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Published: 2018-04-24T05:03:14+00:00
2018-04-23T10:00:00+00:00
Author(s): Samuel D. McDermott, Hiren H. Patel, and Harikrishnan RamaniWe calculate the exact width for a dark photon decaying to three photons at one-loop order for dark photon masses ${m}^{′}$ below the ${e}^{+}{e}^{−}$ production threshold of $2{m}_{e}$. We find substantial deviations from previous results derived from the lowest order Euler-Heisenberg effective Lag...
2018-04-23T10:00:00+00:00
Author(s): Fabrizio Caola, Gionata Luisoni, Kirill Melnikov, and Raoul RöntschWe present a computation of the next-to-next-to-leading-order (NNLO) QCD corrections to the production of a Higgs boson in association with a $W$ boson at the LHC and the subsequent decay of the Higgs boson into a $b\overline{b}$ pair, treating the $b$ quarks as massless. We consider various kinemat...
2018-04-23T10:00:00+00:00
Author(s): P. Kroll and K. Passek-KumeričkiWe investigate wide-angle ${π}^{0}$ photoproduction within the handbag approach to twist-3 accuracy. In contrast to earlier work both the 2-particle as well as the 3-particle twist-3 contributions are taken into account. It is shown that both are needed for consistent results that respect gauge inva...
2018-04-23T10:00:00+00:00
Author(s): V. P. Gonçalves, M. M. Jaime, D. E. Martins, and M. S. RangelIn this paper, we estimate the production of dimuons (${μ}^{+}{μ}^{−}$) in exclusive photon-photon ($γγ$) and diffractive Pomeron-Pomeron ($I\phantom{\rule[-0.0ex]{-0.3em}{0.0ex}}PI\phantom{\rule[-0.0ex]{-0.3em}{0.0ex}}P$), Pomeron-Reggeon ($I\phantom{\rule[-0.0ex]{-0.3em}{0.0ex}}PI\phantom{\rule[-0...
2018-04-23T10:00:00+00:00
Author(s): Hai Tao Li, Chong Sheng Li, and Jian WangWe present a fully differential next-to-next-to-leading order QCD calculation of the Higgs pair production in association with a $Z$ boson at hadron colliders, which is important for probing the trilinear Higgs self-coupling. The next-to-next-to-leading-order corrections enhance the next-to-leading ...
2018-04-23T10:00:00+00:00
Author(s): Tommi Alanne, Nicolas Bizot, Giacomo Cacciapaglia, and Francesco SanninoWe provide a general classification of template operators, up to next-to-leading order, that appear in chiral perturbation theories based on the two flavor patterns of spontaneous symmetry breaking $\mathrm{SU}({N}_{\mathrm{F}})/\mathrm{Sp}({N}_{\mathrm{F}})$ and $\mathrm{SU}({N}_{\mathrm{F}})/\math...
2018-04-23T10:00:00+00:00
Author(s): Lindsay Forestell, David E. Morrissey, and Kris SigurdsonNon-Abelian dark gauge forces that do not couple directly to ordinary matter may be realized in nature. The minimal form of such a dark force is a pure Yang-Mills theory. If the dark sector is reheated in the early Universe, it will be realized as a set of dark gluons at high temperatures and as a c...
2018-04-23T10:00:00+00:00
Author(s): Jeffrey M. Berryman, André de Gouvêa, Kevin J. Kelly, and Yue ZhangExperimentally, baryon number minus lepton number, $B−L$, appears to be a good global symmetry of nature. We explore the consequences of the existence of gauge-singlet scalar fields charged under $B−L$–dubbed lepton-number-charged scalars (LeNCSs)—and postulate that these couple to the standard mode...
2018-04-23T10:00:00+00:00
Author(s): Ying-nan MaoWe propose spontaneous $CP$ violation in the simplest little Higgs model. In this model, the pseudoscalar field can acquire a nonzero vacuum expectation value. This leads to a mixing between the two scalars with different $CP$ charge, which means that spontaneous $CP$ violation occurs. It is also a ...
2018-04-23T10:00:00+00:00
Author(s): Kaustubh Agashe, Peizhi Du, and Sungwoo HongRecently, it was shown in K. Agashe et al. [Phys. Rev. D 94, 013001 (2016)] that a straightforward implementation of the type I seesaw mechanism in a warped extra dimensional framework is in reality a natural realization of “inverse” seesaw; i.e., the Standard Model (SM) neutrino mass is dominantly...
2018-04-23T10:00:00+00:00
Author(s): Kaustubh Agashe, Peizhi Du, and Sungwoo HongA natural seesaw mechanism for obtaining the observed size of SM neutrino masses can arise in a warped extra-dimensional/composite Higgs framework. In a previous paper, we initiated the study of signals at the LHC for the associated $∼\mathrm{TeV}$ mass SM singlet neutrinos, within a canonical model...
2018-04-23T10:00:00+00:00
Author(s): Jens Braun, Marc Leonhardt, and Martin PospiechNambu-Jona-Lasinio-type models are often employed as low-energy models for the theory of the strong interaction to analyze its phase structure at finite temperature and quark chemical potential. In particular, at low temperature and large chemical potential, where the application of fully first-prin...
2018-04-23T10:00:00+00:00
Author(s): P. B. Covas et al. (LSC Instrument Authors)Searches are under way in Advanced LIGO and Virgo data for persistent gravitational waves from continuous sources, e.g. rapidly rotating galactic neutron stars, and stochastic sources, e.g. relic gravitational waves from the Big Bang or superposition of distant astrophysical events such as mergers o...
2018-04-23T10:00:00+00:00
Author(s): B. M. Roberts, G. Blewitt, C. Dailey, and A. DereviankoWe analyze the prospects of employing a distributed global network of precision measurement devices as a dark matter and exotic physics observatory. In particular, we consider the atomic clocks of the global positioning system (GPS), consisting of a constellation of 32 medium-Earth orbit satellites ...
2018-04-23T10:00:00+00:00
Author(s): B. Theodore Zhang, Kohta Murase, Shigeo S. Kimura, Shunsaku Horiuchi, and Peter MészárosRecent results from the Pierre Auger Collaboration have shown that the composition of ultrahigh-energy cosmic rays (UHECRs) becomes gradually heavier with increasing energy. Although gamma-ray bursts (GRBs) have been promising sources of UHECRs, it is still unclear whether they can account for the A...
2018-04-23T10:00:00+00:00
Author(s): Fuminori Hasegawa and Jeong-Pyong HongCosmological $α$-attractors are observationally favored due to the asymptotic flatness of the potential. Since its flatness induces the negative pressure, the coherent oscillation of the inflaton field could fragment into quasistable localized objects called I-balls (or “oscillons”). We investigated...
2018-04-23T10:00:00+00:00
Author(s): Krzysztof BolejkoThe gravitational entropy and no-hair conjectures seem to predict contradictory future states of our Universe. The growth of the gravitational entropy is associated with the growth of inhomogeneity, while the no-hair conjecture argues that a universe dominated by dark energy should asymptotically ap...
2018-04-23T10:00:00+00:00
Author(s): Hermano Velten, Syrios Gomes, and Vinicius C. BustiWe revisit a model-independent estimator for cosmic acceleration based on type Ia supernovae distance measurements. This approach does not rely on any specific theory for gravity, energy content, nor parametrization for the scale factor or deceleration parameter and is based on falsifying the null h...
2018-04-23T10:00:00+00:00
Author(s): Maximilian Düll, Frederic P. Schuller, Nadine Stritzelberger, and Florian WolzThe requirement that both the matter and the geometry of a spacetime canonically evolve together, starting and ending on shared Cauchy surfaces and independently of the intermediate foliation, leaves one with little choice for diffeomorphism-invariant gravitational dynamics that can equip the coeffi...
2018-04-23T10:00:00+00:00
Author(s): G. Antoniou, A. Bakopoulos, and P. KantiIn the context of the Einstein-scalar-Gauss-Bonnet theory, with a general coupling function between the scalar field and the quadratic Gauss-Bonnet term, we investigate the existence of regular black-hole solutions with scalar hair. Based on a previous theoretical analysis, which studied the evasion...
2018-04-23T10:00:00+00:00
Author(s): Vasileios Paschalidis, Kent Yagi, David Alvarez-Castillo, David B. Blaschke, and Armen SedrakianGravitational wave observations of GW170817 placed bounds on the tidal deformabilities of compact stars, allowing one to probe equations of state for matter at supranuclear densities. Here we design new parametrizations for hybrid hadron-quark equations of state, which give rise to low-mass twin sta...
2018-04-23T10:00:00+00:00
Author(s): S. H. Hendi, Z. S. Taghadomi, and C. CordaThe motion of a point charged particle moving in the background of the critical power Maxwell charged AdS black holes in a probe approximation is studied. The extended phase space, where the cosmological constant appears as a pressure, is regarded and the effective potential is investigated. At last...
2018-04-23T10:00:00+00:00
Author(s): Yungui Gong (龚云贵), Shaoqi Hou (侯绍齐), Dicong Liang (梁迪聪), and Eleftherios PapantonopoulosIn this work we discuss the polarization contents of Einstein-æther theory and the generalized tensor-vector-scalar (TeVeS) theory, as both theories have a normalized timelike vector field. We derive the linearized equations of motion around the flat spacetime background using the gauge-invariant va...
2018-04-23T10:00:00+00:00
Author(s): Ivica SmolićStealth field configurations by definition have a vanishing energy-momentum tensor, and thus do not contribute to the gravitational field equations. While only trivial fields can be stealth in Maxwell’s electrodynamics, nontrivial stealth fields appear in some nonlinear models of electromagnetism. W...
2018-04-23T10:00:00+00:00
Author(s): Norman Gürlebeck and Martin ScholtzIn our previous work [N. Gürlebeck and M. Scholtz, Phys. Rev. D 95, 064010 (2017)], we have shown that electric and magnetic fields are expelled from the horizons of extremal, stationary and axially symmetric uncharged black holes; this is called the Meissner effect for black holes. Here, we general...
2018-04-23T10:00:00+00:00
Author(s): Oliver SchnetzWe review recent results in the theory of numbers and single-valued functions on the complex plane which arise in quantum field theory. These results are the basis for a new approach to high-loop-order calculations. As concrete examples, we provide scheme-independent counterterms of primitive log-di...
2018-04-20T10:00:00+00:00
Author(s): E. G. de Oliveira, A. D. Martin, and M. G. RyskinWe compare the rapidity, $y$, and the beam energy, $\sqrt{s}$, behaviors of the cross section of the data for $D$ meson production in the forward direction that were measured by the LHCb Collaboration. We describe the observed cross sections using NLO perturbative QCD, and choose the optimal factori...
2018-04-20T10:00:00+00:00
Author(s): Mattia Bruno, Christoph Lehner, and Amarjit Soni (RBC and UKQCD Collaborations)We propose a method to compute the Wilson coefficients of the weak effective Hamiltonian to all orders in the strong coupling constant using Lattice QCD simulations. We perform our calculations adopting an unphysically light weak boson mass of around 2 GeV. We demonstrate that systematic errors for ...
2018-04-20T10:00:00+00:00
Author(s): Georg Bergner and Stefano PiemonteNon-Abelian 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 $\mathcal{N}=1$ supersymmetric Yang-Mills (SYM) theory and minima...
2018-04-20T10:00:00+00:00
Author(s): Gil Paz and Joydeep RoyMany extensions of the standard model contain an extra $U(1{)}^{′}$ gauge group with a heavy ${Z}^{′}$ gauge boson. Perhaps the most clear signal for such a ${Z}^{′}$ would be a resonance in the invariant mass spectrum of the lepton pairs to which it decays. In the absence of such a signal, experime...
2018-04-20T10:00:00+00:00
Author(s): Renato M. Fonseca, Martin Hirsch, and Rahul SrivastavaWe discuss lepton number violation in three units. From an effective field theory point of view, $\mathrm{Δ}L=3$ processes can only arise from dimension 9 or higher operators. These operators also violate baryon number, hence many of them will induce proton decay. Given the high dimensionality of th...
2018-04-20T10:00:00+00:00
Author(s): Kingman Cheung and Hiroshi OkadaWe propose a radiative neutrino-mass model by introducing 3 generations of fermion pairs ${E}^{−(N+1)/2}{E}^{+(N+1)/2}$ and a couple of multicharged bosonic doublet fields ${\mathrm{Φ}}_{N/2},{\mathrm{Φ}}_{N/2+1}$, where $N=1$, 3, 5, 7, 9. We show that the models can satisfy the neutrino masses and ...
2018-04-20T10:00:00+00:00
Author(s): J. A. Gracey and R. M. SimmsWe introduce a more general set of kinematic renormalization schemes than the original momentum subtraction schemes of Celmaster and Gonsalves. These new schemes will depend on a parameter $ω$, which tags the external momentum of one of the legs of the three-point vertex functions in QCD. In each of...
2018-04-20T10:00:00+00:00
Author(s): Avirup Ghosh and Rohit MishraThe change in holographic entanglement entropy (HEE) for small fluctuations about pure anti-de Sitter (AdS) is obtained by a perturbative expansion of the area functional in terms of the change in the bulk metric and the embedded extremal surface. However it is known that change in the embedding app...
2018-04-19T10:00:00+00:00
Author(s): Manfred Lindner, Werner Rodejohann, and Xun-Jie XuWe revisit correlations of neutrino oscillation parameters in reactor and long-baseline neutrino oscillation experiments. A framework based on an effective value of ${θ}_{13}$ is presented, which can be used to analytically study the correlations and explain some questions including why and when ${δ...
2018-04-19T10:00:00+00:00
Author(s): Aleksander V. Sidorov, Vasil I. Lashkevich, and Olga P. SolovtsovaA new approximation is proposed for the contour of the stationary phase of the Mellin-Barnes integrals in the case of its finite asymptotic behavior as $\mathrm{Re}z→−∞$. The efficiency of application of the proposed contour and the quadratic approximation to the contour of the stationary phase is c...
2018-04-19T10:00:00+00:00
Author(s): Steven B. Giddings and Dimitrios PsaltisThe need for a consistent quantum evolution for black holes has led to proposals that their semiclassical description is modified not just near the singularity, but at horizon or larger scales. If such modifications extend beyond the horizon, they influence regions accessible to distant observation....
2018-04-19T10:00:00+00:00
Author(s): Benjamin Bahr and Vadim BelovWe propose a quantum version of the quadratic volume simplicity constraint for the Engle-Livine-Pereira-Rovelli spin foam model. It relies on a formula for the volume of 4-dimensional polyhedra, depending on its bivectors and the knotting class of its boundary graph. While this leads to no further c...
2018-04-19T10:00:00+00:00
Author(s): Benjamin Bahr and Giovanni RabuffoIn this article, we consider an ad hoc deformation of the Engle-Livine-Pereira-Rovelli model for quantum gravity by a cosmological constant term. This sort of deformation was first introduced by Han for the case of the 4-simplex. In this article, we generalize the deformation to the case of arbitrar...
2018-04-19T10:00:00+00:00
Author(s): Subeom Kang and Dong-han YeomWe investigate a tunneling and emission process of a thin-shell from a Schwarzschild black hole, where the shell was initially located beyond the Einstein-Rosen bridge and finally appears at the right side of the Penrose diagram. In order to obtain such a solution, we should assume that the areal ra...
2018-04-18T10:00:00+00:00
Author(s): A. A. Osipov and M. K. VolkovUsing the Nambu–Jona-Lasinio model with the $U(2)×U(2)$ chiral symmetric effective four-quark interactions, we derive the amplitude of the radiative decay ${f}_{1}(1285)→{π}^{+}{π}^{−}γ$, find the decay width $\mathrm{Γ}({f}_{1}→{π}^{+}{π}^{−}γ)=346\text{ }\text{ }\mathrm{keV}$ and obtain the spectr...
2018-04-18T10:00:00+00:00
Author(s): Jian-Hui Zhang, Jiunn-Wei Chen, and Christopher MonahanWe show that the correct way to extract parton distribution functions from the reduced Ioffe-time distribution, a ratio of the Ioffe-time distribution for a moving hadron and a hadron at rest, is through a factorization formula. This factorization exists because, at small distances, forming the rati...
2018-04-18T10:00:00+00:00
Author(s): Luca Amendola, Javier Rubio, and Christof WetterichPrimordial black holes can be produced by a long-range attractive fifth force stronger than gravity, mediated by a light scalar field interacting with nonrelativistic “heavy” particles. As soon as the energy fraction of heavy particles reaches a threshold, the fluctuations rapidly become nonlinear. ...
2018-04-18T10:00:00+00:00
Author(s): Chengjie Fu, Puxun Wu, and Hongwei YuWe study the preheating and the in-process production of gravitational waves (GWs) after inflation in which the inflaton is nonminimally coupled to the curvature in a self-interacting quartic potential with the method of lattice simulation. We find that the nonminimal coupling enhances the amplitude...
2018-04-18T10:00:00+00:00
Author(s): Laur Järv, Antonio Racioppi, and Tommi TenkanenWe perform an analysis of models of chaotic inflation where the inflaton field $ϕ$ is coupled nonminimally to gravity via $ξ{ϕ}^{n}{g}^{μν}{R}_{μν}(\mathrm{Γ}),n>0$. We focus on the Palatini theory of gravity, i.e., the case where the assumptions of general relativity are relaxed (that of the con...
2018-04-18T10:00:00+00:00
Author(s): A. V. BelitskyTwist fields were introduced a few decades ago as a quantum counterpart to classical kink configurations and disorder variables in low dimensional field theories. In recent years they received a new incarnation within the framework of geometric entropy and strong coupling limit of four-dimensional s...
2018-04-17T10:00:00+00:00
Author(s): A. M. Sirunyan et al. (CMS Collaboration)An analysis of the bottom baryon decay ${\mathrm{Λ}}_{b}→J/ψ(→{μ}^{+}{μ}^{−})\mathrm{Λ}(→p{π}^{−})$ is performed to measure the ${\mathrm{Λ}}_{b}$ polarization and three angular parameters in data from $pp$ collisions at $\sqrt{s}=7$ and 8 TeV, collected by the CMS experiment at the Large Hadron Col...
2018-04-17T10:00:00+00:00
Author(s): P.-H. Chu, L. D. Duffy, Y. J. Kim, and I. M. SavukovWe investigate the sensitivity of a search for the oscillating current induced by axion dark matter in an external magnetic field using optically pumped magnetometers. This experiment is based upon the LC circuit (circuit with inductor and capacitor) axion detection concept of Sikivie et al. [Phys. ...
2018-04-17T10:00:00+00:00
Author(s): A. Aguilar-Arevalo, M. Aoki, M. Blecher, D. I. Britton, D. vom Bruch, D. A. Bryman, S. Chen, J. Comfort, S. Cuen-Rochin, L. Doria, P. Gumplinger, A. Hussein, Y. Igarashi, S. Ito, S. Kettell, L. Kurchaninov, L. S. Littenberg, C. Malbrunot, R. E. Mischke, T. Numao, D. Protopopescu, A. Sher, T. Sullivan, and D. Vavilov (PIENU Collaboration)As established conclusively in recent years, standard model neutrinos have mass. Additional heavy neutrino states, such as sterile neutrinos, are required in many models of neutrino masses. PIENU, via a novel use of the positron decay mode of the pion, has set new limits on these massive states.
(image)2018-04-17T10:00:00+00:00
Author(s): Tianbo Liu, Zhiwen Zhao, and Haiyan GaoThe electric dipole moments (EDMs) of nucleons are sensitive probes of additional $CP$ violation sources beyond the standard model to account for the baryon number asymmetry of the universe. As a fundamental quantity of the nucleon structure, tensor charge is also a bridge that relates nucleon EDMs ...
2018-04-17T10:00:00+00:00
Author(s): Hrayr H. Matevosyan, Alessandro Bacchetta, Daniël Boer, Aurore Courtoy, Aram Kotzinian, Marco Radici, and Anthony W. ThomasThe cross section for back-to-back hadron pair production in ${e}^{+}{e}^{−}$ annihilation provides access to the dihadron fragmentation functions (DiFF) needed to extract nucleon parton distribution functions from the semi-inclusive deep inelastic scattering (SIDIS) experiments with two detected fi...
2018-04-17T10:00:00+00:00
Author(s): W. Detmold and M. G. EndresWe investigate the lattice spacing dependence of the equilibration time for a recently proposed multiscale thermalization algorithm for Markov chain Monte Carlo simulations. The algorithm uses a renormalization-group matched coarse lattice action and prolongation operation to rapidly thermalize deco...
2018-04-17T10:00:00+00:00
Author(s): Giorgio Arcadi, C. P. Ferreira, Florian Goertz, M. M. Guzzo, Farinaldo S. Queiroz, and A. C. O. SantosGuided by gauge principles we discuss a predictive and falsifiable UV complete model where the Dirac fermion that accounts for the cold dark matter abundance in our Universe induces the lepton flavor violation (LFV) decays $μ→eγ$ and $μ→eee$ as well as $μ−e$ conversion. We explore the interplay betw...
2018-04-17T10:00:00+00:00
Author(s): Seyed Mohsen Etesami, Sara Khatibi, and Mojtaba Mohammadi NajafabadiIn this paper, we investigate the prospects of measuring the strong and weak dipole moments of the top quark at the Large Hadron Collider (LHC). Measurements of these couplings provide an excellent opportunity to probe new physics interactions as they have quite small magnitudes in the standard mode...
2018-04-17T10:00:00+00:00
Author(s): Hao Liu, Xinyang Wang, Lang Yu, and Mei HuangWe investigate both (pseudo)scalar mesons and diquarks in the presence of external magnetic field in the framework of the two-flavored Nambu–Jona-Lasinio (NJL) model, where mesons and diquarks are constructed by infinite sum of quark-loop chains by using random phase approximation. The polarization ...
2018-04-17T10:00:00+00:00
Author(s): Panagiotis Betzios, Umut Gürsoy, Matti Järvinen, and Giuseppe PolicastroWe study fluctuations around equilibrium in a class of strongly interacting nonconformal plasmas using holographic techniques. In particular, we calculate the quasinormal mode spectrum of black hole backgrounds that approach Chamblin-Reall plasmas in the IR. In a specific limit, related to the exact...
2018-04-17T10:00:00+00:00
Author(s): P. K. Mohanty, K. P. Arunbabu, T. Aziz, S. R. Dugad, S. K. Gupta, B. Hariharan, P. Jagadeesan, A. Jain, S. D. Morris, P. K. Nayak, P. S. Rakshe, K. Ramesh, B. S. Rao, M. Zuberi, Y. Hayashi, S. Kawakami, P. Subramanian, S. Raha, S. Ahmad, A. Oshima, S. Shibata, and H. KojimaThe GRAPES-3 muon telescope in Ooty, India had claimed detection of a 2 hour (h) high-energy ($∼20\text{ }\text{ }\mathrm{GeV}$) burst of galactic cosmic-rays (GCRs) through a $>50σ$ surge in GeV muons, was caused by reconnection of the interplanetary magnetic field (IMF) in the magnetosphere tha...
2018-04-17T10:00:00+00:00
Author(s): A. Mohammadi, Kh. Saaidi, and T. GolanbariThe constant-roll inflation is studied where the inflaton is taken as a tachyon field. Based on this approach, the second slow-roll parameter is taken as a constant which leads to a differential equation for the Hubble parameter. Finding an exact solution for the Hubble parameter is difficult and le...
2018-04-17T10:00:00+00:00
Author(s): Daniel J. D’Orazio and Abraham LoebThe merger of stellar-mass black holes (BHs) is not expected to generate detectable electromagnetic (EM) emission. However, the gravitational wave (GW) events GW150914 and GW170104, detected by the Laser Interferometer Gravitational Wave Observatory to be the result of merging, $∼60{M}_{⊙}$ binary b...
2018-04-17T10:00:00+00:00
Author(s): Seiga Sato and Kei-ichi MaedaWe propose a hybrid type of the conventional Higgs inflation and new Higgs inflation models. We perform a disformal transformation into the Einstein frame and analyze the background dynamics and the cosmological perturbations in the truncated model, in which we ignore the higher-derivative terms of ...
2018-04-17T10:00:00+00:00
Author(s): David ChesterRecently, a double-copy formalism was used to calculate gravitational radiation from classical Yang-Mills radiation solutions. This work shows that the Yang-Mills theory coupled to a biadjoint scalar field admits a radiative double copy that agrees with solutions in the Einstein-Yang-Mills theory at...
2018-04-17T10:00:00+00:00
Author(s): Bofeng Wu and Chao-Guang HuangThe $1/r$ expansion in the distance to the source is applied to the linearized $f(R)$ gravity, and its multipole expansion in the radiation field with irreducible Cartesian tensors is presented. Then, the energy, momentum, and angular momentum in the gravitational waves are provided for linearized $...
2018-04-17T10:00:00+00:00
Author(s): Anshu Gupta, Badri Krishnan, Alex B. Nielsen, and Erik SchnetterWhen binary black holes merge, they settle asymptotically to new Kerr black holes. What happens to the black hole horizon during this dynamical process? This paper studies the emergence and evolution of a common horizon during the merger.
(image)2018-04-17T10:00:00+00:00
Author(s): Bao-Fei Li, Parampreet Singh, and Anzhong WangWe present a systematic study of the cosmological dynamics resulting from an effective Hamiltonian, recently derived in loop quantum gravity using Thiemann’s regularization and earlier obtained in loop quantum cosmology (LQC) by keeping the Lorentzian term explicit in the Hamiltonian constraint. We ...
2018-04-17T10:00:00+00:00
Author(s): Miguel R. Correia and Vitor CardosoThe ability to detect and scrutinize gravitational waves from the merger and coalescence of compact binaries opens up the possibility to perform tests of fundamental physics. One such test concerns the dark nature of compact objects: are they really black holes? It was recently pointed out that the ...
2018-04-17T10:00:00+00:00
Author(s): N. FarhangkhahWe present the black hole solutions possessing horizon with nonconstant-curvature and additional scalar restrictions on the base manifold in Lovelock gravity coupled to Born-Infeld (BI) nonlinear electrodynamics. The asymptotic and near origin behavior of the metric is presented and we analyze diffe...
2018-04-17T10:00:00+00:00
Author(s): Valerio Faraoni, Fayçal Hammad, Adriana M. Cardini, and Thomas GobeilWe report the explicit form of the general static, spherically symmetric, and asymptotically flat solution of vacuum Brans-Dicke gravity in the Jordan frame, assuming that the Brans-Dicke scalar field has no singularities or zeros (except possibly for a central singularity). This general solution is...
2018-04-17T10:00:00+00:00
Author(s): Roman A. Konoplya and Alexander ZhidenkoQuasinormal modes of a massive Dirac field were calculated for various static black hole backgrounds with the help of the WKB formula. These estimations, however, are rough and valid only for very small values of $μM$, where $M$ and $μ$ are mass of the black hole and field respectively. Thus, no acc...
2018-04-17T10:00:00+00:00
Author(s): Xian-Hui Ge, Yu Tian, Shang-Yu Wu, and Shao-Feng Wu2018-04-16T10:00:00+00:00
Author(s): T. Phong Nguyen, T. Thuy Le, T. T. Hong, and L. T. HueBy adding new gauge singlets of neutral leptons, the improved versions of the 3-3-1 models with right-handed neutrinos have been recently introduced in order to explain recent experimental neutrino oscillation data through the inverse seesaw mechanism. We prove that these models predict promising si...
2018-04-16T10:00:00+00:00
Author(s): Samira Shoeibi, F. Taghavi-Shahri, Hamzeh Khanpour, and Kurosh JavidanIn recent years, several experiments at the ${e}^{−}p$ collider HERA have collected high precision deep-inelastic scattering (DIS) data on the spectrum of leading nucleon carrying a large fraction of the proton’s energy. In this paper, we have analyzed recent experimental data on the production of f...
2018-04-16T10:00:00+00:00
Author(s): Maryam Soleymaninia, Hamzeh Khanpour, and S. Mohammad Moosavi NejadWe present, for the first time, a set of next-to-next-to-leading order (NNLO) fragmentation functions (FFs) describing the production of charmed-meson ${D}^{*}$ from partons. Exploiting the universality and scaling violations of FFs, we extract the NLO and NNLO FFs through a global fit to all releva...
2018-04-16T10:00:00+00:00
Author(s): Akira Watanabe, Takahiro Sawada, and Chung Wen KaoWe investigate the valence $u$ and $\overline{s}$ quark distribution functions of the ${K}^{+}$ meson, ${v}^{K(u)}(x,{Q}^{2})$ and ${v}^{K(\overline{s})}(x,{Q}^{2})$, in the framework of the chiral constituent quark model. We judiciously choose the bare distributions at the initial scale to generate...
2018-04-16T10:00:00+00:00
Author(s): A. Gómez Nicola and J. Ruiz de ElviraWe present and analyze a new set of Ward Identities which shed light on the distinction between different patterns of chiral symmetry restoration in QCD, namely $O(4)$ vs $O(4)×U(1{)}_{A}$. The degeneracy of chiral partners for all scalar and pseudoscalar meson nonet members is studied through their...
2018-04-16T10:00:00+00:00
Author(s): T. De Meerleer, D. Dudal, S. P. Sorella, P. Dall’Olio, and A. BashirThe Landau-Khalatnikov-Fradkin transformations (LKFTs) allow one to interpolate $n$-point functions between different gauges. We first offer an alternative derivation of these LKFTs for the gauge and fermions field in the Abelian (QED) case when working in the class of linear covariant gauges. Our d...
2018-04-16T10:00:00+00:00
Author(s): Christof GattringerWe discuss lattice QCD with one flavor of staggered fermions and show that in the path integral the baryon contributions can be fully separated from quark and diquark contributions. The baryonic degrees of freedom (d.o.f.) are independent of the gauge field, and the corresponding free fermion action...
2018-04-16T10:00:00+00:00
Author(s): Gordan Krnjaic, Pedro A. N. Machado, and Lina NecibCold, ultralight ($≪\mathrm{eV}$) bosonic fields can induce fast temporal variation in neutrino couplings, thereby distorting neutrino oscillations. In this paper, we exploit this effect to introduce a novel probe of neutrino time variation and dark matter at long-baseline experiments. We study seve...
2018-04-16T10:00:00+00:00
Author(s): Jhovanny Mejía-Guisao, Diego Milanés, Néstor Quintero, and José D. Ruiz-ÁlvarezLepton-number violation can be induced by the exchange of an on-shell Majorana neutrino $N$ in semileptonic $|\mathrm{Δ}L|=2$ decays of the ${B}_{s}$ meson, ${B}_{s}^{0}→{P}^{−}{π}^{−}{μ}^{+}{μ}^{+}$ with $P=K,{D}_{s}$. We investigate the production of such a heavy sterile neutrino through these fou...
2018-04-16T10:00:00+00:00
Author(s): Wilfried Buchmuller and Ketan M. PatelWe quantitatively analyze a quark-lepton flavor model derived from a six-dimensional supersymmetric theory with $SO(10)×U(1)$ gauge symmetry, compactified on an orbifold with magnetic flux. Two bulk $\mathbf{16}$-plets charged under the $U(1)$ provide the three quark-lepton generations whereas two u...
2018-04-16T10:00:00+00:00
Author(s): Asimina Arvanitaki, Peter W. Graham, Jason M. Hogan, Surjeet Rajendran, and Ken Van TilburgWe show that gravitational wave detectors based on a type of atom interferometry are sensitive to ultralight scalar dark matter. Such dark matter can cause temporal oscillations in fundamental constants with a frequency set by the dark matter mass and amplitude determined by the local dark matter de...
2018-04-16T10:00:00+00:00
Author(s): J. Asaadi, E. Church, R. Guenette, B. J. P. Jones, and A. M. SzelcThe low-energy excesses observed by the MiniBooNE experiment have, to date, defied a convincing explanation under the standard model even with accommodation for nonzero neutrino mass. In this paper we explore a new oscillation mechanism to explain these anomalies, invoking a light neutrinophilic Hig...
2018-04-16T10:00:00+00:00
Author(s): Jose Luis Blázquez-Salcedo, Jutta Kunz, Francisco Navarro-Lérida, and Eugen RaduA new class of black hole solutions of the five-dimensional minimal gauged supergravity is presented. They are characterized by the mass, the electric charge, two equal magnitude angular momenta and the magnitude of the magnetic potential at infinity. These black holes possess a horizon of spherical...
2018-04-16T10:00:00+00:00
Author(s): J.-F. GlicensteinThe gravitational deflection of massless and massive particles, both with and without spin, has been extensively studied. This paper discusses the lensing of a particle which oscillates between two interaction eigenstates. The deflection angle, lens equation and time delay between images are derived...
2018-04-16T10:00:00+00:00
Author(s): Shang Li, Yun-Feng Liang, Zi-Qing Xia, Lei Zu, Kai-Kai Duan, Zhao-Qiang Shen, Lei Feng, Qiang Yuan, and Yi-Zhong FanThe observation of a special spectral feature in the gamma-ray data would be one of the best ways to identify dark matter (DM). The box-shaped gamma-ray spectra could be generated by the decay of intermediate particles produced by DM annihilation or decay. It provides another kind of signal that can...
2018-04-16T10:00:00+00:00
Author(s): Rio SaitouWe perform a model-independent analysis of kinetically driven inflation (KDI) which (partially) includes generalized G-inflation and ghost inflation. We evaluate the background evolution splitting into the inflationary attractor and the perturbation around it. We also consider the quantum fluctuatio...
2018-04-16T10:00:00+00:00
Author(s): Vee-Liem SawThe mass loss of an isolated gravitating system due to energy carried away by gravitational waves with a cosmological constant $\mathrm{Λ}∈\mathbb{R}$ was recently worked out, using the Newman-Penrose-Unti approach. In that same article, an expression for the Bondi mass of the isolated system, ${M}_...
2018-04-16T10:00:00+00:00
Author(s): Shahar HodHorizonless spacetimes describing spatially regular ultracompact objects which, like black-hole spacetimes, possess closed null circular geodesics (light rings) have recently attracted much attention from physicists and mathematicians. In the present paper we raise the following physically intriguin...
2018-04-16T10:00:00+00:00
Author(s): Ram Brustein and Yotam SherfHigher-derivative gravity theories, such as Lovelock theories, generalize Einstein’s general relativity (GR). Modifications to GR are expected when curvatures are near Planckian and appear in string theory or supergravity. But can such theories describe gravity on length scales much larger than the ...
2018-04-16T10:00:00+00:00
Author(s): Pedro V. P. Cunha, Carlos A. R. Herdeiro, and Maria J. RodriguezThere is an exciting prospect of obtaining the shadow of astrophysical black holes (BHs) in the near future with the Event Horizon Telescope. As a matter of principle, this justifies asking how much one can learn about the BH horizon itself from such a measurement. Since the shadow is determined by ...
2018-04-16T10:00:00+00:00
Author(s): Jens Boos, Valeri P. Frolov, and Andrei ZelnikovWe study the gravitational field of static $p$-branes in $D$-dimensional Minkowski space in the framework of linearized ghost-free (GF) gravity. The concrete models of GF gravity we consider are parametrized by the nonlocal form factors $\mathrm{exp}(−□/{μ}^{2})$ and $\mathrm{exp}({□}^{2}/{μ}^{4})$,...
2018-04-16T10:00:00+00:00
Author(s): Francesco Torsello, Mikica Kocic, Marcus Högås, and Edvard MörtsellWe explore spacetime symmetries and topologies of the two metric sectors in Hassan–Rosen bimetric theory. We show that, in vacuum, the two sectors can either share or have separate spacetime symmetries. If stress–energy tensors are present, a third case can arise, with different spacetime symmetries...
2018-04-16T10:00:00+00:00
Author(s): L. Filipe O. Costa, Georgios Lukes-Gerakopoulos, and Oldřich SemerákThe Mathisson-Papapetrou-Dixon (MPD) equations, providing the “pole-dipole” description of spinning test particles in general relativity, have to be supplemented by a condition specifying the worldline that will represent the history of the studied body. It has long been thought that the Mathisson-P...
2018-04-16T10:00:00+00:00
Author(s): Jai Grover, Jutta Kunz, Petya Nedkova, Alexander Wittig, and Stoytcho YazadjievWe study the local shadow of the Schwarzschild black hole with a quadrupole distortion and the influence of the external gravitational field on the photon dynamics. The external matter sources modify the light ring structure and lead to the appearance of multiple shadow images. In the case of negati...
2018-04-16T10:00:00+00:00
Author(s): Debabrata Deb, B. K. Guha, Farook Rahaman, and Saibal RayWe study strange stars in the framework of $f(R,\mathcal{T})$ theory of gravity. To provide exact solutions of the field equations it is considered that the gravitational Lagrangian can be expressed as the linear function of the Ricci scalar $R$ and the trace of the stress-energy tensor $\mathcal{T}...
2018-04-16T10:00:00+00:00
Author(s): Rodrigo Vicente, Vitor Cardoso, and Jorge C. LopesSuperradiant scattering is a radiation enhancement process that takes place in many contexts, and which has recently found exciting applications in astrophysics and particle physics. In the framework of curved spacetime physics, it has been associated with the classical Penrose process for particles...
2018-04-16T10:00:00+00:00
Author(s): Sanved Kolekar and Jorma LoukoThe Rindler horizon in Minkowski spacetime can be implanted with supertranslation hair by a matter shock wave without planar symmetry, and the hair is observable as a supertranslation memory on the Rindler family of uniformly linearly accelerated observers. We show that this classical memory is acco...
2018-04-16T10:00:00+00:00
Author(s): F. BecattiniWe address the problem of thermodynamic equilibrium with constant acceleration along the velocity field lines in a quantum relativistic statistical mechanics framework. We show that for a free scalar quantum field, after vacuum subtraction, all mean values vanish when the local temperature $T$ is as...
2018-04-16T10:00:00+00:00
Author(s): Grigoris Panotopoulos and Ángel RincónIn the present work we study the propagation of a probe minimally coupled scalar field in Einstein-power-Maxwell charged black hole background in ($1+2$) dimensions. We find analytical expressions for the reflection coefficient as well as for the absorption cross section in the low energy regime, an...
2018-04-16T10:00:00+00:00
Author(s): Nikolay Kozyrev, Sergey Krivonos, Olaf Lechtenfeld, Armen Nersessian, and Anton SutulinWe present $\mathcal{N}=4$ supersymmetric mechanics on $n$-dimensional Riemannian manifolds constructed within the Hamiltonian approach. The structure functions entering the supercharges and the Hamiltonian obey modified covariant constancy equations as well as modified Witten–Dijkgraaf–Verlinde–Ver...
2018-04-16T10:00:00+00:00
Author(s): Soumyadeep Chaudhuri, Victor I. Giraldo-Rivera, Anosh Joseph, R. Loganayagam, and Junggi YoonWe consider a chain of Abelian Klebanov-Tarnopolsky fermionic tensor models coupled through quartic nearest-neighbor interactions. We characterize the gauge-singlet spectrum for small chains ($L=2,3,4,5$) and observe that the spectral statistics exhibits strong evidence in favor of quasi-many-body l...