Latest in hep-ph

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Hidden-charm pentaquarks and $P_c$ statesApr 22 2019Recently, the LHCb Collaboration reported three $P_c$ states in the ${J/\psi}p$ channel. We systematically study the mass spectrum of the hidden charm pentaquark in the framework of an extended chromomagnetic model. For the $nnnc\bar{c}$ pentaquark with ... More
SU(3) Polyakov Linear-Sigma Model With Finite Isospin Asymmetry: QCD Phase DiagramApr 22 2019The SU(3) Polyakov linear-sigma model (PLSM) in mean-field approximation is utilized in analyzing the chiral condensates $\sigma_u$, $\sigma_d$, $\sigma_s$ and the deconfinement order parameters $\phi$, $\bar{\phi}$, at finite isospin asymmetry. The bulk ... More
The Role of Lattice QCD in Searches for Violations of Fundamental Symmetries and Signals for New PhysicsApr 22 2019This document is one of a series of whitepapers from the USQCD collaboration. Here, we discuss opportunities for Lattice Quantum Chromodynamics (LQCD) in the research frontier in fundamental symmetries and signals for new physics. LQCD, in synergy with ... More
Interference effects for the top quark decays $t\to b+W^+/H^+(\toτ^+ν_τ)$Apr 21 2019Applying the narrow-width approximation (NWA), we first review the NLO QCD predictions for the total decay rate of top quark considering two unstable intermediate particles: the $W^+$-boson in the standard model (SM) of particle physics and the charged ... More
Hadrons and NucleiApr 20 2019This document is one of a series of whitepapers from the USQCD collaboration. Here, we discuss opportunities for lattice QCD calculations related to the structure and spectroscopy of hadrons and nuclei. An overview of recent lattice calculations of the ... More
Opportunities for lattice QCD in quark and lepton flavor physicsApr 20 2019This document is one of a series of whitepapers from the USQCD collaboration. Here, we discuss opportunities for lattice QCD in quark and lepton flavor physics. New data generated at Belle II, LHCb, BES III, NA62, KOTO, and Fermilab E989, combined with ... More
DarkHistory: A code package for calculating modified cosmic ionization and thermal histories with dark matter and other exotic energy injectionsApr 19 2019We present a new public Python package, DarkHistory, for computing the effects of dark matter annihilation and decay on the temperature and ionization history of the early universe. DarkHistory simultaneously solves for the evolution of the free electron ... More
Numerical analyses of N=2 supersymmetric quantum mechanics with cyclic Leibniz rule on latticeApr 19 2019We study a cyclic Leibniz rule, which provides a systematic approach to lattice supersymmetry, using a numerical method with a transfer matrix. The computation is carried out in N=2 supersymmetric quantum mechanics with the phi^6-interaction for weak ... More
Stable magnetic monopole in two Higgs doublet modelsApr 19 2019We show that a stable magnetic monopole with a finite mass can exist in two Higgs doublet models, contrary to the standard model. The monopole is attached by two topological $Z$ strings ($Z$ flux tubes) from both sides.Despite of a trivial second homotopy ... More
Ultra Light Boson Dark Matter and Event Horizon Telescope Observations of M87*Apr 19 2019The initial data from the Event Horizon Telescope (EHT) on M87$^*$, the supermassive black hole at the center of the M87 galaxy, provide direct observational information on its mass, spin, and accretion disk properties. A combination of the EHT data and ... More
Physics potential of the International Axion Observatory (IAXO)Apr 19 2019We review the physics potential of a next generation search for solar axions: the International Axion Observatory (IAXO). Endowed with a sensitivity to discover axion-like particles (ALPs) with a coupling to photons as small as $g_{a\gamma}\sim 10^{-12}$ ... More
The expectation of cosmic ray proton and helium energy spectrum below 4 PeV measured by LHAASOApr 19 2019Large High Altitude Air Shower Observatory(LHAASO) is a composite cosmic ray observatory consisting of three detector arrays: kilometer square array (KM2A) which includes the electromagnetic detector array and muon detector array, water Cherenkov detector ... More
On Itzykson-Zuber AnsatzApr 19 2019We apply the renormalized coupling constants and Virasoro constraints to derive the Itzykson-Zuber Ansatz on the form of the free energy in topological 2D gravity. We also treat the topological 1D gravity and the Hermitian one-matrix models in the same ... More
Efficient $2^3S$ positronium production by stimulated decay from the $3^3P$ levelApr 18 2019We investigate experimentally the possibility of enhancing the production of $2^3S$ positronium atoms by driving the $1^3S$-$3^3P$ and $3^3P$-$2^3S$ transitions, overcoming the natural branching ratio limitation of spontaneous decay from $3^3P$ to $2^3S$. ... More
Gravitational probes of ultra-light axionsApr 18 2019The axion is a hypothetical, well-motivated dark-matter particle whose existence would explain the lack of charge-parity violation in the strong interaction. In addition to this original motivation, an `axiverse' of ultra-light axions (ULAs) with masses ... More
Chiral perturbation theory in the environment with chiral imbalanceApr 18 2019We discuss the description of chiral imbalance imprint in pion matter. It is based on the Chiral Perturbation Theory supplemented by medium induced chiral chemical potential in the covariant derivative. Such an implementation of chiral imbalance recently ... More
FPGA-accelerated machine learning inference as a service for particle physics computingApr 18 2019Large-scale particle physics experiments face challenging demands for high-throughput computing resources both now and in the future. New heterogeneous computing paradigms on dedicated hardware with increased parallelization, such as Field Programmable ... More
Sub-GeV Dark Matter Searches and Electric Field Studies for the LUX and LZ ExperimentsApr 18 2019The nature of dark matter (DM) remains a mystery since it has so far eluded detection in the laboratory. To that end, the Large Underground Xenon (LUX) experiment was built to directly observe the interaction of DM with xenon target nuclei. LUX acquired ... More
The $x_i$-eigenvalue problem on some new fuzzy spheresApr 18 2019We study the eigenvalue equation for the 'Cartesian coordinates' observables $x_i$ on the fully $O(2)$-covariant fuzzy circle $\{S^1_\Lambda\}_{\Lambda\in\mathbb{N}}$ ($i=1,2$) and on the fully $O(3)$-covariant fuzzy 2-sphere $\{S^2_\Lambda\}_{\Lambda\in\mathbb{N}}$ ... More
Quark and Polyakov-loop correlations in the Polyakov-Nambu-Jona-Lasinio modelApr 18 2019The aim of this work is to shed light to some less known aspects of Polyakov-loop extended chiral models, especially on the correlation of the quark sector and the Polyakov loop. We show that the order of chiral and Polyakov-loop transition and their ... More
$H \rightarrow b\overline{b}j$ at Next-to-Next-to-Leading Order AccuracyApr 18 2019We present the calculation of the decay $H \rightarrow b\overline{b}j$ at next-to-next-to-leading order (NNLO) accuracy. We consider contributions in which the Higgs boson couples directly to bottom quarks, i.e. our predictions are accurate to order $\mathcal{O}(\alpha_s^3 ... More
N$^{3}$LO predictions for the decay of the Higgs boson to bottom quarksApr 18 2019We present a fully-differential calculation of the $H\rightarrow b\overline{b}$ decay at next-to-next- to-next-to-leading order (N$^3$LO) accuracy. Our calculation considers diagrams in which the Higgs boson couples directly to the bottom quarks, i.e. ... More
Cosmic-ray transport from AMS-02 B/C data: benchmark models and interpretationApr 18 2019This article aims at establishing new benchmark scenarios for Galactic cosmic-ray propagation in the GV-TV rigidity range, based on fits to the AMS-02 B/C data with the USINE v3.5 propagation code. We employ a new fitting procedure, cautiously taking ... More
Axion-Dilaton Destabilization and the Hubble TensionApr 18 2019The discrepancy in measurements of the Hubble constant indicates new physics in dark energy, dark matter, or both. Drawing inspiration from string theory, where axions interact with the other moduli fields, including the dilaton, here we demonstrate that ... More
The Polarized Two-Loop Massive Pure Singlet Wilson Coefficient for Deep-Inelastic ScatteringApr 18 2019We calculate the polarized massive two--loop pure singlet Wilson coefficient contributing to the structure functions $g_1(x,Q^2)$ analytically in the whole kinematic region. The Wilson coefficient contains Kummer--elliptic integrals. We derive the representation ... More
Identifying Higgsino-like neutralino with a keV-scale dark matterApr 18 2019The presence of a Higgsino-like neutralino NLSP and a keV scale gravitino ($\widetilde{G}$) LSP opens up new decay modes of the NLSP, mainly to a Higgs/$Z$ boson and the LSP. Besides, a keV-scale gravitino as a warm dark matter candidate salvages a relatively-light ... More
Strong dynamics with matter in multiple representations: SU(4) gauge theory with fundamental and sextet fermionsApr 18 2019We present a non-perturbative lattice study of SU(4) gauge theory with two flavors of fermions in the fundamental representation and two in the two-index antisymmetric representation: a theory closely related to a minimal partial-compositeness model for ... More
Nonlinear flavor development of a two-dimensional neutrino gasApr 18 2019We present a numerical survey of the nonlinear flavor development of dense neutrino gases. This study is based on the stationary, two-dimensional ($x$ and $z$), two-beam, monochromatic neutrino line model with a periodic boundary condition along the $x$ ... More
Proton decay in flux compactificationsApr 18 2019We study proton decay in a six-dimensional orbifold GUT model with gauge group $SO(10)\times U(1)_A$. Magnetic $U(1)_A$ flux in the compact dimensions determines the multiplicity of quark-lepton generations, and it also breaks supersymmetry by giving ... More
Resummation of soft and Coulomb corrections for $t\bar{t}h$ production at the LHCApr 18 2019In this paper, a combined resummation of soft and Coulomb corrections is performed for the associated production of the Higgs boson with a top quark pair at the LHC. We illustrate the similarities and critical differences between this process and the ... More
Light-meson leptonic decay rates in lattice QCD+QEDApr 18 2019The leading electromagnetic (e.m.) and strong isospin-breaking corrections to the $\pi^+ \to \mu^+ \nu[\gamma]$ and $K^+ \to \mu^+ \nu[\gamma]$ leptonic decay rates are evaluated for the first time on the lattice. The results are obtained using gauge ... More
$B$-hadron fragmentation functions at next-to-next-to-leading order from global analysis of $e^+e^-$ annihilation dataApr 18 2019We present nonperturbative fragmentation functions (FFs) for bottom-flavored ($B$) hadrons both at next-to-leading (NLO) and, for the first time, at next-to-next-to-leading order (NNLO) in the $\overline{\mathrm{MS}}$ factorization scheme with five massless ... More
Multigrid for Wilson Clover Fermions in GridApr 18 2019With the ever-growing number of computing architectures, performance portability is an important aspect of (Lattice QCD) software. The Grid library provides a good framework for writing such code, as it thoroughly separates hardware-specific code from ... More
Emergence of hydrodynamical behavior in expanding quark-gluon plasmasApr 18 2019We use a set of simple angular moments to solve the Boltzmann equation in the relaxation time approximation for a boost invariant longitudinally expanding gluonic plasma. The transition from the free streaming regime at early time to the hydrodynamic ... More
The Zilch Electromagnetic Conservation Law in Variational Characteristic FormApr 18 2019In this paper we consider the zilch conservation laws for Maxwell theory and demonstrate that in the duality-symmetric version of Maxwell theory, the zilch arises as a Noether current for a variational symmetry of the duality symmetric Lagrangian which ... More
Two-particle angular correlations in heavy ion collisions from a multiphase transport modelApr 18 2019We extend our earlier study on two-particle angular correlations in $pp$ collisions at low transverse momentum ($p_T$) to $p$-Pb, Pb-Pb and Au-Au collisions at RHIC and LHC energies. We mainly use the string melting version of a multiphase transport model ... More
Mean-field potential effects in the cumulants of baryons from central Au+Au collision at $E_{lab}$= 1.23 GeV$/$nucleonApr 18 2019The cumulants of baryon multiplicity distribution in relativistic heavy-ion collisions (HICs) have attracted considerable attention recently. It has been conjectured that they may serve as a promising observable to detect the critical end point in the ... More
Phase ambiguity of the measure for continuum Majorana fermionsApr 18 2019Integrating over a continuum Majorana fermion formally yields a functional pfaffian. We show that the phase of this pfaffian is ambiguous, as it depends on the choice of basis. This ambiguity is naturally resolved within a non-perturbative lattice definition, ... More
Gravitino condensate in $N=1$ supergravity coupled to the $N=1$ supersymmetric Born-Infeld theoryApr 18 2019The $N=1$ supersymmetric Born-Infeld theory coupled to $N=1$ supergravity in four spacetime dimensions is studied in the presence of a cosmological term with spontaneous supersymmetry breaking. The consistency is achieved by compensating a negative contribution ... More
Effective gauge theories of superfluidity with topological orderApr 18 2019We discuss the low-energy dynamics of superfluidity with topological order in $(3+1)$ spacetime dimensions. We generalize a topological $BF$ theory by introducing a non-square $K$ matrix, and this generalized $BF$ theory can describe massless Nambu-Goldstone ... More
The $φ(2170)$ production in the process $γp\to ηφp$Apr 18 2019We have studied the $\gamma p\to \eta \phi p$ reaction within the effective Lagrangian approach, by considering the contribution of the intermediate state $\phi(2170)$ production, and the background contributions of $t$-channel $\pi^0$ and $\eta$ mesons ... More
Vacuum Decay in Real Time and Imaginary Time FormalismsApr 18 2019We analyze vacuum tunneling in quantum field theory in a general formalism by using the Wigner representation. In the standard instanton formalism, one usually approximates the initial false vacuum state by an eigenstate of the field operator, imposes ... More
Portraying Double Higgs at the Large Hadron ColliderApr 18 2019We examine the discovery potential for double Higgs production at the high luminosity LHC in the final state with two $b$-tagged jets, two leptons and missing transverse momentum. Although this dilepton final state has been considered a difficult channel ... More
Discovering True Muonium at LHCbApr 17 2019We study the potential of the LHCb experiment to discover, for the first time, the $\mu^+\mu^-$ true muonium bound state. We propose a search for the vector $1^3S_1$ state, $\mathcal{T\!M}$, which kinetically mixes with the photon and dominantly decays ... More
No strong $CP$ violation up to the one-loop level in a two-Higgs-doublet modelApr 17 2019We put forward a two-Higgs-doublet model, furnished with a $Z_3$ symmetry, wherein $CP$ is conserved in the dimension-four terms of the Lagrangian and is softly broken in the scalar potential. The new particles of our model are one neutral scalar $H$, ... More
The holographic dual of Rényi relative entropyApr 17 2019The relative entropy is a measure of the distinguishability of two quantum states. A great deal of progress has been made in the study of the relative entropy between an excited state and the vacuum state of a conformal field theory (CFT) reduced to a ... More
Dark Matter Strikes Back at the Galactic CenterApr 17 2019Statistical evidence has previously suggested that the Galactic Center GeV Excess (GCE) originates largely from point sources, and not from annihilating dark matter. We examine the impact of unmodeled source populations on identifying the true origin ... More
The Weak Scale from Weak GravityApr 17 2019We explore the prospects for bounding the weak scale using the weak gravity conjecture (WGC), addressing the hierarchy problem by violating the expectations of effective field theory. Building on earlier work by Cheung and Remmen, we construct models ... More
Update on the b->s anomaliesApr 17 2019We present a brief update of our model-independent analyses of the b->s data presented in the articles published in Phys. Rev. D96 (2017) 095034 and Phys. Rev. D98 (2018) 095027 based on new data on R_K by LHCb, on R_{K^*} by Belle, and on B_{s,d}-> mu^+ ... More
Causality, unitarity thresholds, anomalous thresholds and infrared singularities from the loop-tree duality at higher ordersApr 17 2019We present the first comprehensive analysis of the unitarity thresholds and anomalous thresholds of scattering amplitudes at two loops and beyond based on the loop-tree duality, and show how non-causal unphysical thresholds are locally cancelled in an ... More
Preservation of no-signalling principle in parity-time symmetric quantum systemsApr 17 2019We look into the possibility of entanglement generation in a parity(P)-time(T)-symmetric framework and demonstrate the non-violation of non-signalling principle for the case of bipartite systems when at least one is guided by PT-symmetric quantum mechanics. ... More
Relaxing the $W'$ constraint on compactified extra-dimensionApr 17 2019It has been known for some time that the inclusion of brane fluctuations, namely branons, helps in the suppression of KK-mode couplings to brane localised matter fields. In this paper we study the constraint on brane tension and compactification scale ... More
Detection of Cosmic Rays from ground: an IntroductionApr 17 2019Cosmic rays are the most outstanding example of accelerated particles. They are about 1\% of the total mass of the Universe, so that cosmic rays would represent by far the most important energy transformation process of the Universe. Despite large progresses ... More
Axion superradiance in rotating neutron starsApr 17 2019It is a well-known fact that compact gravitating objects admit bound state configurations for massive bosonic fields. In this work we describe a new class of superradiant instabilities of axion bound states in neutron star magnetospheres. The instability ... More
Event-Based Transverse Momentum ResummationApr 17 2019We have developed a framework for automated transverse momentum resummation for arbitrary electroweak final states based on reweighting tree-level events. It is fully differential in the kinematics of the electroweak final states, which facilitates a ... More
Hadron-Deuteron Correlations and Production of Light Nuclei in Relativistic Heavy-Ion CollisionsApr 17 2019Production of light nuclei in relativistic heavy-ion collisions is well described by both the thermal model, where light nuclei are in equilibrium with all other hadron species present in a fireball, and the coalescence model, where light nuclei are formed ... More
The $χ_{cJ}$ decay to $φK^* \bar K, φh_1(1380)$ testing the nature of axial vector meson resonancesApr 17 2019We perform a theoretical study of the $\chi_{cJ} \to \phi K^* \bar K \to \phi K\pi \bar K$ reaction taking into account the $K^* \bar K$ final state interaction, which in the chiral unitary approach is responsible, together with its coupled channels, ... More
Lepton flavour universality violation in semileptonic tree level weak transitionsApr 17 2019The recent deviations of the experimental data on some parameters of the semileptonic $B$ and $B_c$ mesons decays from the standard model (SM) predictions indicate considerable violations of the lepton universality and as a result, possible new physics ... More
The analytic structure of thermodynamic systems with repulsive interactionsApr 17 2019Thermodynamic properties of systems with repulsive interactions, are considered in the grand canonical ensemble. The analytic structure of the excluded-volume model in the complex plane of the system chemical potential (fugacity) is elaborated, based ... More
Angular mode expansion of the Boltzmann equation in the small-angle approximationApr 17 2019We use an expansion in angular mode functions in order to solve the Boltzmann equation for a gluon plasma undergoing longitudinal expansion. By comparing with the exact solution obtained numerically by other means we show that the expansion in mode functions ... More
Probing 21cm cosmology and radiative neutrino decaysApr 17 2019Here we discuss the recent EDGES observation of a excess in its radio profile and how it can be used to constrain radiative neutrino decays.
Fitting B/C cosmic-ray data in the AMS-02 era: a cookbookApr 17 2019AMS-02 on the ISS has been releasing data of unprecedented accuracy. This poses new challenges for their interpretation. We refine the methodology to get a statistically sound determination of the cosmic-ray propagation parameters. We inspect the numerical ... More
A new perspective on galactic dynamicsApr 17 2019We derive the radial acceleration of stars in galaxies by using basic features of thermodynamics, statistical mechanics and general relativity. We assume that the "dark" component of the radial acceleration is originated from the reaction of dark energy ... More
Search for vector-like bottom quark via $Zb$ production at the LHCApr 17 2019Vector-like quarks (VLQs) are predicted in many new physics scenarios beyond the standard model (SM). We consider a search strategy for vector-like bottom quark (VLQ-$B$) at the LHC in a model independent fashion. Our analysis is based on single production ... More
On the modular operator of mutli-component regions in chiral CFTApr 17 2019We introduce an approach to find the Tomita-Takesaki modular flow for multi-component regions in chiral conformal field theory. Our method is based only locality (or braid-relations) of primary fields and the so-called Kubo-Martin-Schwinger (KMS) condition. ... More
Spin-dependent dynamically assisted Schwinger mechanismApr 17 2019We study electron and positron pair production from the vacuum by a strong slow electric field superimposed by a weak fast electric field as a perturbation (the dynamically assisted Schwinger mechanism). We argue that the Schwinger mechanism becomes spin-dependent ... More
Realtime dynamics of axion particle production due to spontaneous decay of coherent axion fieldApr 17 2019We show that the coherent axion field spontaneously decays by emitting axion particles via quantum tunneling if axion potential has more than one minimum. By employing the $\hbar$-expansion and mean field approximation, we develop a formalism to trace ... More
Spectral functions of confined particlesApr 17 2019We determine the gluon and ghost spectral functions along with the analytic structure of the associated propagators from numerical data describing Landau gauge correlators at space-like momenta obtained by either solving the Dyson-Schwinger equations ... More
Quasi-normal modes in a symmetric triangular barrierApr 17 2019Quasi-normal modes (QNMs) of the massless scalar wave in $1+1$ dimensions are obtained for a symmetric, finite, triangular barrier potential. This problem is exactly solvable, with Airy functions involved in the solutions. Before we obtain the QNMs, we ... More
Updated limits on the CP violating $ηππ$ and $η'ππ$ couplings derived from the neutron EDMApr 17 2019We complete our derivation of upper limits on the CP violating $\eta\pi\pi$ and $\eta'\pi\pi$ couplings from an analysis of their two-loop contributions to the neutron electric dipole moment (nEDM). We use a phenomenological Lagrangian approach which ... More
Kaluza-Klein Reduction of the 6 Dimensional \\ Dirac Equation on $\mathbb{S}^3 \cong SU(2)$ and \\ Non-abelian Topological InsulatorsApr 17 2019In this work, the Kaluza-Klein reduction of the Dirac equation on a 6 dimensional spacetime $\mathbb{M}^{1+5} := \mathbb{M}^{1+2} \times \mathbb{S}^3$ is studied. Because of the group structure on $\mathbb{S}^3$, $\mathbb{M}^{1+5}$ can be seen as a principal ... More
Electro-weak production of pseudovector C-even heavy quarkonia in electron-positron collisions on Belle II and BES IIIApr 17 2019It is shown that the molecular model for the X{3872) state contradicts the new experimental data as well as the old ones. It is suggested to study the \chi_{c1} and \chi_{b1} states in the e+e-\to\chi_{c1}/\chi_{b1} reactions.
A new kind of cyclic universeApr 16 2019Combining intervals of ekpyrotic (ultra-slow) contraction with a (non-singular) classical bounce naturally leads to a novel cyclic theory of the universe in which the Hubble parameter, energy density and temperature oscillate periodically, but the scale ... More
Nucleon resonance contributions to unpolarised inclusive electron scatteringApr 16 2019The first CLAS12 experiments will provide high-precision data on inclusive electron scattering observables at a photon virtuality $Q^2$ ranging from 0.05 GeV$^2$ to 12 GeV$^2$ and center-of-mass energies $W$ up to 4 GeV. In view of this endeavour, we ... More
TASI lectures on dark matter models and direct detectionApr 16 2019These lectures provide an introduction to models and direct detection of dark matter. We summarize the general features and motivations for candidates in the full dark matter mass range, and then restrict to the keV-TeV mass window. Candidates in this ... More
Consistency of local and astrophysical tests of the stability of fundamental constantsApr 16 2019Tests of the stability of nature's fundamental constants are one of the cornerstones of the ongoing search for the new physics which is required to explain the recent acceleration of the universe. The two main settings for these tests are high-resolution ... More
Observational prospects for gravitational waves from hidden or dark chiral phase transitionsApr 16 2019We study the gravitational wave (GW) signature of first-order chiral phase transitions ($\chi$PT) in strongly interacting hidden or dark sectors. We do so using several effective models in order to reliably capture the relevant non-perturbative dynamics. ... More
Revisiting the $t\bar{t}hh$ channel at the FCC-hhApr 16 2019The exploration of the scalar sector of the Standard Model is at the core of current and future science programs at collider experiments, with increasing focus on the self-interaction of the Higgs boson. This important parameter of the Higgs sector can ... More
Type I + II Seesaw in a Two Higgs Doublet ModelApr 16 2019Two Higgs Doublet Models (2HDM) are popular extensions of the Standard Model for several reasons, but do not explain neutrino masses. In this work, we investigate how one can incorporate neutrino masses within the framework of the 2HDM-U(1), where U(1) ... More
Studies of a thermally averaged p-wave Sommerfeld factorApr 16 2019Thermal pair annihilation of heavy particles, such as dark matter or its co-annihilation partners, can be strongly influenced by attractive interactions. We investigate the case that pair annihilation proceeds through a velocity-suppressed $p$-wave operator, ... More
Cosmological constant: relaxation vs multiverseApr 16 2019We consider a scalar field with a bottom-less potential, such as $g^3 \phi$, finding that cosmologies unavoidably end up with a crunch, late enough to be compatible with observations if $g \lesssim 1.2 H_0^{2/3} M_{\rm Pl}^{1/3}$. If rebounces avoid singularities, ... More
Nonlinear Dynamics of the Cold Atom Analog False VacuumApr 16 2019We investigate the nonlinear dynamics of cold atom systems that can in principle serve as quantum simulators of false vacuum decay. The analog false vacuum manifests as a metastable vacuum state for the relative phase in a two-species Bose-Einstein condensate ... More
Probing Boson Stars with Extreme Mass Ratio InspiralsApr 16 2019We propose to use gravitational waves from extreme mass ratio inspirals (EMRI), composed of a boson star and a supermassive black hole in the center of galaxies, as a new method to search for boson stars. Gravitational waves from EMRI have the advantage ... More
Imprint of a scalar era on the primordial spectrum of gravitational wavesApr 16 2019Upcoming searches for the stochastic background of inflationary gravitational waves (GWs) offer the exciting possibility to probe the evolution of our Universe prior to Big Bang nucleosynthesis. In this spirit, we explore the sensitivity of future GW ... More
Self-Interacting Dark Matter Subhalos in the Milky Way's TidesApr 16 2019We study evolution of self-interacting dark matter (SIDM) subhalos in the Milky Way (MW) tidal field. The interaction between the subhalos and the MW's tides lead to more diverse dark matter distributions in the inner region, compared to their cold dark ... More
Covariant BSSN formulation in bimetric relativityApr 16 2019Numerical integration of the field equations in bimetric relativity is necessary to obtain solutions describing realistic systems. Thus, it is crucial to recast the equations into a well-posed form. In general relativity, under certain assumptions, the ... More
Geometry of Flat Directions in Scale-Invariant PotentialsApr 16 2019We observe that biquadratic potentials admit non-trivial flat directions when the determinant of the quartic coupling matrix of the scalar fields vanishes. This consideration suggests a new approach to the problem of finding flat directions in scale invariant ... More
A Standard Ruler at Cosmic DawnApr 16 2019The matter in our Universe comes in two flavors: dark and baryonic. Of these, only the latter couples to photons, giving rise to the well-known baryon acoustic oscillations (BAOs) and, in the process, generating supersonic relative velocities between ... More
Future CMB constraints on cosmic birefringence and implications for fundamental physicsApr 16 2019The primary scientific target of the CMB polarization experiments that are currently being built and proposed is the detection of primordial tensor perturbations. As a byproduct, these instruments will significantly improve constraints on cosmic birefringence, ... More
Perturbing neutrino oscillations around the solar resonanceApr 16 2019Atmospheric neutrinos at low energies, $E \lsim 500$ MeV, is known to be a rich source of information of lepton mixing parameters. We formulate a simple perturbative framework to elucidate the characteristic features of neutrino oscillation at around ... More
Master formula for one-loop renormalization of bosonic SMEFT operatorsApr 16 2019Using background-field method and super-heat-kernel expansion, we derive a master formula for the one-loop UV divergences of the bosonic dimension-6 operators in Standard Model Effective Field Theory (SMEFT). This approach reduces the calculation of all ... More
Cosmological constraints on neutrino self-interactions with a light mediatorApr 16 2019If active neutrinos undergo non-standard (`secret') interactions (NS$\nu$I) the cosmological evolution of the neutrino fluid might be altered, leaving an imprint in cosmological observables. We use the latest publicly available CMB data from Planck to ... More
Radiative corrections to the Big-Bang Nucleosynthesis nuclear reaction ratesApr 16 2019We compute radiative corrections to nuclear reaction rates that determine the outcome of the Big-Bang Nucleosynthesis (BBN). Any nuclear reaction producing a photon with an energy above $2m_e$ must be supplemented by the corresponding reaction where the ... More
New Realization of the Conversion Calculation for Reactor Antineutrino FluxesApr 16 2019Validation of the effective conversion method in the reactor antineutrino flux calculation is examined using the ab initio calculation of the electron and antineutrino spectra from the state-of-the-art nuclear database. It turns out that neglecting the ... More
The Origin of Mass in QCD and its RenormalizationApr 16 2019We present in the most general way how the mass scale parameter appears in the QCD ground state. The transversity of the full gluon self-energy has been investigated in detail. We have derived the Schwinger-Dyson equation of motion for the full gluon ... More
Radiation beaming in the quantum regimeApr 16 2019Classical theories of radiation reaction predict that the electron motion is confined to the plane defined by the electron's instantaneous momentum and the force exerted by the external electromagnetic field. However, in the quantum radiation reaction ... More
Exclusive semileptonic decays of $D$ and $D_s$ mesons in the covariant confining quark modelApr 16 2019Recently, the BESIII collaboration has reported numerous measurements of various $D_{(s)}$ meson semileptonic decays with significantly improved precision. Together with similar studies carried out at BABAR, Belle, and CLEO, new windows to a better understanding ... More
Quasi-Exactly Solvable Scattering Problems, Exactness of the Born Approximation, and Broadband Unidirectional Invisibility in Two DimensionsApr 16 2019Achieving exact unidirectional invisibility in a finite frequency band has been an outstanding problem for many years. We offer a simple solution to this problem in two dimensions that is based on our solution to another more basic open problem of scattering ... More
On solving the Thomas Bargman-Michel-Telegdi equation using the Bogoliubov Krylov method of averages and the calculation of the Berry phasesApr 16 2019Several proposals aimed at measuring the Electric Dipole Moment (EDM) for charged particles require very precise simulations and understanding of the systematic errors that can contribute to a spin buildup mimicking the EDM signal to be detected. In what ... More
Quark mass function from a OGE-type interaction in Minkowski spaceApr 16 2019We present results for the quark mass function in Minkowski space calculated from an interaction kernel that consists of an effective one-gluon-exchange and a constant interaction. We analyze the gauge dependence of our results and compare them in the ... More