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# Recent Articles in Phys. Rev. D

## Recent articles in Physical Review D

Published: 2017-05-27T08:52:04-04:00

Parton-to-kaon fragmentation revisited

2017-05-26T10:00:00-04:00

Author(s): Daniel de Florian, Manuel Epele, Roger J. Hernández-Pinto, R. Sassot, and Marco Stratmann
We revisit the global QCD analysis of parton-to-kaon fragmentation functions at next-to-leading-order accuracy using the latest experimental information on single-inclusive kaon production in electron-positron annihilation, lepton-nucleon deep-inelastic scattering, and proton-proton collisions. An e…
[Phys. Rev. D 95, 094019] Published Fri May 26, 2017

Triple Regge exchange mechanisms of four-pion continuum production in the pp→ppπ^{+} π^{−} π^{+} π^{−} reaction

2017-05-26T10:00:00-04:00

Author(s): Radosław Kycia, Piotr Lebiedowicz, Antoni Szczurek, and Jacek Turnau
We consider exclusive multiperipheral production of four charged pions in proton-proton collisions at high energies with simultaneous exchange of three Pomerons/Reggeons. The amplitude(s) for the genuine 2→6 process are written in the Regge approach. The calculation is performed with the help of the…
[Phys. Rev. D 95, 094020] Published Fri May 26, 2017

Charmonium spectrum with a Dirac potential model in the momentum space

2017-05-26T10:00:00-04:00

Author(s): David Molina, Maurizio De Sanctis, and César Fernández-Ramírez
We study the charmonium spectrum using a complete one gluon exchange approach based on a phenomenological relativistic qq[over ¯] potential model with Dirac spinors in momentum space. We use phenomenological screening factors to include vacuum quantum effects. Our formulation does not rely on nonrel…
[Phys. Rev. D 95, 094021] Published Fri May 26, 2017

Uncovering the relation of a scalar resonance to the Higgs boson

2017-05-26T10:00:00-04:00

Author(s): Adrián Carmona, Florian Goertz, and Andreas Papaefstathiou
We consider the associated production of a scalar resonance with the standard model Higgs boson. We demonstrate via a realistic phenomenological analysis that couplings of such a resonance to the Higgs boson can be constrained in a meaningful way in future runs of the LHC, providing insights on its …
[Phys. Rev. D 95, 095022] Published Fri May 26, 2017

Anapole dark matter annihilation into photons

2017-05-26T10:00:00-04:00

Author(s): David C. Latimer
In models of anapole dark matter (DM), the DM candidate is a Majorana fermion whose primary interaction with standard model (SM) particles is through an anapole coupling to off-shell photons. As such, at tree-level, anapole DM undergoes p-wave annihilation into SM charged fermions via a virtual phot…
[Phys. Rev. D 95, 095023] Published Fri May 26, 2017

What are the low-Q and large-x boundaries of collinear QCD factorization theorems?

2017-05-26T10:00:00-04:00

Author(s): E. Moffat, W. Melnitchouk, T. C. Rogers, and N. Sato

Describing many applications in hadronic physics beyond certain kinematic regions where the factorization approximations no longer apply remains a challenge for quantum chromodynamics (QCD). Using a simplified, QCD-like theoretical model, the authors show that the boundaries of regions of applicability of QCD factorization methods may be pushed further.

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[Phys. Rev. D 95, 096008] Published Fri May 26, 2017

Efficient simulations of large-scale structure in modified gravity cosmologies with comoving Lagrangian acceleration

2017-05-26T10:00:00-04:00

Author(s): Georgios Valogiannis and Rachel Bean
We implement an adaptation of the cola approach, a hybrid scheme that combines Lagrangian perturbation theory with an N-body approach, to model nonlinear collapse in chameleon and symmetron modified gravity models. Gravitational screening is modeled effectively through the attachment of a suppressio…
[Phys. Rev. D 95, 103515] Published Fri May 26, 2017

Cosmological solutions with gravitational particle production and nonzero curvature

2017-05-26T10:00:00-04:00

Author(s): Andronikos Paliathanasis, John D. Barrow, and Supriya Pan
In a homogeneous and isotropic universe with nonzero spatial curvature we consider the effects of gravitational particle production in the dynamics of the universe. We show that the dynamics of the universe in such a background is characterized by a single nonlinear differential equation which is si…
[Phys. Rev. D 95, 103516] Published Fri May 26, 2017

Higher-order scheme-independent series expansions of γ_{ψ [over ¯] ψ,IR} and β_{IR}^{′} in conformal field theories

2017-05-26T10:00:00-04:00

Author(s): Thomas A. Ryttov and Robert Shrock
We study a vectorial asymptotically free gauge theory, with gauge group G and N_{f} massless fermions in a representation R of this group, that exhibits an infrared (IR) zero in its beta function, β, at the coupling α=α_{IR} in the non-Abelian Coulomb phase. For general G and R, we calculate the sch…
[Phys. Rev. D 95, 105004] Published Fri May 26, 2017

Effect of relativistic acceleration on continuous variable quantum teleportation and dense coding

2017-05-26T10:00:00-04:00

Author(s): Piotr T. Grochowski, Grzegorz Rajchel, Filip Kiałka, and Andrzej Dragan
We investigate how relativistic acceleration of the observers can affect the performance of the quantum teleportation and dense coding for continuous variable states of localized wave packets. Such protocols are typically optimized for symmetric resources prepared in an inertial frame of reference. …
[Phys. Rev. D 95, 105005] Published Fri May 26, 2017

Yang-Baxter σ-models, conformal twists, and noncommutative Yang-Mills theory

2017-05-26T10:00:00-04:00

Author(s): T. Araujo, I. Bakhmatov, E. Ó. Colgáin, J. Sakamoto, M. M. Sheikh-Jabbari, and K. Yoshida
The Yang-Baxter σ-model is a systematic way to generate integrable deformations of AdS_{5}×S^{5}. We recast the deformations as seen by open strings, where the metric is undeformed AdS_{5}×S^{5} with constant string coupling, and all information about the deformation is encoded in the noncommutative…
[Phys. Rev. D 95, 105006] Published Fri May 26, 2017

Entanglement entropy at CFT junctions

2017-05-26T10:00:00-04:00

Author(s): Michael Gutperle and John D. Miller
We consider entanglement through permeable junctions of N (1+1)-dimensional free boson and free fermion conformal field theories. In the folded picture we constrain the form of the general boundary state. We calculate replicated partition functions with interface operators inserted in the partially-…
[Phys. Rev. D 95, 106008] Published Fri May 26, 2017

Nucleon spin-averaged forward virtual Compton tensor at large Q^{2}

2017-05-25T10:00:00-04:00

Author(s): Richard J. Hill and Gil Paz
The nucleon spin-averaged forward virtual Compton tensor determines important physical quantities such as electromagnetically induced mass differences of nucleons and two-photon exchange contributions in hydrogen spectroscopy. It depends on two kinematic variables: ν, the virtual photon energy in th…
[Phys. Rev. D 95, 094017] Published Thu May 25, 2017

Quantum numbers of Ω_{c} states and other charmed baryons

2017-05-25T10:00:00-04:00

Author(s): Hai-Yang Cheng and Cheng-Wei Chiang
Possible spin-parity quantum numbers for excited charmed baryon resonances are discussed in this work. Our main results are as follows. (i) Among the five newly observed Ω_{c} states, we have identified Ω_{c}(3090) and Ω_{c}(3119) with radially excited 1/2^{+}(2S) and 3/2^{+}(2S) states, respectivel…
[Phys. Rev. D 95, 094018] Published Thu May 25, 2017

Erratum: Limits on nonlinear electrodynamics [Phys. Rev. D 93, 093020 (2016)]

2017-05-25T10:00:00-04:00

Author(s): M. Fouché, R. Battesti, and C. Rizzo
[Phys. Rev. D 95, 099902] Published Thu May 25, 2017

Polarizations of gravitational waves in f(R) gravity

2017-05-25T10:00:00-04:00

Author(s): Dicong Liang (梁迪聪), Yungui Gong (龚云贵), Shaoqi Hou (侯绍齐), and Yunqi Liu (刘云旗)
We point out that there are only three polarizations for gravitational waves in f(R) gravity, and the polarization due to the massive scalar mode is a mix of the pure longitudinal and transverse breathing polarization. The classification of the six polarizations by the Newman-Penrose quantities is b…
[Phys. Rev. D 95, 104034] Published Thu May 25, 2017

Iron Kα line of Kerr black holes with Proca hair

2017-05-25T10:00:00-04:00

Author(s): Menglei Zhou, Cosimo Bambi, Carlos A. R. Herdeiro, and Eugen Radu
We continue our study on the capabilities of present and future x-ray missions to test the nature of astrophysical black hole candidates via x-ray reflection spectroscopy and distinguish Kerr black holes from other solutions of 4-dimensional Einstein’s gravity in the presence of a matter field. Here…
[Phys. Rev. D 95, 104035] Published Thu May 25, 2017

Erratum: Propagation of test particles and scalar fields on a class of wormhole space-times [Phys. Rev. D 90, 024057 (2014)]

2017-05-25T10:00:00-04:00

Author(s): Peter Taylor
[Phys. Rev. D 95, 109904] Published Thu May 25, 2017

Analysis of P_{c}^{+} (4380) and P_{c}^{+} (4450) as pentaquark states in the molecular picture with QCD sum rules

2017-05-24T10:00:00-04:00

Author(s): K. Azizi, Y. Sarac, and H. Sundu
To better understand the nature and internal structure of the exotic states discovered by many collaborations, more information on their electromagnetic properties and their strong and weak interactions with other hadrons is needed. The residue or current coupling constant of these states together w…
[Phys. Rev. D 95, 094016] Published Wed May 24, 2017

Finite-representation approximation of lattice gauge theories at the continuum limit with tensor networks

2017-05-24T10:00:00-04:00

Author(s): Boye Buyens, Simone Montangero, Jutho Haegeman, Frank Verstraete, and Karel Van Acoleyen
It has been established that matrix product states can be used to compute the ground state and single-particle excitations and their properties of lattice gauge theories at the continuum limit. However, by construction, in this formalism the Hilbert space of the gauge fields is truncated to a finite…
[Phys. Rev. D 95, 094509] Published Wed May 24, 2017

Constraints on supersymmetric dark matter for heavy scalar superpartners

2017-05-24T10:00:00-04:00

Author(s): Peisi Huang, Roger A. Roglans, Daniel D. Spiegel, Yitian Sun, and Carlos E. M. Wagner
We study the constraints on neutralino dark matter in minimal low energy supersymmetry models and the case of heavy lepton and quark scalar superpartners. For values of the Higgsino and gaugino mass parameters of the order of the weak scale, direct detection experiments are already putting strong bo…
[Phys. Rev. D 95, 095021] Published Wed May 24, 2017

Internal delensing of cosmic microwave background acoustic peaks

2017-05-24T10:00:00-04:00

Author(s): Neelima Sehgal, Mathew S. Madhavacheril, Blake Sherwin, and Alexander van Engelen
We present a method to delens the acoustic peaks of the cosmic microwave background (CMB) temperature and polarization power spectra internally, using lensing maps reconstructed from the CMB itself. We find that when delensing CMB acoustic peaks with a lensing potential map derived from the same CMB…
[Phys. Rev. D 95, 103512] Published Wed May 24, 2017

Consistent cosmic bubble embeddings

2017-05-24T10:00:00-04:00

Author(s): S. Shajidul Haque and Bret Underwood
The Raychaudhuri equation for null rays is a powerful tool for finding consistent embeddings of cosmological bubbles in a background spacetime in a way that is largely independent of the matter content. We find that spatially flat or positively curved thin wall bubbles surrounded by a cosmological b…
[Phys. Rev. D 95, 103513] Published Wed May 24, 2017

CMB internal delensing with general optimal estimator for higher-order correlations

2017-05-24T10:00:00-04:00

Author(s): Toshiya Namikawa
We present a new method for delensing B modes of the cosmic microwave background (CMB) using a lensing potential reconstructed from the same realization of the CMB polarization (CMB internal delensing). The B-mode delensing is required to improve sensitivity to primary B modes generated by, e.g., th…
[Phys. Rev. D 95, 103514] Published Wed May 24, 2017

Corrections to Newton’s law of gravitation in the context of codimension-1 warped thick braneworlds

2017-05-24T10:00:00-04:00

Author(s): D. F. S. Veras and C. A. S. Almeida
In this work, we compute the corrections in Newton’s law of gravitation due to Kaluza-Klein gravitons in codimension-1 warped thick braneworld scenarios. We focus in some models recently proposed in the literature, the so-called asymmetric hybrid brane and compact brane. Such models are deformations…
[Phys. Rev. D 95, 104032] Published Wed May 24, 2017

Time-domain metric reconstruction for self-force applications

2017-05-24T10:00:00-04:00

Author(s): Leor Barack and Paco Giudice
We present a new method for calculation of the gravitational self-force (GSF) in Kerr geometry, based on a time-domain reconstruction of the metric perturbation from curvature scalars. In this approach, the GSF is computed directly from a certain scalarlike self-potential that satisfies the time-dom…
[Phys. Rev. D 95, 104033] Published Wed May 24, 2017

First measurement of T-odd moments in D^{0} →K_{S}^{0} π^{+} π^{−} π^{0} decays

2017-05-22T10:00:00-04:00

Author(s): K. Prasanth et al. (Belle Collaboration)
We report the first measurement of the T-odd moments in the decay D^{0}→K_{S}^{0}π^{+}π^{−}π^{0} from a data sample corresponding to an integrated luminosity of 966  fb^{−1} collected by the Belle experiment at the KEKB asymmetric-energy e^{+}e^{−} collider. From these moments we determine the CP-vi…
[Phys. Rev. D 95, 091101(R)] Published Mon May 22, 2017

Nuclear parton density functions from jet production in DIS at an EIC

2017-05-22T10:00:00-04:00

Author(s): M. Klasen, K. Kovařík, and J. Potthoff
We investigate the potential of inclusive-jet production in deep-inelastic scattering (DIS) at a future electron-ion collider (EIC) to improve our current knowledge of nuclear parton density functions (PDFs). We demonstrate that the kinematic reach is extended similarly to inclusive DIS, but that th…
[Phys. Rev. D 95, 094013] Published Mon May 22, 2017

Z(3) metastable states in a Polyakov quark meson model

2017-05-22T10:00:00-04:00

Author(s): Ranjita K. Mohapatra and Hiranmaya Mishra
We study the existence of Z(3) metastable states in the presence of the dynamical quarks within the ambit of a Polyakov quark meson (PQM) model. Within the parameters of the model, it is seen that for temperatures T_{m} greater than the chiral transition temperature T_{c}, Z(3) metastable states exi…
[Phys. Rev. D 95, 094014] Published Mon May 22, 2017

Collinear parton distributions and the structure of the nucleon sea in a light-front meson-cloud model

2017-05-22T10:00:00-04:00

Author(s): Stefan Kofler and Barbara Pasquini
The unpolarized, helicity and transversity parton distribution functions of the nucleon are studied within a convolution model where the bare nucleon is dressed by its virtual meson cloud. Using light-front time-ordered perturbation theory, the Fock states of the physical nucleon are expanded in a s…
[Phys. Rev. D 95, 094015] Published Mon May 22, 2017

Implications of the absence of high-mass radion signals

2017-05-22T10:00:00-04:00

Author(s): Aqeel Ahmed, Barry M. Dillon, Bohdan Grzadkowski, John F. Gunion, and Yun Jiang
Given the disappearance of the 750 GeV diphoton LHC signal and the absence of signals at high mass in this and other channels, significant constraints on the mixed Higgs-radion of the five-dimensional Randall-Sundrum model arise. By combining all channels, these constraints place a significant radio…
[Phys. Rev. D 95, 095019] Published Mon May 22, 2017

Strong CP problem and spontaneous generation of the CP violating phase in the CKM matrix

2017-05-22T10:00:00-04:00

Author(s): Wei Liao
We show that in a complementary two-Higgs doublet model (C2HDM) the CP violating phase in the Cabibbo-Kobayashi-Maskawa matrix can be generated spontaneously, dangerous flavor changing neutral currents (FCNC) can be naturally suppressed and the strong CP problem can also be avoided. The two Higgs do…
[Phys. Rev. D 95, 095020] Published Mon May 22, 2017

Breathers and nonlinear waves on open vortex filaments in the nonrelativistic Abelian Higgs model

2017-05-22T10:00:00-04:00

Author(s): Robert A. Van Gorder
We demonstrate the existence of various nonlinear waves along open vortex filaments in the nonrelativistic Abelian Higgs model. These include nonlinear waves, which give the birth and death of helical filaments, as well breathers, which modify the amplitude of helical filaments periodically in time.…
[Phys. Rev. D 95, 096007] Published Mon May 22, 2017

Twin stars within the SU(3) chiral quark-meson model

2017-05-22T10:00:00-04:00

Author(s): Andreas Zacchi, Laura Tolos, and Jürgen Schaffner-Bielich
We present new stable solutions of the Tolman-Oppenheimer-Volkoff equations for quark stars using a quark matter equation of state based on the SU(3) quark-meson model that exhibits the onset of the chiral phase transition. These new solutions appear as two stable branches in the mass-radius relatio…
[Phys. Rev. D 95, 103008] Published Mon May 22, 2017

Numerical evolutions of spherical Proca stars

2017-05-22T10:00:00-04:00

Author(s): Nicolas Sanchis-Gual, Carlos Herdeiro, Eugen Radu, Juan Carlos Degollado, and José A. Font
Vector boson stars, or Proca stars, have been recently obtained as fully nonlinear numerical solutions of the Einstein-(complex)-Proca system [1]. These are self-gravitating, everywhere nonsingular, horizonless Bose-Einstein condensates of a massive vector field, which resemble in many ways, but not…
[Phys. Rev. D 95, 104028] Published Mon May 22, 2017

Relativistic tidal acceleration of astrophysical jets

2017-05-22T10:00:00-04:00

Author(s): Donato Bini, Carmen Chicone, and Bahram Mashhoon
Within the framework of general relativity, we investigate the tidal acceleration of astrophysical jets relative to the central collapsed configuration (“Kerr source”). To simplify matters, we neglect electromagnetic forces throughout; however, these must be included in a complete analysis. The rest…
[Phys. Rev. D 95, 104029] Published Mon May 22, 2017

Action functional of the Cardassian universe

2017-05-22T10:00:00-04:00

Author(s): Xiang-hua Zhai, Rui-hui Lin, Chao-jun Feng, and Xin-zhou Li
It is known that the Cardassian universe is successful in describing the accelerated expansion of the universe, but its dynamic equations are hard to get from the action principle. In this paper, we establish the connection between the Cardassian universe and f(T,T) gravity, where T is the torsion s…
[Phys. Rev. D 95, 104030] Published Mon May 22, 2017

Loop quantum gravity simplicity constraint as surface defect in complex Chern-Simons theory

2017-05-22T10:00:00-04:00

Author(s): Muxin Han and Zichang Huang
The simplicity constraint is studied in the context of four-dimensional spinfoam models with a cosmological constant. We find that the quantum simplicity constraint is realized as the two-dimensional surface defect in SL(2,C) Chern-Simons theory in the construction of spinfoam amplitudes. By this re…
[Phys. Rev. D 95, 104031] Published Mon May 22, 2017

Renormalization group flow of entanglement entropy to thermal entropy

2017-05-22T10:00:00-04:00

Author(s): Ki-Seok Kim and Chanyong Park
Utilizing the holographic technique, we investigate how the entanglement entropy evolves along the renormalization group flow. After introducing a new generalized temperature which satisfies the thermodynamicslike law even in the IR regime, we find that the renormalized entropy and the generalized t…
[Phys. Rev. D 95, 106007] Published Mon May 22, 2017

Decay properties of P-wave charmed baryons from light-cone QCD sum rules

2017-05-19T10:00:00-04:00

Author(s): Hua-Xing Chen, Qiang Mao, Wei Chen, Atsushi Hosaka, Xiang Liu, and Shi-Lin Zhu
We study decay properties of the P-wave charmed baryons using the method of light-cone QCD sum rules, including the S-wave decays of the flavor 3[over ¯]_{F} P-wave charmed baryons into ground-state charmed baryons accompanied by a pseudoscalar meson (π or K) or a vector meson (ρ or K^{*}), and the …
[Phys. Rev. D 95, 094008] Published Fri May 19, 2017

Effective kinetic description of the expanding overoccupied glasma

2017-05-19T10:00:00-04:00

Author(s): Naoto Tanji and Raju Venugopalan
We report on a numerical study of the Boltzmann equation including 2↔2 scatterings of gluons and quarks in an overoccupied glasma undergoing longitudinal expansion. We find that when a cascade of gluon number to the infrared occurs, corresponding to an infrared enhancement analogous to a transient B…
[Phys. Rev. D 95, 094009] Published Fri May 19, 2017

Possible small-x effects in the Kaluza-Klein graviton and radion production at high energies

2017-05-19T10:00:00-04:00

Author(s): A. V. Lipatov and M. A. Malyshev
We study the single graviton production at the CERN LHC using the k_{T}-factorization approach of QCD. We consider the Arkani-Hamed-Dimopoulos-Dvali scenario and Randall-Sundrum model with one warped extra dimension and derive the production amplitudes for spin-2 (Kaluza-Klein excitation of the grav…
[Phys. Rev. D 95, 094010] Published Fri May 19, 2017

Multiquark study of exotic open bottom baryonic states

2017-05-19T10:00:00-04:00

Author(s): T. F. Caramés and A. Valcarce
We present a simultaneous study of baryon-meson systems containing a bottom degree of freedom, either as a quark or as an antiquark. This produces two different types of structures: the NB system, subject to quark antisymmetry effects and whose existence would generate explicit exotic states; and th…
[Phys. Rev. D 95, 094011] Published Fri May 19, 2017

Relativistic corrections to the form factors of B_{c} into S-wave charmonium

2017-05-19T10:00:00-04:00

Author(s): Ruilin Zhu, Yan Ma, Xin-Ling Han, and Zhen-Jun Xiao
We investigate the form factors of B_{c} meson into S-wave charmonium within the nonrelativistic QCD effective theory and obtain the next-to-leading order relativistic corrections to the form factors, where both the B_{c} meson and the charmonium are treated as the nonrelativistic bound states. Trea…
[Phys. Rev. D 95, 094012] Published Fri May 19, 2017

Hidden sector explanation of B-decay and cosmic-ray anomalies

2017-05-19T10:00:00-04:00

Author(s): James M. Cline, Jonathan M. Cornell, David London, and Ryoutaro Watanabe
There are presently several discrepancies in b→sℓ^{+}ℓ^{−} decays of B mesons suggesting new physics coupling to b quarks and leptons. We show that a Z^{′}, with couplings to quarks and muons that can explain the B-decay anomalies, can also couple to dark matter in a way that is consistent with its …
[Phys. Rev. D 95, 095015] Published Fri May 19, 2017

Naturalness, vacuum stability, and leptogenesis in the minimal seesaw model

2017-05-19T10:00:00-04:00

Author(s): Gulab Bambhaniya, P. S. Bhupal Dev, Srubabati Goswami, Subrata Khan, and Werner Rodejohann
The right-handed neutrinos within the type-I seesaw mechanism can induce large radiative corrections to the Higgs mass, and naturalness arguments can then be used to set limits on their mass scale and Yukawa couplings. Driven by minimality, we consider the presence of two degenerate right-handed neu…
[Phys. Rev. D 95, 095016] Published Fri May 19, 2017

Dark matter candidates in a visible heavy QCD axion model

2017-05-19T10:00:00-04:00

Author(s): Hajime Fukuda, Masahiro Ibe, and Tsutomu T. Yanagida
In this paper, we discuss dark matter candidates in a visible heavy QCD axion model. There, a mirror copied sector of the Standard Model with mass scales larger than the Standard Model is introduced. By larger mass scales of the mirrored sector, the QCD axion is made heavy via the axial anomaly in t…
[Phys. Rev. D 95, 095017] Published Fri May 19, 2017

Invisible decay of the Higgs boson in the context of a thermal and nonthermal relic in MSSM

2017-05-19T10:00:00-04:00

Author(s): Rahool Kumar Barman, Genevieve Bélanger, Biplob Bhattacherjee, Rohini Godbole, Gaurav Mendiratta, and Dipan Sengupta
We study the decay of 125 GeV Higgs boson to a pair of lightest neutralinos in the phenomenological minimal supersymmetric standard model in the context of collider searches and astrophysical experiments. We consider the parameter space for light neutralinos that can be probed via the invisible Higg…
[Phys. Rev. D 95, 095018] Published Fri May 19, 2017

3FGL J1924.8-1034: A spatially extended stable unidentified GeV source?

2017-05-19T10:00:00-04:00

Author(s): Zi-Qing Xia, Kai-Kai Duan, Shang Li, Yun-Feng Liang, Zhao-Qiang Shen, Chuan Yue, Yuan-Peng Wang, Qiang Yuan, Yi-Zhong Fan, Jian Wu, and Jin Chang
Milky Way–like galaxies are predicted to host a very large number of dark matter subhalos. Some massive and nearby subhalos could generate detectable gamma rays, appearing as unidentified, spatially extended and stable gamma-ray sources. We search for such sources in the third Fermi Large Area Teles…
[Phys. Rev. D 95, 102001] Published Fri May 19, 2017

Line-of-sight extrapolation noise in dust polarization

2017-05-19T10:00:00-04:00

Author(s): Jason Poh and Scott Dodelson
The B-modes of polarization at frequencies ranging from 50–1000 GHz are produced by Galactic dust, lensing of primordial E-modes in the cosmic microwave background (CMB) by intervening large scale structure, and possibly by primordial B-modes in the CMB imprinted by gravitational waves produced duri…
[Phys. Rev. D 95, 103511] Published Fri May 19, 2017

Magnetic monopoles from global monopoles in the presence of a Kalb-Ramond Field

2017-05-19T10:00:00-04:00

Author(s): Nick E. Mavromatos and Sarben Sarkar
A classical solution for electromagnetic monopoles induced by gravitational (global) monopoles in the presence of a (four-dimensional) Kalb-Ramond axion field is found. The magnetic charge of such a solution is induced by a nonzero Kalb-Ramond field strength, prevalent in string theory. Bounds from …
[Phys. Rev. D 95, 104025] Published Fri May 19, 2017

Observing binary black hole ringdowns by advanced gravitational wave detectors

2017-05-19T10:00:00-04:00

Author(s): Andrea Maselli, Kostas D. Kokkotas, and Pablo Laguna
The direct discovery of gravitational waves from compact binary systems leads for the first time to explore the possibility of black hole spectroscopy. Newly formed black holes produced by coalescing events are copious emitters of gravitational radiation, in the form of damped sinusoids, the quasino…
[Phys. Rev. D 95, 104026] Published Fri May 19, 2017

Gravitational radiation from compact binary systems in screened modified gravity

2017-05-19T10:00:00-04:00

Author(s): Xing Zhang, Tan Liu, and Wen Zhao
Screened modified gravity (SMG) is a kind of scalar-tensor theory with screening mechanisms, which can suppress the fifth force in dense regions and allow theories to evade the solar system and laboratory tests. In this paper, we investigate how the screening mechanisms in SMG affect the gravitation…
[Phys. Rev. D 95, 104027] Published Fri May 19, 2017

Publisher’s Note: Chiral primordial gravitational waves from dilaton induced delayed chromonatural inflation [Phys. Rev. D 93, 123502 (2016)]

2017-05-19T10:00:00-04:00

Author(s): Ippei Obata and Jiro Soda
[Phys. Rev. D 95, 109903] Published Fri May 19, 2017

Deconfinement, gradient, and cooling scales for pure SU(2) lattice gauge theory

2017-05-18T10:00:00-04:00

Author(s): Bernd A. Berg and David A. Clarke
We investigate the approach of pure SU(2) lattice gauge theory with the Wilson action to its continuum limit using the deconfining phase transition, the gradient flow and the cooling flow to set the scale. For the gradient and cooling scales we explore three different energy observables and two dist…
[Phys. Rev. D 95, 094508] Published Thu May 18, 2017

Particle asymmetries from quantum statistics

2017-05-18T10:00:00-04:00

Author(s): Nikita Blinov and Anson Hook
We consider a class of baryogenesis models where the Lagrangian in the visible sector is charge-parity (CP) invariant and a baryon asymmetry is produced only when quantum statistics is taken into account. The CP symmetry is broken by matter effects, namely the assumption that the primordial plasma c…
[Phys. Rev. D 95, 095014] Published Thu May 18, 2017

Quantum propagation across cosmological singularities

2017-05-18T10:00:00-04:00

Author(s): Steffen Gielen and Neil Turok
The initial singularity is the most troubling feature of the standard cosmology, which quantum effects are hoped to resolve. In this paper, we study quantum cosmology with conformal (Weyl) invariant matter. We show that it is natural to extend the scale factor to negative values, allowing a large, c…
[Phys. Rev. D 95, 103510] Published Thu May 18, 2017

Production of heavy Higgs bosons and decay into top quarks at the LHC. II. Top-quark polarization and spin correlation effects

2017-05-17T10:00:00-04:00

Author(s): W. Bernreuther, P. Galler, Z.-G. Si, and P. Uwer
We analyze, within several parameter scenarios of type-II two-Higgs doublet extensions of the standard model, the impact of heavy neutral Higgs-boson resonances on top-quark pair production and their subsequent decay to dileptonic final states at the LHC (13 TeV). In particular, we investigate the e…
[Phys. Rev. D 95, 095012] Published Wed May 17, 2017

Radiative electroweak symmetry breaking in standard model extensions

2017-05-17T10:00:00-04:00

Author(s): K. S. Babu, Ilia Gogoladze, and S. Khan
We study the possibility of radiative electroweak symmetry breaking where loop corrections to the mass parameter of the Higgs boson trigger the symmetry breaking in various extensions of the Standard Model (SM). Although the mechanism fails in the SM, it is shown to be quite successful in several ex…
[Phys. Rev. D 95, 095013] Published Wed May 17, 2017

Effects of rotation and boundaries on chiral symmetry breaking of relativistic fermions

2017-05-17T10:00:00-04:00

Author(s): M. N. Chernodub and Shinya Gongyo
In order to avoid unphysical causality-violating effects, any rigidly rotating system must be bounded in directions transverse to the axis of rotation. We demonstrate that this requirement implies substantial dependence of properties of the relativistically rotating system on the boundary conditions…
[Phys. Rev. D 95, 096006] Published Wed May 17, 2017

Unruh Effect in nonlocal field theories

2017-05-17T10:00:00-04:00

Author(s): Nirmalya Kajuri
We study the Unruh Effect for a wide class of nonlocal theories. Using the approach of Bogoliubov coefficients, we show that the Unruh Effect remains entirely unmodified in these theories. However, for those nonlocal theories which incorporate a minimal length, the approach using Unruh-DeWitt detect…
[Phys. Rev. D 95, 101701(R)] Published Wed May 17, 2017

Constraints on cosmological viscosity and self-interacting dark matter from gravitational wave observations

2017-05-17T10:00:00-04:00

Author(s): Gaurav Goswami, Girish Kumar Chakravarty, Subhendra Mohanty, and A. R. Prasanna
It has been shown that gravitational waves propagate through ideal fluids without experiencing any dispersion or dissipation. However, if the medium has a nonzero shear viscosity η, gravitational waves will be dissipated at a rate proportional to Gη. We constrain dark matter and dark energy models w…
[Phys. Rev. D 95, 103509] Published Wed May 17, 2017

A Surrogate model of gravitational waveforms from numerical relativity simulations of precessing binary black hole mergers

2017-05-17T10:00:00-04:00

Author(s): Jonathan Blackman, Scott E. Field, Mark A. Scheel, Chad R. Galley, Daniel A. Hemberger, Patricia Schmidt, and Rory Smith
We present the first surrogate model for gravitational waveforms from the coalescence of precessing binary black holes. We call this surrogate model NRSur4d2s. Our methodology significantly extends recently introduced reduced-order and surrogate modeling techniques, and is capable of directly modeli…
[Phys. Rev. D 95, 104023] Published Wed May 17, 2017

Thermogeometric description of the van der Waals like phase transition in AdS black holes

2017-05-17T10:00:00-04:00

Author(s): Krishnakanta Bhattacharya and Bibhas Ranjan Majhi
It is well known that by interpreting the cosmological constant as the pressure, the anti–de Sitter black holes behave as the van der Waals thermodynamic system. In this case, like a phase transition from vapor to liquid in a usual van der Waals system, black holes also change phases about a critica…
[Phys. Rev. D 95, 104024] Published Wed May 17, 2017

Covariantly quantum Galileon

2017-05-17T10:00:00-04:00

Author(s): Ippocratis D. Saltas and Vincenzo Vitagliano
We derive the 1–loop effective action of the cubic Galileon coupled to quantum-gravitational fluctuations in a background and gauge-independent manner, employing the covariant framework of DeWitt and Vilkovisky. Although the bare action respects shift symmetry, the coupling to gravity induces an eff…
[Phys. Rev. D 95, 105002] Published Wed May 17, 2017

Adiabatic regularization with a Yukawa interaction

2017-05-17T10:00:00-04:00

Author(s): Adrian del Rio, Antonio Ferreiro, Jose Navarro-Salas, and Francisco Torrenti
We extend the adiabatic regularization method for an expanding universe to include the Yukawa interaction between quantized Dirac fermions and a homogeneous background scalar field. We give explicit expressions for the renormalized expectation values of the stress-energy tensor ⟨T_{μν}⟩ and the bili…
[Phys. Rev. D 95, 105003] Published Wed May 17, 2017

Quadratic Feynman loop integrands from massless scattering equations

2017-05-17T10:00:00-04:00

Author(s): Humberto Gomez
Recently, the Cachazo-He-Yuan (CHY) approach has been extended to the loop level, but the resulting loop integrand has propagators that are linear in the loop momentum unlike Feynman’s. In this paper, we present a new technique that directly produces quadratic propagators identical to Feynman’s from…
[Phys. Rev. D 95, 106006] Published Wed May 17, 2017

Towers of positive parity excited baryons and their mixing in the large N_{c} limit

2017-05-16T10:00:00-04:00

Author(s): Cintia Willemyns and Carlos Schat
We consider configuration mixing for the nonstrange positive parity excited baryons in the [56^{′},0^{+}], [56,2^{+}], [70,0^{+}], and [70,2^{+}] quark model SU(6)×O(3) multiplets contained in the N=2 band. Starting from the effective mass operator for these states, we show by an explicit calculatio…
[Phys. Rev. D 95, 094007] Published Tue May 16, 2017

New approach to canonical partition functions computation in N_{f} =2 lattice QCD at finite baryon density

2017-05-16T10:00:00-04:00

Author(s): V. G. Bornyakov, D. L. Boyda, V. A. Goy, A. V. Molochkov, Atsushi Nakamura, A. A. Nikolaev, and V. I. Zakharov
We propose and test a new approach to computation of canonical partition functions in lattice QCD at finite density. We suggest a few steps procedure. We first compute numerically the quark number density for imaginary chemical potential iμ_{qI}. Then we restore the grand canonical partition functio…
[Phys. Rev. D 95, 094506] Published Tue May 16, 2017

Quantum simulation of (1+1)-dimensional U(1) gauge-Higgs model on a lattice by cold Bose gases

2017-05-16T10:00:00-04:00

Author(s): Yoshihito Kuno, Shinya Sakane, Kenichi Kasamatsu, Ikuo Ichinose, and Tetsuo Matsui
We present a theoretical study of quantum simulations of (1+1)-dimensional U(1) lattice gauge-Higgs models, which contain a compact U(1) gauge field and a Higgs matter field, by using ultracold bosonic gases on a one-dimensional optical lattice. Starting from the extended Bose-Hubbard model with on-…
[Phys. Rev. D 95, 094507] Published Tue May 16, 2017

Is the dark matter particle its own antiparticle?

2017-05-16T10:00:00-04:00

Author(s): Farinaldo S. Queiroz, Werner Rodejohann, and Carlos E. Yaguna
We propose a test based on direct detection data that allows us to determine if the dark matter particle is different from its antiparticle. The test requires the precise measurement of the dark matter spin-independent direct detection cross sections off three different nuclei and consists of interp…
[Phys. Rev. D 95, 095010] Published Tue May 16, 2017

Weak boson fusion at 100 TeV

2017-05-16T10:00:00-04:00

Author(s): Dorival Gonçalves, Tilman Plehn, and Jennifer M. Thompson
From the LHC runs we know that, with increasing collider energy, weak-boson-fusion Higgs production dominates as an environment for precision measurements. We show how a future hadron collider performs for three challenging benchmark signatures. Because all of these measurements rely on the tagging …
[Phys. Rev. D 95, 095011] Published Tue May 16, 2017

Lorentzian quantum cosmology

2017-05-16T10:00:00-04:00

Author(s): Job Feldbrugge, Jean-Luc Lehners, and Neil Turok
We argue that the Lorentzian path integral is a better starting point for quantum cosmology than its Euclidean counterpart. In particular, we revisit the minisuperspace calculation of the Feynman path integral for quantum gravity with a positive cosmological constant. Instead of rotating to Euclidea…
[Phys. Rev. D 95, 103508] Published Tue May 16, 2017

Generalized pp waves in Poincaré gauge theory

2017-05-16T10:00:00-04:00

Author(s): M. Blagojević and B. Cvetković
Starting from the generalized pp waves that are exact vacuum solutions of general relativity with a cosmological constant, we construct a new family of exact vacuum solutions of Poincaré gauge theory, the generalized pp waves with torsion. The ansatz for torsion is chosen in accordance with the wave…
[Phys. Rev. D 95, 104018] Published Tue May 16, 2017

Decoupling gravitational sources in general relativity: From perfect to anisotropic fluids

2017-05-16T10:00:00-04:00

Author(s): Jorge Ovalle
We show a simple, systematic and direct approach to decoupling gravitational sources in general relativity. As a direct application, a robust and simple way to generate anisotropic solutions for self-gravitating systems from perfect fluid solutions is presented.
[Phys. Rev. D 95, 104019] Published Tue May 16, 2017

Geodesics and the magnitude-redshift relation on cosmologically symmetric Finsler spacetimes

2017-05-16T10:00:00-04:00

Author(s): Manuel Hohmann and Christian Pfeifer
We discuss the geodesic motion of both massive test particles, following timelike geodesics, and light, following null geodesics, on Finsler spacetimes with cosmological symmetry. Using adapted coordinates on the tangent bundle of the spacetime manifold, we derive the general form of the geodesic eq…
[Phys. Rev. D 95, 104021] Published Tue May 16, 2017

Conserved charge of a gravity theory with p-form gauge fields and its property under Kaluza-Klein reduction

2017-05-16T10:00:00-04:00

Author(s): Jun-Jin Peng
In this paper, we investigate the conserved charges of generally diffeomorphism invariant gravity theories with a wide variety of matter fields, particularly of the theories with multiple scalar fields and p-form potentials, in the context of the off-shell generalized Abbott-Deser-Tekin (ADT) formal…
[Phys. Rev. D 95, 104022] Published Tue May 16, 2017

Quark orbital dynamics in the proton from lattice QCD: From Ji to Jaffe-Manohar orbital angular momentum

2017-05-15T10:00:00-04:00

Author(s): M. Engelhardt
Given a Wigner distribution simultaneously characterizing quark transverse positions and momenta in a proton, one can directly evaluate their cross product, i.e., quark orbital angular momentum. The aforementioned distribution can be obtained by generalizing the proton matrix elements of quark biloc…
[Phys. Rev. D 95, 094505] Published Mon May 15, 2017

Octant of θ_{23} at long baseline neutrino experiments in the light of nonunitary leptonic mixing

2017-05-15T10:00:00-04:00

Author(s): Debajyoti Dutta, Pomita Ghoshal, and Sandeep K. Sehrawat
The octant of the atmospheric mixing angle θ_{23} is still undetermined by neutrino oscillation experiments. Long-baseline experiments like NOνA, T2K, and DUNE offer good prospects for determining the octant of θ_{23}. However, their capability to do so may be compromised by the possible presence of…
[Phys. Rev. D 95, 095007] Published Mon May 15, 2017

Constraining secret gauge interactions of neutrinos by meson decays

2017-05-15T10:00:00-04:00

Author(s): P. Bakhti and Y. Farzan
Secret coupling of neutrinos to a new light vector boson, Z^{′}, with a mass smaller than 100 MeV is motivated within a myriad of scenarios which are designed to explain various anomalies in particle physics and cosmology. Due to the longitudinal component of the massive vector boson, the rates of t…
[Phys. Rev. D 95, 095008] Published Mon May 15, 2017

Minimal axion model from flavor

2017-05-15T10:00:00-04:00

Author(s): Lorenzo Calibbi, Florian Goertz, Diego Redigolo, Robert Ziegler, and Jure Zupan
We show that solving the flavor problem of the Standard Model with a simple U(1)_{H} flavor symmetry naturally leads to an axion that solves the strong CP problem and constitutes a viable Dark Matter candidate. In this framework, the ratio of the axion mass and its coupling to photons is related to …
[Phys. Rev. D 95, 095009] Published Mon May 15, 2017

Inflation from (R+γR^{n} −2Λ) gravity in higher dimensions

2017-05-15T10:00:00-04:00

Author(s): Sergei V. Ketov and Hiroshi Nakada
We propose a derivation of the inflaton scalar potential from the higher (D) dimensional (R+γR^{n}−2Λ) gravity, with the new coupling constant γ and the cosmological constant Λ. We assume that a compactification of extra dimensions happened before inflation, so that the inflaton scalar potential in …
[Phys. Rev. D 95, 103507] Published Mon May 15, 2017

Strong gravitational lensing for the photons coupled to a Weyl tensor in a Kerr black hole spacetime

2017-05-15T10:00:00-04:00

Author(s): Songbai Chen, Shangyun Wang, Yang Huang, Jiliang Jing, and Shiliang Wang
We present first the equation of motion for the photon coupled to a Weyl tensor in a Kerr black hole spacetime and then study further the corresponding strong gravitational lensing. We find that black hole rotation makes propagation of the coupled photons more complicated, which brings about some ne…
[Phys. Rev. D 95, 104017] Published Mon May 15, 2017

Manifestly local formulation of nonlocal approach to the cosmological constant problem

2017-05-15T10:00:00-04:00

Author(s): Ichiro Oda
We present a manifestly local and general coordinate invariant formulation of a nonlocal approach to the cosmological constant problem which has been recently proposed by Carroll and Remmen. To do that, we need to introduce a topological term involving a new 3-form gauge field. The equations of moti…
[Phys. Rev. D 95, 104020] Published Mon May 15, 2017

Soft hairy horizons in three spacetime dimensions

2017-05-15T10:00:00-04:00

Author(s): Hamid Afshar, Daniel Grumiller, Wout Merbis, Alfredo Perez, David Tempo, and Ricardo Troncoso
We discuss some aspects of soft hairy black holes and a new kind of “soft hairy cosmologies,” including a detailed derivation of the metric formulation, results on flat space, and novel observations concerning the entropy. Remarkably, like in the case with negative cosmological constant, we find tha…
[Phys. Rev. D 95, 106005] Published Mon May 15, 2017

Lattice corrections to the quark quasidistribution at one loop

2017-05-12T10:00:00-04:00

Author(s): Carl E. Carlson and Michael Freid
We calculate radiative corrections to the quark quasidistribution in lattice perturbation theory at one loop to leading orders in the lattice spacing. We also consider one-loop corrections in continuum Euclidean space. We find that the infrared behavior of the corrections in Euclidean and Minkowski …
[Phys. Rev. D 95, 094504] Published Fri May 12, 2017

Calculations of the dominant long-range, spin-independent contributions to the interaction energy between two nonrelativistic Dirac fermions from double-boson exchange of spin-0 and spin-1 bosons with spin-dependent couplings

2017-05-12T10:00:00-04:00

Author(s): S. Aldaihan, D. E. Krause, J. C. Long, and W. M. Snow
Various theories beyond the Standard Model predict new particles with masses in the sub-eV range with very weak couplings to ordinary matter which can possess spin-dependent couplings to electrons and nucleons. Present laboratory constraints on exotic spin-dependent interactions with pseudoscalar an…
[Phys. Rev. D 95, 096005] Published Fri May 12, 2017

Redshift drift of gravitational lensing

2017-05-12T10:00:00-04:00

Author(s): Oliver F. Piattella and Leonardo Giani
We investigate the effect of the redshift drift in strong gravitational lensing. The redshift drift produces a time variation of (i) the apparent position of a lensed source and (ii) the time delay among incoming signals from different images. We dub these effects as angular drift and time delay dri…
[Phys. Rev. D 95, 101301(R)] Published Fri May 12, 2017

Fast neutrino conversions: Ubiquitous in compact binary merger remnants

2017-05-12T10:00:00-04:00

Author(s): Meng-Ru Wu and Irene Tamborra
The massive neutron star (NS) or black hole (BH) accretion disk resulting from NS–NS or NS–BH mergers is dense in neutrinos. We present the first study on the role of angular distributions in the neutrino flavor conversion above the remnant disk. In particular, we focus on “fast” pairwise conversion…
[Phys. Rev. D 95, 103007] Published Fri May 12, 2017

Reheating era leptogenesis in models with a seesaw mechanism

2017-05-12T10:00:00-04:00

Author(s): Yuta Hamada, Koji Tsumura, and Daiki Yasuhara
Observed baryon asymmetry can be achieved not only by the decay of right-handed neutrinos but also by the scattering processes in the reheating era. In the latter scenario, new physics in high energy scale does not need to be specified, but only two types of the higher dimensional operator of the st…
[Phys. Rev. D 95, 103505] Published Fri May 12, 2017

Tachyon inflation with steep potentials

2017-05-12T10:00:00-04:00

Author(s): K. Rezazadeh, K. Karami, and S. Hashemi
Within the framework of tachyon inflation, we consider different steep potentials and check their viability in light of the Planck 2015 data. We see that in this scenario, the inverse power-law potential V(ϕ)=V_{0}(ϕ/ϕ_{0})^{−n} with n=2 leads to the power-law inflation with the scale factor a(t)∝t^…
[Phys. Rev. D 95, 103506] Published Fri May 12, 2017

Causality in 3D massive gravity theories

2017-05-12T10:00:00-04:00

Author(s): José D. Edelstein, Gaston Giribet, Carolina Gómez, Ercan Kilicarslan, Matías Leoni, and Bayram Tekin
We study the constraints coming from the local causality requirement in various 2+1 dimensional dynamical theories of gravity. In topologically massive gravity, with a single parity noninvariant massive degree of freedom, and in new massive gravity, with two massive spin-2 degrees of freedom, causal…
[Phys. Rev. D 95, 104016] Published Fri May 12, 2017

Improved measurements of branching fractions for η_{c} →ϕϕ and ωϕ

2017-05-11T10:00:00-04:00

Author(s): M. Ablikim et al. (BESIII Collaboration)
Using (223.7±1.4)×10^{6} J/ψ events accumulated with the BESIII detector, we study η_{c} decays to ϕϕ and ωϕ final states. The branching fraction of η_{c}→ϕϕ is measured to be Br(η_{c}→ϕϕ)=(2.5±0.3_{−0.7}^{+0.3}±0.6)×10^{−3}, where the first uncertainty is statistical, the second is systematic, and …
[Phys. Rev. D 95, 092004] Published Thu May 11, 2017

Novel all-orders single-scale approach to QCD renormalization scale-setting

2017-05-11T10:00:00-04:00

Author(s): Jian-Ming Shen, Xing-Gang Wu, Bo-Lun Du, and Stanley J. Brodsky
The principle of maximal conformality (PMC) provides a rigorous method for eliminating renormalization scheme-and-scale ambiguities for perturbative QCD (pQCD) predictions. The PMC uses the renormalization group equation to fix the β pattern of each order in an arbitrary pQCD approximant, and it the…
[Phys. Rev. D 95, 094006] Published Thu May 11, 2017

Higher order quark number fluctuations via imaginary chemical potentials in N_{f} =2+1 QCD

2017-05-11T10:00:00-04:00

Author(s): Massimo D’Elia, Giuseppe Gagliardi, and Francesco Sanfilippo
We discuss analytic continuation as a tool to extract the cumulants of the quark number fluctuations in the strongly interacting medium from lattice QCD simulations at imaginary chemical potentials. The method is applied to N_{f}=2+1 QCD, discretized with stout improved staggered fermions, physical …
[Phys. Rev. D 95, 094503] Published Thu May 11, 2017

Equivalence between bumblebee models and electrodynamics in a nonlinear gauge

2017-05-11T10:00:00-04:00

Author(s): C. A. Escobar and A. Martín-Ruiz
Bumblebee models are effective field theories describing a vector field with a nonzero vacuum expectation value that spontaneously breaks Lorentz invariance. They provide an alternative way of exploring the similarities between theories with spontaneous Lorentz symmetry breaking and gauge theories. …
[Phys. Rev. D 95, 095006] Published Thu May 11, 2017

Constraining the general reheating phase in the α-attractor inflationary cosmology

2017-05-11T10:00:00-04:00

Author(s): Alessandro Di Marco, Paolo Cabella, and Nicola Vittorio
In this paper we constrain some aspects of the general postinflationary phase in the context of superconformal α-attractor models of inflation. In particular, we provide constraints on the duration of the reheating process, N_{reh}, and on the reheating temperature, T_{reh}, simulating possible and …
[Phys. Rev. D 95, 103502] Published Thu May 11, 2017

Thermal inflation with a thermal waterfall scalar field coupled to a light spectator scalar field

2017-05-11T10:00:00-04:00

Author(s): Konstantinos Dimopoulos, David H. Lyth, and Arron Rumsey
A new model of thermal inflation is introduced, in which the mass of the thermal waterfall field is dependent on a light spectator scalar field. Using the δN formalism, the “end of inflation” scenario is investigated in order to ascertain whether this model is able to produce the dominant contributi…
[Phys. Rev. D 95, 103503] Published Thu May 11, 2017

How the huge energy of quantum vacuum gravitates to drive the slow accelerating expansion of the Universe

2017-05-11T10:00:00-04:00

Author(s): Qingdi Wang, Zhen Zhu, and William G. Unruh

The authors consider a free massless scalar field as a quantum field theory defined with a cut-off $\mathrm{\Lambda }$, but without renormalization of its operators (energy density etc.). Treating the resulting, order ${\mathrm{\Lambda }}^{4}$ vacuum fluctuations in the energy density as a stochastic classical source for the Einstein equations, it is argued that today’s Hubble expansion is exponentially suppressed, without the need for a fine-tuned cosmological constant.

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[Phys. Rev. D 95, 103504] Published Thu May 11, 2017

Effects of magnetic field topology in black hole-neutron star mergers: Long-term simulations

2017-05-11T10:00:00-04:00

Author(s): Mew-Bing Wan
We report long-term simulations of black hole-neutron star binary mergers where the neutron star possesses an asymmetric magnetic field dipole. Focusing on the scenario where the neutron star is tidally disrupted by the black hole, we track the evolution of the binary up to ≈100  ms after the merger…
[Phys. Rev. D 95, 104013] Published Thu May 11, 2017