound color diquarks, the corresponding
transition form factors and differential cross sections have the same falloffs
as in the case of quarkantiquark picture. For other tetraquark configurations
the transition form factors $F_{\gamma^\ast\gamma S(T)}(s)$ and the
differential cross section $d\sigma/dt$ have additional $1/s$ and $1/s^2$
falloffs, respectively.

The effect of profiling procedure on PDFs using LHCb data. (arXiv:1709.07247v1 [hepph])
Authors: A. Aleedaneshvar, Ali N. Khorramian
The heavyflavour production at forward rapidity in $pp$ collisions at the
LHC is a very useful tool to assess the gluon density at low momentum fraction
$x$. In this work, the impact of heavyflavour measurements of the LHCb at
centerofmass energy of $ \sqrt s= $7 TeV on parton distribution functions
(PDFs) is studied. To this aim, the normalised LHCb cross sections of charm and
beauty hadron production are included into two modern PDF sets CT14 and MMHT
using the PDF profiling procedure. It is illustrated that the LHCb data impose
tighter constraints on the gluon distributions at low $x$, down to $x \sim
10^{6}$, the region that is currently not covered by other experimental data
which CT14 and MMHT have used in their perturbative QCD fits. We also affirm
that the LHCb data will affect the MMHT gluon distribution more than the CT14
one, if they are included in their global analyses.

Determination of the strong coupling constant $\alpha_s(M_Z)$ in nexttonexttoleading order QCD using H1 jet cross section measurements. (arXiv:1709.07251v1 [hepex])
Authors: H1 collaboration: V. Andreev, A. Baghdasaryan, K. Begzsuren, A. Belousov, V. Bertone, A. Bolz, V. Boudry, G. Brandt, V. Brisson, D. Britzger, A. Buniatyan, A. Bylinkin, L. Bystritskaya, A.J. Campbell, K.B. Cantun Avila, K. Cerny, V. Chekelian, J.G. Contreras, J. Cvach, J. Currie, J.B. Dainton, K. Daum, C. Diaconu, M. Dobre, V. Dodonov, G. Eckerlin, S. Egli, E. Elsen, L. Favart, A. Fedotov, J. Feltesse, M. Fleischer, A. Fomenko, E. Gabathuler, J. Gayler, T. Gehrmann, S. Ghazaryan, L. Goerlich, N. Gogitidze, M. Gouzevitch, C. Grab, A. Grebenyuk, T. Greenshaw, G. Grindhammer, C. Gwenlan, D. Haidt, R.C.W. Henderson, J. Hladky, D. Hoffmann, R. Horisberger, T. Hreus, F. Huber, A. Huss, M. Jacquet, X. Janssen, A.W. Jung, H. Jung, M. Kapichine, J. Katzy, C. Kiesling, M. Klein, C. Kleinwort, R. Kogler, et al. (84 additional authors not shown)
The strong coupling constant $\alpha_s(M_Z)$ is determined from inclusive jet
and dijet cross sections in neutralcurrent deepinelastic $ep$ scattering
(DIS) measured at HERA by the H1 collaboration using nexttonexttoleading
order (NNLO) QCD predictions. The dependence of the NNLO predictions and of the
resulting value of $\alpha_s(M_Z)$ at the $Z$boson mass $m_Z$ are studied as a
function of the choice of the renormalisation and factorisation scales. Using
inclusive jet and dijet data together, the strong coupling constant is
determined to be $\alpha_s(M_Z)=0.1157\,(20)_{\rm exp}\,(29)_{\rm th}$.
Complementary, \asmz\ is determined together with parton distribution functions
of the proton (PDFs) from jet and inclusive DIS data measured by the H1
experiment. The value $\alpha_s(M_Z)=0.1142\,(28)_{\rm tot}$ obtained is
consistent with the determination from jet data alone. The impact of the jet
data on the PDFs is studied. The running of the strong coupling is tested at
different values of the renormalisation scale and the results are found to be
in agreement with expectations.

Upper bound on the Abelian gauge coupling from asymptotic safety. (arXiv:1709.07252v1 [hepth])
Authors: Astrid Eichhorn, Fleur Versteegen
We explore the impact of asymptotically safe quantum gravity on the Abelian
gauge coupling in a model including a charged scalar, confirming indications
that asymptotically safe quantum fluctuations of gravity could trigger a
powerlaw running towards a free fixed point for the gauge coupling above the
Planck scale. Simultaneously, quantum gravity fluctuations balance against
matter fluctuations to generate an interacting fixed point, which acts as a
boundary of the basin of attraction of the free fixed point. This enforces an
upper bound on the infrared value of the Abelian gauge coupling. In the regime
of gravity couplings which in our approximation also allows for a prediction of
the top quark and Higgs mass close to the experimental value [1], we obtain an
upper bound approximately 35% above the infrared value of the hypercharge
coupling in the Standard Model.

The $D\bar{D}^*$ interaction with isospin zero in an extended hidden gauge symmetry approach. (arXiv:1709.07263v1 [hepph])
Authors: BaoXi Sun, DaMing Wan, SiYu Zhao
The $D \bar{D}^*$ interaction via a $\rho$ or $\omega$ exchange is
constructed within an extended hidden gauge symmetry approach, where the
strange quark is replaced by the charm quark in the $SU(3)$ flavor space. With
this $D \bar{D}^*$ interaction, a resonance state slightly above the $D
\bar{D}^*$ threshold is generated dynamically in the isospin zero sector by
solving the BetheSalpeter equation in the coupledchannel approximation, which
might correspond to the $X(3872)$ particle announced by many collaborations.
This formulism is also used to study the $B \bar{B}^*$ interaction, and a
resonance state with isospin zero is generated dynamically, which has no
counterpart listed in the review of the Particle data group. Furthermore, the
one pion exchange between the $D$ meson and the $\bar{D}^*$ is analyzed
precisely, and we do not think the one pion exchange potential need to be
considered when the BetheSalpeter equation is solved.

Cold light dark matter in extended seesaw models. (arXiv:1709.07283v1 [hepph])
Authors: Sami Boulebnane, Julian Heeck, Anne Nguyen, Daniele Teresi
We present a thorough discussion of light dark matter produced via freezein
in twobody decays A > B DM. If A and B are quasidegenerate, the dark matter
particle has a cold spectrum even for subkeV masses. We show this explicitly
by calculating the transfer function that encodes the impact on structure
formation. As examples for this setup we study extended seesaw mechanisms with
a spontaneously broken global U(1) symmetry, such as the inverse seesaw. The
eVkeVscale pseudoGoldstone dark matter particle is then naturally produced
cold by the decays of the quasidegenerate righthanded neutrinos.

Bound on dissipative effects from semileptonic neutral Bmeson decays. (arXiv:1709.07313v1 [hepph])
Authors: F. Benatti, R. Floreanini, S. Marcantoni, P. Pinotti, K. Zimmermann
The semileptonic decay asymmetry $\mathcal{A}_{\Delta m}$ is studied within
the open quantum systems approach to the physics of the neutral meson
$B^0$$\overline{B^0}$ system: this extended treatment takes into account
possible nonstandard, dissipative effects induced by the presence of an
external environment. A bound on these effects is provided through the analysis
of available experimental data from the Belle Collaboration.

Momentum distribution of particles created in spacetimedependent colliding laser pulses. (arXiv:1709.07331v1 [hepph])
Authors: I. A. Aleksandrov, G. Plunien, V. M. Shabaev
We study the pairproduction process in the presence of two
counterpropagating linearly polarized short laser pulses. By means of a
nonperturbative technique, we take into account the full coordinate dependence
of the external field going beyond the dipole and standingwave approximations.
In particular, we analyze the momentum distribution of particles created. It is
demonstrated that the spatial variations of the laser pulses may play a crucial
role. The more accurate treatment reveals a number of prominent features: the
pairproduction probabilities become considerably smaller, the quantitative
behavior of the momentum spectra changes dramatically, and the pulse shape
effects become much less pronounced. The results of our study are expected to
be very important for future theoretical and experimental investigations.

The running coupling from gluon and ghost propagators in the Landau gauge: YangMills theories with adjoint fermions. (arXiv:1709.07367v1 [heplat])
Authors: Georg Bergner, Stefano Piemonte
NonAbelian gauge theories with fermions transforming in the adjoint
representation of the gauge group (AdjQCD) are a fundamental ingredient of many
models that describe the physics beyond the Standard Model. Two relevant
examples are N=1 Supersymmetric YangMills (SYM) theory and Minimal Walking
Technicolor, which are gauge theories coupled to one adjoint Majorana and two
adjoint Dirac fermions, respectively. While confinement is a property of N=1
SYM, Minimal Walking Technicolor is expected to be infrared conformal. We study
the propagators of ghost and gluon fields in the Landau gauge to compute the
running coupling in the MiniMom scheme. We analyze several different ensembles
of lattice Monte Carlo simulations for the SU(2) adjoint QCD with Nf=1/2, 1,
3/2, and 2 Dirac fermions. We show how the running of the coupling changes as
the number of interacting fermions is increased towards the conformal window.

On the precise determination of the Tsallis parameters in proton  proton collisions at LHC energies. (arXiv:1709.07376v1 [hepph])
Authors: T. Bhattacharyya, J. Cleymans, L. Marques, S. Mogliacci, M.W. Paradza
A detailed analysis is presented about the precise values of the Tsallis
parameters obtained in $pp$ collisions for identified particles, pions, kaons
and protons at the LHC at three beam energies $\sqrt{s} = 0.9, 2.72$ and $7$
TeV. Interpolated data at $\sqrt{s} = $ 5.02 TeV have also been included. It is
shown that the Tsallis formula provides very good fits to the $p_T$
distributions in $pp$ collisions at the LHC using three parameters $dN/dy$,
$T$ and $q$. However, the parameters $T$ and $q$ depend on the particle species
and are different for pions, kaons and protons. As a consequence there is no
$m_T$ scaling and also no universality of the parameters for different particle
species.

Dark Matter Annihilation into FourBody Final States and Implications for the AMS Antiproton Excess. (arXiv:1709.07410v1 [astroph.HE])
Authors: Steven J. Clark, Bhaskar Dutta, Louis E. Strigari
We consider dark matter annihilation into a general set of final states of
Standard Model particles, including twobody and fourbody final states that
result from the decay of intermediate states. For dark matter masses ~1010^5
GeV, we use updated data from Planck and from high gammaray experiments such
as FermiLAT, MAGIC, and VERITAS to constrain the annihilation cross section
for each final state. The Planck constraints are the most stringent over the
entire mass range for annihilation into light leptons, and the FermiLAT
constraints are the most stringent for fourbody final states up to masses
~10^4 GeV. We consider these constraints in light of the recent AMS antiproton
results, and show that for light mediators it is possible to explain the AMS
data with dark matter, and remain consistent with FermiLAT Inner Galaxy
measurements, for m_\chi ~ 60100 GeV mass dark matter and mediator masses
m_\phi / m_\chi ~< 1.

New low$Q^2$ measurements of the $\gamma^\ast N \to \Delta(1232)$ Coulomb quadrupole form factor, pion cloud parametrizations and Siegert's theorem. (arXiv:1709.07412v1 [hepph])
Authors: G. Ramalho
The novel measurements of the $\gamma^\ast N \to \Delta(1232)$ Coulomb
quadrupole form factor in the range $Q^2=0.04$0.13 GeV$^2$ changed the trend
of the previous data. With the new data the electric and Coulomb form factors
are both in remarkable agreement with estimates of the pion cloud contributions
to the quadrupole form factors at low $Q^2$. The pion cloud contributions to
the electric and Coulomb form factors can be parametrized by the relations $G_E
\propto G_{En}/\left(1 + \frac{Q^2}{2M_\Delta(M_\DeltaM)}\right)$ and $G_C
\propto G_{En}$, where $G_{En}$ is the neutron electric form factor, and $M$,
$M_\Delta$ are the nucleon and $\Delta$ masses, respectively. Those
parametrizations are in full agreement with Siegert's theorem, which states
that $G_E= \frac{M_\DeltaM}{2M_\Delta} G_C$ at the pseudothreshold, when
$Q^2=(M_\Delta M)^2$, and improve previous parametrizations. For this
agreement contributes also a small valence quark effects component estimated by
a covariant quark model. The combination of the new data with the new
parametrization for $G_E$ culminates an intense period of studying the
$\gamma^\ast N \to \Delta(1232)$ quadrupole form factors at low $Q^2$, with the
agreement between theory and data.

Global extraction of the partontokaon fragmentation functions at NLO in QCD. (arXiv:1709.07415v1 [hepph])
Authors: R. J. HernándezPinto, M. Epele, D. de Florian, R. Sassot, M. Stratmann
In this document, we present the global QCD analysis of partontokaon
fragmentation functions at nexttoleading order accuracy using the latest
experimental information on singleinclusive kaon production in
electronpositron annihilation, leptonnucleon deepinelastic scattering, and
protonproton collisions. An extended analysis of this work can be found in
Ref.[1].

A Comprehensive Renormalisation Group Analysis of the Littlest Seesaw Model. (arXiv:1709.07425v1 [hepph])
Authors: Tanja Geib, Stephen F. King
We present a comprehensive renormalisation group analysis of the Littlest
Seesaw model involving two righthanded neutrinos and a very constrained Dirac
neutrino Yukawa coupling matrix. We perform the first $\chi^2$ analysis of the
low energy masses and mixing angles, in the presence of renormalisation group
corrections, for various righthanded neutrino masses and mass orderings, both
with and without supersymmetry. We find that the atmospheric angle, which is
predicted to be near maximal in the absence of renormalisation group
corrections, may receive significant corrections for some nonsupersymmetric
cases, bringing it into close agreement with the current best fit value in the
first octant. By contrast, in the presence of supersymmetry, the
renormalisation group corrections are relatively small, and the prediction of a
near maximal atmospheric mixing angle is maintained, for the studied cases.
Forthcoming results from T2K and NOvA will decisively test these models at a
precision comparable to the renormalisation group corrections we have
calculated.

Implications of GW related searches for IceCube. (arXiv:1709.07430v1 [astroph.HE])
Authors: Krijn D. de Vries, Gwenhaël de Wasseige, JeanMarie Frère, Matthias Vereecken
At the beginning of 2016, LIGO reported the firstever direct detection of
gravitational waves. The measured signal was compatible with the merger of two
black holes of about 30 solar masses, releasing about 3 solar masses of energy
in gravitational waves. We consider the possible neutrino emission from a
binary black hole merger relative to the energy released in gravitational waves
and investigate the constraints coming from the nondetection of counterpart
neutrinos, focusing on IceCube and its energy range. The information from
searches for counterpart neutrinos is combined with the diffuse astrophysical
neutrino flux in order to put bounds on neutrino emission from binary black
hole mergers. Prospects for future LIGO observation runs are shown and compared
with model predictions.

Master integrals for the NNLO virtual corrections to $\mu e$ scattering in QED: the planar graphs. (arXiv:1709.07435v1 [hepph])
Authors: Pierpaolo Mastrolia, Massimo Passera, Amedeo Primo, Ulrich Schubert
We evaluate the master integrals for the twoloop, planar boxdiagrams
contributing to the elastic scattering of muons and electrons at
nexttonextto leadingorder in QED. We adopt the method of differential
equations and the Magnus exponential series to determine a canonical set of
integrals, finally expressed as a Taylor series around four spacetime
dimensions, with coefficients written as combination of generalised
polylogarithms. The electron is treated as massless, while we retain full
dependence on the muon mass. The considered integrals are also relevant for
crossingrelated processes, such as dimuon production at $e^+ e^$colliders,
as well as for the QCD corrections to $top$pair production at hadron
colliders.

Safe SUSY. (arXiv:1709.07436v1 [hepth])
Authors: Borut Bajc, Nicola Andrea Dondi, Francesco Sannino
We investigate the short distance fate of distinct classes of not
asymptotically free supersymmetric gauge theories. Examples include super QCD
with two adjoint fields and generalised superpotentials, gauge theories without
superpotentials and with two types of matter representation and quiver
theories. We show that an asymptotically safe scenario is nonperturbatively
compatible with all known constraints.

Muonic hydrogen and the proton size. (arXiv:1709.07440v1 [hepph])
Authors: Wayne W. Repko, Duane A. Dicus
We reexamine the structure of the $n=2$ levels of muonic hydrogen using a
twobody potential that includes all relativistic and one loop corrections. The
potential was originally derived from QED to describe the muonium atom and
accounts for all contributions to order $\alpha^5$. Since one loop corrections
are included, the anomalous magnetic moment contributions of the muon can be
identified and replaced by the proton anomalous magnetic moment to describe
muonic hydrogen with a pointlike proton. This serves as a convenient starting
point to include the dominant electron vacuum polarization corrections to the
spectrum and extract the proton's mean squared radius $\langle r^2\rangle$. Our
results are consistent with other theoretical calculations that find that the
muonic hydrogen value for $\langle r^2\rangle$ is smaller than the result
obtained from electron scattering.

Baryogenesis in false vacuum. (arXiv:1605.06897v4 [hepph] UPDATED)
Authors: Yuta Hamada, Masatoshi Yamada
The null result in the LHC may indicate that the standard model is not
drastically modified up to very high scales such as the GUT/string scale.
Having this in the mind, we suggest a novel leptogenesis scenario realized in
the false vacuum of the Higgs field. If the Higgs field develops a large vacuum
expectation value in the early universe, a lepton number violating process is
enhanced, which we use for baryogenesis. To demonstrate the scenario, several
models are discussed. For example, we show that the observed baryon asymmetry
is successfully generated in the standard model with higherdimensional
operators.

BFKL phenomenology: resummation of highenergy logs in semihard processes at LHC. (arXiv:1606.07327v3 [hepph] UPDATED)
Authors: Francesco Giovanni Celiberto
A study of differential cross sections and azimuthal observables for
semihard processes at LHC energies, including BFKL resummation effects, is
presented. Particular attention has been paid to the behaviour of the azimuthal
correlation momenta, when a couple of forward/backward jets or identified
hadrons is produced in the final state with a large rapidity separation. Three
and four jet production has been also considered, the main focus lying on the
definition of new, generalized azimuthal observables, whose dependence on the
transverse momenta and the rapidities of the central jet(s) can be considered
as a distinct signal of the onset of BFKL dynamics.

Searching for Dark Absorption with Direct Detection Experiments. (arXiv:1608.02123v3 [hepph] UPDATED)
Authors: Itay M. Bloch, Rouven Essig, Kohsaku Tobioka, Tomer Volansky, TienTien Yu
We consider the absorption by bound electrons of dark matter in the form of
dark photons and axionlike particles, as well as of dark photons from the Sun,
in current and nextgeneration direct detection experiments. Experiments
sensitive to electron recoils can detect such particles with masses between a
few eV to more than 10 keV. For dark photon dark matter, we update a previous
bound based on XENON10 data and derive new bounds based on data from XENON100
and CDMSlite. We find these experiments to disfavor previously allowed
parameter space. Moreover, we derive sensitivity projections for SuperCDMS at
SNOLAB for silicon and germanium targets, as well as for various possible
experiments with scintillating targets (cesium iodide, sodium iodide, and
gallium arsenide). The projected sensitivity can probe large new regions of
parameter space. For axionlike particles, the same current direction detection
data improves on previously known directdetection constraints but does not
bound new parameter space beyond known stellar cooling bounds. However,
projected sensitivities of the upcoming SuperCDMS SNOLAB using germanium can go
beyond these and even probe parameter space consistent with possible hints from
the white dwarf luminosity function. We find similar results for dark photons
from the sun. For all cases, directdetection experiments can have
unprecedented sensitivity to darksector particles.

MultiBoson Interactions at the LHC. (arXiv:1610.07572v2 [hepex] UPDATED)
Authors: Daniel R. Green, Patrick Meade, MarcAndre Pleier
This review covers results on the production of all possible electroweak
boson pairs and 2to1 vector boson fusion at the CERN Large Hadron Collider
(LHC) in protonproton collisions at a center of mass energy of 7 and 8 TeV.
The data were taken between 2010 and 2012. Limits on anomalous triple gauge
couplings (aTGCs) then follow. In addition, data on electroweak triple gauge
boson production and 2to2 vector boson scattering yield limits on anomalous
quartic gauge boson couplings (aQGCs). The LHC hosts two general purpose
experiments, ATLAS and CMS, which have both reported limits on aTGCs and aQGCs
which are herein summarized. The interpretation of these limits in terms of an
effective field theory is reviewed, and recommendations are made for testing
other types of new physics using multigauge boson production.

A phenomenological study on the production of Higgs bosons in the cSMCS model at the LHC. (arXiv:1611.03312v2 [hepph] UPDATED)
Authors: Neda Darvishi, Mohammad Reza Masouminia
In the present work, we intend to predict the production rates of the Higgs
bosons in the simplest extension of the Standard Model (SM) by a neutral
complex singlet (cSMCS). This model has an additional source of CP violation
and provides strong enough firstorder electroweak phase transition to generate
the baryon asymmetry of universe (BAU). The scalar spectrum of the cSMCS
includes three neutral Higgs particles with the lightest one considered to be
the 125 GeV Higgs boson found at LHC. The SMlike Higgs boson comes mostly from
the SMlike SU(2) doublet, with a small correction from the singlet. To predict
the production rates of the Higgs bosons, we use a conventional effective LO
QCD framework and the unintegrated parton distribution functions (UPDF) of
KimberMartinRyskin (KMR). We first compute the SM Higgs production
crosssection and compare the results to the existing theoretical calculations
from different frameworks as well as the experimental data from the CMS and
ATLAS collaborations. It is shown that our framework is capable of producing
sound predictions for these highenergy QCD events in the SM. Afterwards we
present our predictions for the Higgs boson production in the cSMCS.

Prediction on the CP phases in Standard Model. (arXiv:1612.02891v4 [hepph] UPDATED)
Authors: Chilong Lin
In this article, a Yukawa coupling pattern in standard model is proposed and
diagonalized analytically. Unitary transformation matrices thus derived lead to
a CKM matrix with complex elements. However, the magnitudes of CKM elements
thus derived do not match empirical values perfectly at tree level.
Phenomenologically, several finetuning parameters are employed and that fits
all CKM elements with empirical values to ${\bf O}(10^{4})$. Furthermore, a
set of Yukawa coupling parameters are numerically achieved and thus,
CPviolating phases in $V_{CKM}$ are predicted.

Forward twophoton exchange in elastic leptonproton scattering and hyperfinesplitting correction. (arXiv:1701.05514v5 [hepph] UPDATED)
Authors: Oleksandr Tomalak
We relate the forward twophoton exchange (TPE) amplitudes to integrals of
the inclusive leptonproton scattering cross sections. These relations yield an
alternative way for the evaluation of the TPE correction to hyperfinesplitting
(HFS) in the hydrogenlike atoms with an equivalent to the standard approach
(Iddings, Drell and Sullivan) result implying the BurkhardtCottingham sum
rule. For evaluation of the individual effects (e.g., elastic contribution) our
approach yields a distinct result. We compare both methods numerically on
examples of the elastic contribution and the full TPE correction to HFS in
electronic and muonic hydrogen.

How light a higgsino or a wino dark matter can become in a compressed scenario of MSSM. (arXiv:1702.03954v2 [hepph] UPDATED)
Authors: Manimala Chakraborti, Utpal Chattopadhyay, Sujoy Poddar
Higgsinos and Wino have strong motivations for being Dark Matter (DM)
candidates in supersymmetry, but their annihilation cross sections are quite
large. For thermal generation and a single component DM setup the higgsinos or
wino may have masses of around 1 or 23 TeV respectively. For such DM
candidates, a small amount of slepton coannihilation may decrease the effective
DM annihilation cross section. This, in turn reduces the lower limit of the
relic density satisfied DM mass by more than 50%. Almost a similar degree of
reduction of the same limit is also seen for squark coannihilations. However,
on the contrary, for near degeneracy of squarks and higgsino DM, near its
generic upper limit, the associated coannihilations may decrease the relic
density, thus extending the upper limit towards higher DM masses. We also
compute the direct and indirect detection signals. Here, because of the
quasimass degeneracy of the squarks and the LSP, we come across a situation
where squark exchange diagrams may contribute significantly or more strongly
than the Higgs exchange contributions in the spinindependent direct detection
cross section of DM. For the higgsinoDM scenario, we observe that a DM mass of
600 GeV to be consistent with WMAP/PLANCK and LUX data for sfermion
coannihilations. The LUX data itself excludes the region of 450 to 600 GeV, by
a half order of magnitude of the crosssection, well below the associated
uncertainty. The similar combined lower limit for a wino DM is about 1.1 TeV.
There is hardly any collider bound from the LHC for squarks and sleptons in
such a compressed scenario where sfermion masses are close to the mass of a
higgsino/wino LSP.

Asymmetric thermalrelic dark matter: Sommerfeldenhanced freezeout, annihilation signals and unitarity bounds. (arXiv:1703.00478v2 [hepph] UPDATED)
Authors: Iason Baldes, Kalliopi Petraki
Dark matter that possesses a particleantiparticle asymmetry and has
thermalised in the early universe, requires a larger annihilation crosssection
compared to symmetric dark matter, in order to deplete the dark antiparticles
and account for the observed dark matter density. The annihilation
crosssection determines the residual symmetric component of dark matter, which
may give rise to annihilation signals during CMB and inside haloes today. We
consider dark matter with longrange interactions, in particular dark matter
coupled to a light vector or scalar force mediator. We compute the couplings
required to attain a final antiparticletoparticle ratio after the thermal
freezeout of the annihilation processes in the early universe, and then
estimate the latetime annihilation signals. We show that, due to the
Sommerfeld enhancement, highly asymmetric dark matter with longrange
interactions can have a significant annihilation rate, potentially larger than
symmetric dark matter of the same mass with contact interactions. We discuss
caveats in this estimation, relating to the formation of stable bound states.
Finally, we consider the nonrelativistic partialwave unitarity bound on the
inelastic crosssection, we discuss why it can be realised only by longrange
interactions, and showcase the importance of higher partial waves in this
regime of large inelasticity. We derive upper bounds on the mass of symmetric
and asymmetric thermalrelic dark matter for swave and pwave annihilation,
and exhibit how these bounds strengthen as the dark asymmetry increases.

ChargedHiggs on $R_{D^{(*)}}$, $\tau$ polarization, and FBA. (arXiv:1703.03646v2 [hepph] UPDATED)
Authors: ChuanHung Chen, Takaaki Nomura
We study the influence of a chargedHiggs on the excess of branching fraction
ratio, $R_M = BR(\bar B \to M \tau \bar\nu_\tau)/BR(\bar B \to M \ell \bar
\nu_\ell)$ $(M=D, D^*)$, in a generic twoHiggsdoublet model. In order to
investigate the lepton polarization, the detailed decay amplitudes with lepton
helicity are given. When the chargedHiggs is used to resolve excesses, it is
found that two independent Yukawa couplings are needed to explain the $R_D$ and
$R_{D^*}$ anomalies. We show that when the upper limit of $BR(B_c \to \tau \bar
\nu_\tau)<30\%$ is included, $R_D$ can be significantly enhanced while
$R_{D^*}<0.27$. With the $BR(B_c\to \tau \bar \nu_\tau)$ constraint, we find
that the $\tau$lepton polarizations can be still affected by the chargedHiggs
effects, where the standard model (SM) predictions are obtained as: $P^\tau_{D}
\approx 0.324$ and $P^\tau_{D^*}\approx 0.500$, and they can be enhanced to be
$P^\tau_{D} \approx 0.5$ and $P^\tau_{D^*} \approx 0.41$ by the chargedHiggs.
The integrated lepton frowardbackward asymmetry (FBA) is also studied, where
the SM result is $\bar A^{D^{(*)},\tau}_{FB} \approx 0.359(0.064)$, and they
can be enhanced (decreased) to be $\bar A^{D^{(*)},\tau}_{FB} \approx 0.33
(0.02)$.

The Neutrino Option. (arXiv:1703.10924v2 [hepph] UPDATED)
Authors: llaria Brivio, Michael Trott
The minimal seesaw scenario can radiatively generate the Higgs potential to
induce electroweak symmetry breaking while supplying an origin of the Higgs
vacuum expectation value from an underlying Majorana scale. If the Higgs
potential and (derived) electroweak scale have this origin, the heavy $\rm
SU(3) \times SU(2) \times U(1)_Y$ singlet states are expected to reside at $m_N
\sim 10500 \, {\rm PeV} $ for couplings $\omega \sim 10^{4.5}10^{6}$
between the Majorana sector and the Standard Model. In this framework, the
challenge of the electroweak scale hierarchy problem is replaced with a need to
generate or accommodate PeV Majorana mass scales in ultraviolet models; the
usual hierarchy problem is absent as the electroweak scale is not a fundamental
scale.

A global view on the Higgs selfcoupling. (arXiv:1704.01953v2 [hepph] UPDATED)
Authors: Stefano Di Vita, Christophe Grojean, Giuliano Panico, Marc Riembau, Thibaud Vantalon
The Higgs selfcoupling is notoriously intangible at the LHC. It was recently
proposed to probe the trilinear Higgs interaction through its radiative
corrections to singleHiggs processes. This approach however requires to
disentangle these effects from those associated to deviations of other
Higgscouplings to fermions and gauge bosons. We show that a global fit
exploiting only singleHiggs inclusive data suffers from degeneracies that
prevent one from extracting robust bounds on each individual coupling. We show
how the inclusion of doubleHiggs production via gluon fusion, and the use of
differential measurements in the associated singleHiggs production channels
WH, ZH and ttH, can help to overcome the deficiencies of a global
Higgscouplings fit. In particular, we bound the variations of the Higgs
trilinear selfcoupling relative to its SM value to the interval [0.1, 2.3] at
68% confidence level at the highluminosity LHC, and we discuss the robustness
of our results against various assumptions on the experimental uncertainties
and the underlying new physics dynamics. We also study how to obtain a
parametrically enhanced deviation of the Higgs selfcouplings and we estimate
how large this deviation can be in a selfconsistent effective field theory
framework.

Wilsonian Dark Matter in String Derived $Z^\prime$ Model. (arXiv:1704.02579v2 [hepph] UPDATED)
Authors: L. Delle Rose, A.E. Faraggi, C. Marzo, J. Rizos
The dark matter issue is among the most perplexing in contemporary physics.
The problem is more enigmatic due to the wide range of possible solutions,
ranging from the ultralight to the supermassive. String theory gives rise to
plausible dark matter candidates due to the breaking of the nonAbelian Grand
Unified Theory (GUT) symmetries by Wilson lines. The physical spectrum then
contains states that do not satisfy the quantisation conditions of the unbroken
GUT symmetry. Given that the Standard Model states are identified with broken
GUT representations, and provided that any ensuing symmetry breaking is induced
by components of GUT states, leaves a remnant discrete symmetry that forbid the
decay of the Wilsonian states. A class of such states are obtained in a
heteroticstring derived $Z^\prime$ model. The model exploits the spinorvector
duality symmetry, observed in the fermionic $Z_2\times Z_2$ heteroticstring
orbifolds, to generate a $Z^\prime\in E_6$ symmetry that may remain unbroken
down to low energies. The $E_6$ symmetry is broken at the string level with
discrete Wilson lines. The Wilsonian dark matter candidates in the string
derived model are $SO(10)$, and hence Standard Model, singlets and possess
non$E_6$ $U(1)_{Z^\prime}$ charges. Depending on the $U(1)_{Z^\prime}$
breaking scale and the reheating temperature they give rise to different
scenarios for the relic abundance, and in accordance with the cosmological
constraints.

AxionLike Particles and Recent Observations of the Cosmic Infrared Background Radiation. (arXiv:1704.05189v2 [hepph] UPDATED)
Authors: Kazunori Kohri, Hideo Kodama
The CIBER collaboration released their first observational data of the Cosmic
IR background (CIB) radiation, which has significant excesses at around the
wavelength $\sim$ 1 $\mu$m compared to theoreticallyinferred values. The
amount of the CIB radiation has a significant influence on the opaqueness of
the Universe for TeV gammarays emitted from distant sources such as AGNs. With
the value of CIB radiation reported by the CIBER experiment, through the
reaction of such TeV gammarays with the CIB photons, the TeV gammarays should
be significantly attenuated during propagation, which would lead to energy
spectra in disagreement with current observations of TeV gamma ray sources. In
this article, we discuss a possible resolution of this tension between the TeV
gammaray observations and the CIB data in terms of axion [or AxionLike
Particles (ALPs)] that may increase the transparency of the Universe by the
anomalyinduced photonaxion mixing. We find a region in the parameter space of
the axion mass, $m_a \sim 7 \times 10^{10}  5 \times 10^{8}$eV, and the
axionphoton coupling constant, $1.2 \times 10^{11} {\rm GeV}^{1} \lesssim
g_{a\gamma} \lesssim 8.8 \times 10^{10} {\rm GeV}^{1}$ that solves this
problem.

Laminar and turbulent dynamos in chiral magnetohydrodynamicsI: Theory. (arXiv:1705.00378v3 [physics.plasmph] UPDATED)
Authors: I. Rogachevskii, O. Ruchayskiy, A. Boyarsky, J. Fröhlich, N. Kleeorin, A. Brandenburg, J. Schober
The magnetohydrodynamic (MHD) description of plasmas with relativistic
particles necessarily includes an additional new field, the chiral chemical
potential associated with the axial charge (i.e., the number difference between
right and lefthanded relativistic fermions). This chiral chemical potential
gives rise to a contribution to the electric current density of the plasma
(\emph{chiral magnetic effect}). We present a selfconsistent treatment of the
\emph{chiral MHD equations}, which include the backreaction of the magnetic
field on a chiral chemical potential and its interaction with the plasma
velocity field. A number of novel phenomena are exhibited. First, we show that
the chiral magnetic effect decreases the frequency of the Alfv\'{e}n wave for
incompressible flows, increases the frequencies of the Alfv\'{e}n wave and of
the fast magnetosonic wave for compressible flows, and decreases the frequency
of the slow magnetosonic wave. Second, we show that, in addition to the
wellknown laminar chiral dynamo effect, which is not related to fluid motions,
there is a dynamo caused by the joint action of velocity shear and chiral
magnetic effect. In the presence of turbulence with vanishing mean kinetic
helicity, the derived meanfield chiral MHD equations describe turbulent
largescale dynamos caused by the chiral alpha effect, which is dominant for
large fluid and magnetic Reynolds numbers. The chiral alpha effect is due to an
interaction of the chiral magnetic effect and fluctuations of the smallscale
current produced by tangling magnetic fluctuations (which are generated by
tangling of the largescale magnetic field by sheared velocity fluctuations).
These dynamo effects may have interesting consequences in the dynamics of the
early universe, neutron stars, and the quarkgluon plasma.

Extracting dark matter signatures from atomic clock stability measurements. (arXiv:1705.05833v2 [hepph] UPDATED)
Authors: Tigran Kalaydzhyan, Nan Yu
We analyze possible effects of the dark matter environment on the atomic
clock stability measurements. The dark matter is assumed to exist in a form of
waves of ultralight scalar fields or in a form of topological defects
(monopoles and strings). We identify dark matter signal signatures in clock
Allan deviation plots that can be used to constrain the dark matter coupling to
the Standard Model fields. The existing data on the Al+/Hg+ clock comparison
are used to put new limits on the dilaton dark matter in the region of masses m
> 10^{15} eV. We also estimate the sensitivities of future atomic clock
experiments in space, including the cesium microwave and strontium optical
clocks aboard the International Space Station, as well as a potential nuclear
clock. These experiments are expected to put new limits on the topological dark
matter in the range of masses 10^{10} eV < m < 10^{6} eV.

The $H_0$ tension in light of vacuum dynamics in the Universe. (arXiv:1705.06723v4 [astroph.CO] UPDATED)
Authors: Joan Sola, Adria GomezValent, Javier de Cruz Perez
Despite the outstanding achievements of modern cosmology, the classical
dispute on the precise value of $H_0$, which is the first ever parameter of
modern cosmology and one of the prime parameters in the field, still goes on
and on after over half a century of measurements. Recently the dispute came to
the spotlight with renewed strength owing to the significant tension (at
$>3\sigma$ c.l.) between the latest Planck determination obtained from the CMB
anisotropies and the local (distance ladder) measurement from the Hubble Space
Telescope (HST), based on Cepheids. In this work, we investigate the impact of
the running vacuum model (RVM) and related models on such a controversy. For
the RVM, the vacuum energy density $\rho_{\Lambda}$ carries a mild dependence
on the cosmic expansion rate, i.e. $\rho_{\Lambda}(H)$, which allows to
ameliorate the fit quality to the overall $SNIa+BAO+H(z)+LSS+CMB$ cosmological
observations as compared to the concordance $\Lambda$CDM model. By letting the
RVM to deviate from the vacuum option, the equation of state $w=1$ continues
to be favored by the overall fit. Vacuum dynamics also predicts the following:
i) the CMB range of values for $H_0$ is more favored than the local ones, and
ii) smaller values for $\sigma_8(0)$. As a result, a better account for the LSS
structure formation data is achieved as compared to the $\Lambda$CDM, which is
based on a rigid (i.e. nondynamical) $\Lambda$ term.

Preinflationary universe in loop quantum cosmology. (arXiv:1705.07544v3 [grqc] UPDATED)
Authors: Tao Zhu, Anzhong Wang, Gerald Cleaver, Klaus Kirsten, Qin Sheng
The evolutions of the flat FLRW universe and its linear perturbations are
studied systematically in the dressed metric approach of LQC. When it is
dominated by the kinetic energy of the inflaton at the quantum bounce, the
evolution of the background can be divided into three different phases prior to
the preheating, {\em bouncing, transition and slowroll inflation}. During the
bouncing phase, the evolution is independent of not only the initial
conditions, but also the inflationary potentials. In particular, the expansion
factor can be well described by the same exact solution in all the cases
considered. In contrast, in the potential dominated case such a universality is
lost. It is because of this universality that the linear perturbations are also
independent of the inflationary models and obtained exactly. During the
transition phase, the evolutions of the background and its linear perturbations
are found explicitly, and then matched to the ones given in the other two
phases. Hence, once the initial conditions are imposed, the linear scalar and
tensor perturbations will be uniquely determined. Considering two different
sets of initial conditions, one imposed during the contracting phase and the
other at the bounce, we calculate the Bogoliubov coefficients and find that the
two sets yield the same results and all lead to particle creations at the onset
of the inflation. Due to the preinflationary dynamics, the scalar and tensor
power spectra become scaledependent. Comparing with the Planck 2015 data, we
find constraints on the total efolds that the universe must have expanded
since the bounce, in order to be consistent with current observations.

Sensitivity of the Cherenkov Telescope Array to the detection of a dark matter signal in comparison to direct detection and collider experiments. (arXiv:1706.01505v3 [astroph.HE] UPDATED)
Authors: Csaba Balázs, Jan Conrad, Ben Farmer, Thomas Jacques, Tong Li, Manuel Meyer, Farinaldo S. Queiroz, Miguel A. SánchezConde
Imaging atmospheric Cherenkov telescopes (IACTs) that are sensitive to
potential $\gamma$ray signals from dark matter (DM) annihilation above
$\sim50$ GeV will soon be superseded by the Cherenkov Telescope Array (CTA).
CTA will have a point source sensitivity an order of magnitude better than
currently operating IACTs and will cover a broad energy range between 20 GeV
and 300 TeV. Using effective field theory and simplified models to calculate
$\gamma$ray spectra resulting from DM annihilation, we compare the prospects
to constrain such models with CTA observations of the Galactic center with
current and nearfuture measurements at the Large Hadron Collider (LHC) and
direct detection experiments. For DM annihilations via vector or pseudoscalar
couplings, CTA observations will be able to probe DM models out of reach of the
LHC, and, if DM is coupled to standard fermions by a pseudoscalar particle,
beyond the limits of current direct detection experiments.

CP violating anomalous couplings in $W$ jet production at the LHC. (arXiv:1708.04402v2 [hepph] UPDATED)
Authors: Hai Tao Li, German Valencia
Todd correlations in $Wj$ production at the LHC have been studied recently
as a way to measure a phase produced by QCD at NLO by Frederix et. al. That
study found that the induced asymmetry could be observed with 20 fb$^{1}$ of 8
TeV data. These Todd asymmetries can also be induced by CP violating new
physics interfering with the SM at LO. In this paper we study this possibility
using effective Lagrangians to describe the new physics. We find that the
leading contribution arises at dimension eight, and that it necessarily
introduces flavor changing neutral currents as well. We discuss the constraints
that can be placed on the flavor structure of the new physics operator from
studies of FCNC in kaon and B meson decays and then compare the Todd
correlations in $Wj$ induced by CP violating new physics to those induced by
QCD at NLO. We quantify the level at which these couplings can be probed at the
LHC, and find that they will not affect a measurement of the NLO QCD phases.

Dependencies of Lepton Angular Distribution Coefficients on the Transverse Momentum and Rapidity of$Z$ Bosons Produced in $pp$ Collisions at LHC. (arXiv:1708.05807v2 [hepph] UPDATED)
Authors: WenChen Chang, Randall Evan McClellan, JenChieh Peng, Oleg Teryaev
High precision data of lepton angular distributions for $\gamma^*/Z$
production in $pp$ collisions at the LHC, covering broad ranges of dilepton
transverse momenta ($q_T$) and rapidity ($y$), were recently reported. Strong
$q_T$ dependencies were observed for several angular distribution coefficients,
$A_i$, including $A_0  A_4$. Significant $y$ dependencies were also found for
the coefficients $A_1$, $A_3$ and $A_4$, while $A_0$ and $A_2$ exhibit very
weak rapidity dependence. Using an intuitive geometric picture we show that the
$q_T$ and $y$ dependencies of the angular distributions coefficients can be
well described.

Dark Matter Results From 54TonDay Exposure of PandaXII Experiment. (arXiv:1708.06917v2 [astroph.CO] UPDATED)
Authors: PandaXII Collaboration: Xiangyi Cui, Abdusalam Abdukerim, Wei Chen, Xun Chen, Yunhua Chen, Binbin Dong, Deqing Fang, Changbo Fu, Karl Giboni, Franco Giuliani, Linhui Gu, Yikun Gu, Xuyuan Guo, Zhifan Guo, Ke Han, Changda He, Di Huang, Shengming He, Xingtao Huang, Zhou Huang, Xiangdong Ji, Yonglin Ju, Shaoli Li, Yao Li, Heng Lin, Huaxuan Liu, Jianglai Liu, Yugang Ma, Yajun Mao, Kaixiang Ni, Jinhua Ning, Xiangxiang Ren, Fang Shi, Andi Tan, Cheng Wang, Hongwei Wang, Meng Wang, Qiuhong Wang, Siguang Wang, Xiuli Wang, Xuming Wang, Qinyu Wu, Shiyong Wu, Mengjiao Xiao, Pengwei Xie, Binbin Yan, Yong Yang, Jianfeng Yue, Dan Zhang, Hongguang Zhang, Tao Zhang, Tianqi Zhang, Li Zhao, Jifang Zhou, Ning Zhou, Xiaopeng Zhou
We report a new search of weakly interacting massive particles (WIMPs) using
the combined low background data sets in 2016 and 2017 from the PandaXII
experiment in China. The latest data set contains a new exposure of 77.1 live
day, with the background reduced to a level of 0.8$\times10^{3}$ evt/kg/day,
improved by a factor of 2.5 in comparison to the previous run in 2016. No
excess events were found above the expected background. With a total exposure
of 5.4$\times10^4$ kg day, the most stringent upper limit on spinindependent
WIMPnucleon cross section was set for a WIMP with mass larger than 100
GeV/c$^2$, with the lowest exclusion at 8.6$\times10^{47}$ cm$^2$ at 40
GeV/c$^2$.

Particle temperature and the Chiral Vortical Effect in the early universe. (arXiv:1709.00211v2 [hepph] UPDATED)
Authors: Tamal K. Mukherjee, Soma Sanyal
We study the effect of hotter or colder particles on the evolution of the
chiral magnetic field in the early universe. We are interested in the
temperature dependent term in the chiral vortical effect. There are no changes
in the magnetic energy spectrum at large lengthscales but in the Kolmogorov
regime we do find a difference. Our numerical results show that the Gaussian
peak in the magnetic spectrum becomes negatively skewed. The negatively skewed
peak can be fitted with a beta distribution. Analytically one can relate the
nonGaussianity of the distribution to the temperature dependent vorticity
term. The vorticity term is therefore responsible for the beta distribution in
the magnetic spectrum. Since the beta distribution has already been used to
model turbulent dispersion in fluids, hence it seems that the presence of
hotter or colder particles may lead to turbulence in the magnetized plasma.

Mass generation by a Lorentzinvariant gas of spacetime defects. (arXiv:1703.10585v3 [hepth] CROSS LISTED)
Authors: F.R. Klinkhamer, J.M. Queiruga
We present a simple model of defects embedded in flat spacetime, where the
model is designed to maintain Lorentz invariance over large length scales. Even
without remnant Lorentz violation, there are still effects from these spacetime
defects on the propagation of physical fields, notably mass generation for
scalars and Dirac fermions.

The Toric SO(10) FTheory Landscape. (arXiv:1709.06609v1 [hepth] CROSS LISTED)
Authors: Wilfried Buchmuller, Markus Dierigl, PaulKonstantin Oehlmann, Fabian Ruehle
Supergravity theories in more than four dimensions with grand unified gauge
symmetries are an important intermediate step towards the ultraviolet
completion of the Standard Model in string theory. Using toric geometry, we
classify and analyze sixdimensional Ftheory vacua with gauge group SO(10)
taking into account MordellWeil U(1) and discrete gauge factors. We determine
the full matter spectrum of these models, including charged and neutral SO(10)
singlets. Based solely on the geometry, we compute all matter multiplicities
and confirm the cancellation of gauge and gravitational anomalies independent
of the base space. Particular emphasis is put on symmetry enhancements at the
loci of matter fields and to the frequent appearance of superconformal points.
They are linked to nontoric K\"ahler deformations which contribute to the
counting of degrees of freedom. We compute the anomaly coefficients for these
theories as well by using a baseindependent blowup procedure and
superconformal matter transitions. Finally, we identify sixdimensional
supergravity models which can yield the Standard Model with highscale
supersymmetry by further compactification to four dimensions in an Abelian flux
background.
