当前期刊: Physics Letters B Go to current issue    加入关注   
显示样式:        排序: IF: - GO 导出
我的关注
我的收藏
您暂时未登录!
登录
  • Tachyon field in loop cosmology
    Phys. Lett. B (IF 4.384) Pub Date : 2020-10-15
    Kui Xiao

    The evolutionary pictures of tachyon field in modified loop cosmology have been investigated. We present the dynamical behavior of the tachyon field associated with an exponential potential and find that the pre-inflation dynamics are very similar in both modified loop cosmology and standard loop quantum cosmology. In addition, tachyonic inflation in modified loop cosmology models are discussed, and

    更新日期:2020-10-21
  • Spectra of cosmic ray carbon and oxygen nuclei according to the NUCLEON experiment
    Phys. Lett. B (IF 4.384) Pub Date : 2020-10-15
    D. Karmanov; I. Kovalev; I. Kudryashov; A. Kurganov; A. Panov; D. Podorozhny; A. Turundaevskiy; O. Vasiliev

    The aim of the NUCLEON space was to measure spectra of high-energy cosmic rays. The cosmic ray acceleration and propagation processes are determined by the magnetic rigidities of the particles. Thus the magnetic rigidity spectra of cosmic ray carbon and oxygen nuclei obtained by the NUCLEON experiment are analyzed and compared to some other experimental results. The spectral indices calculated for

    更新日期:2020-10-21
  • Multiphonon longitudinal wobbling in 127Xe
    Phys. Lett. B (IF 4.384) Pub Date : 2020-10-15
    S. Chakraborty; H.P. Sharma; S.S. Tiwary; C. Majumder; A.K. Gupta; P. Banerjee; S. Ganguly; S. Rai; Pragati; Mayank; S. Kumar; A. Kumar; R. Palit; S.S. Bhattacharjee; R.P. Singh; S. Muralithar

    A family of four odd parity bands in 127Xe has been investigated via in-beam γ-ray spectroscopy and conclusive evidence for the first and second phonon longitudinal wobbling excitations has been found. Spectroscopic measurements confirm the predominant E2 character of the ΔI=1 transitions between the wobbling bands. This provides the first experimental evidence of longitudinal wobbling mode associated

    更新日期:2020-10-21
  • Evidence for shape coexistence and superdeformation in 24Mg
    Phys. Lett. B (IF 4.384) Pub Date : 2020-10-16
    J.T.H. Dowie; T. Kibédi; D.G. Jenkins; A.E. Stuchbery; A. Akber; H.A. Alshammari; N. Aoi; A. Avaa; L.J. Bignell; M.V. Chisapi; B.J. Coombes; T.K. Eriksen; M.S.M. Gerathy; T.J. Gray; T.H. Hoang; E. Ideguchi; P. Jones; M. Kumar Raju; B.P.E. Tee

    The E0 transition depopulating the first-excited 0+ state in 24Mg has been observed for the first time, and the E0 transition strength determined by electron-positron pair and γ-ray spectroscopy measurements performed using the Super-e pair spectrometer. The E0 transition strength is ρ2×103=380(70). A two-state mixing model implies a deformation of the first-excited 0+ state of β2≈1 and a change in

    更新日期:2020-10-21
  • Constraining EDM and MDM lepton dimension-five interactions in the electroweak sector
    Phys. Lett. B (IF 4.384) Pub Date : 2020-10-02
    Jonas B. Araujo; Victor E. Mouchrek-Santos; Frederico E.P. dos Santos; Pedro D.S. Silva; Manoel M. Ferreira

    We investigate dimension-five Lorentz-violating (LV) nonminimal interactions in the electroweak sector, in connection with the possible generation of electric dipole moment (EDM), weak electric dipole moment (WEDM), magnetic dipole moment (MDM) and weak magnetic dipole moment (WMDM) for leptons. These couplings are composed of the physical fields in the Standard Model and LV tensors of ranks ranging

    更新日期:2020-10-21
  • Molecular picture for the X0(2866) as a D⁎K¯⁎ JP = 0+ state and related 1+,2+ states
    Phys. Lett. B (IF 4.384) Pub Date : 2020-10-16
    R. Molina; E. Oset

    We recall the predictions made ten years ago about a bound state of JP=0+ in I=0 of the D⁎K¯⁎ system, which is manifestly exotic, and we associate it to the X0(2866) state reported in the recent LHCb experiment. Fine tuning the parameters to reproduce exactly the mass and width of the X0(2866) state, we report two more states stemming from the same interaction, one with 1+ and the other with 2+. For

    更新日期:2020-10-21
  • Symmetry energy effect on emissions of light particles in coincidence with fast fission
    Phys. Lett. B (IF 4.384) Pub Date : 2020-10-15
    Qianghua Wu; Fenhai Guan; Xinyue Diao; Yijie Wang; Yingxun Zhang; Zhuxia Li; Xizhen Wu; Artur Dobrowolski; Krzysztof Pomorski; Zhigang Xiao

    The emission of light particles in coincidence with fast fission in near peripheral reactions of 40Ar+197Au at 30 MeV/u beam energy has been studied by using the Improved Quantum Molecular Dynamics Model (ImQMD). It is demonstrated that in the symmetrical fast fission of the heavy target-like fragment (TLF), the emission of the coalescence-invariant neutrons (CIN) is enhanced particularly at large

    更新日期:2020-10-21
  • Leptonic new force and cosmic-ray boosted dark matter for the XENON1T excess
    Phys. Lett. B (IF 4.384) Pub Date : 2020-10-15
    Yongsoo Jho; Jong-Chul Park; Seong Chan Park; Po-Yan Tseng

    The recently reported excess in XENON1T is explained by new leptonic forces, which are free from gauge anomalies. We focus on two scenarios with and without dark matter. In Scenario #1, the gauge boson of gauged lepton number U(1)Le−Lj, j=μ or τ provides non-standard interaction between solar neutrino and electron that enhances the number of electron recoil events in the XENON1T detector. In Scenarino

    更新日期:2020-10-21
  • Ω-dibaryon production with hadron interaction potential from the lattice QCD in relativistic heavy-ion collisions
    Phys. Lett. B (IF 4.384) Pub Date : 2020-10-16
    Song Zhang; Yu-Gang Ma

    Recently the HAL QCD Collaboration reported the Ω−Ω and N−Ω interaction potentials by the lattice QCD simulations. Based on these results, NΩ (S25) and ΩΩ (S01) bound states were predicted with the binding energy about a few MeV. In addition, N−Ω HBT correlation function was also measured by the STAR Collaboration as well as the ALICE Collaboration. These results provide dynamical information whether

    更新日期:2020-10-21
  • Asymptotic normalization coefficient method for two-proton radiative capture
    Phys. Lett. B (IF 4.384) Pub Date : 2020-10-14
    L.V. Grigorenko; Yu.L. Parfenova; N.B. Shulgina; M.V. Zhukov

    The method of asymptotic normalization coefficients is a standard approach for studies of two-body non-resonant radiative capture processes in nuclear astrophysics. This method suggests a fully analytical description of the radiative capture cross section in the low-energy region of the astrophysical interest. We demonstrate how this method can be generalized to the case of three-body 2p radiative

    更新日期:2020-10-21
  • Pion magnetic polarisability using the background field method
    Phys. Lett. B (IF 4.384) Pub Date : 2020-10-15
    Ryan Bignell; Waseem Kamleh; Derek Leinweber

    The magnetic polarisability is a fundamental property of hadrons, which provides insight into their structure in the low-energy regime. The pion magnetic polarisability is calculated using lattice QCD in the presence of background magnetic fields. The results presented are facilitated by the introduction of a new magnetic-field dependent quark-propagator eigenmode projector and the use of the background-field

    更新日期:2020-10-21
  • A fast centrality-meter for heavy-ion collisions at the CBM experiment
    Phys. Lett. B (IF 4.384) Pub Date : 2020-10-20
    Manjunath Omana Kuttan; Jan Steinheimer; Kai Zhou; Andreas Redelbach; Horst Stoecker

    A new method of event characterization based on Deep Learning is presented. The PointNet models can be used for fast, online event-by-event impact parameter determination at the CBM experiment. For this study, UrQMD and the CBM detector simulation are used to generate Au+Au collision events at 10 AGeV which are then used to train and evaluate PointNet based architectures. The models can be trained

    更新日期:2020-10-21
  • A new method for detecting axion with cylindrical superconductor
    Phys. Lett. B (IF 4.384) Pub Date : 2020-10-20
    Aiichi Iwazaki

    We propose a method for searching dark matter axion in axion-photon conversion. We consider a superconductor of cylindrical shape under strong magnetic field. The dark matter axion generates oscillating electric field which induces oscillating superconducting current in the surface of the superconductor. The current gives rise to dipole radiation with the frequency ma/2π given by axion mass ma. We

    更新日期:2020-10-21
  • Mapping pp→A→ZH→l+l−bb¯ and pp→H→ZA→l+l−bb¯ current and future searches onto 2HDM parameter spaces
    Phys. Lett. B (IF 4.384) Pub Date : 2020-10-08
    Souad Semlali; Henry Day-Hall; Stefano Moretti; Rachid Benbrik

    By borrowing the results from a Large Hadron Collider (LHC) analysis performed with 36.1fb−1 of Run 2 data intended to search for A production followed by ZH decay in turn yielding l+l−bb¯ (l=e,μ) final states in the context of the standard four Yukawa types of the 2-Higgs Doublet Model (2HDM), we recast it in terms of sensitivity reaches for the similar process pp→H→ZA→l+l−bb¯. This simple exercise

    更新日期:2020-10-19
  • Sensitivity of transfer cross sections to the bound-state wave functions
    Phys. Lett. B (IF 4.384) Pub Date : 2020-10-19
    Shubhchintak; P. Descouvemont

    We test the sensitivity of transfer reactions to the bound state wave functions within a distorted wave Born approximation formalism. Using supersymmetric transformations, we remove the Pauli-forbidden states from the two-body potentials and generate an equivalent supersymmetric partner. Wave functions from these potentials have the same asymptotics, but they differ in the nuclear interior. This allows

    更新日期:2020-10-19
  • On universal constants of AdS black holes from Hawking-Page phase transition
    Phys. Lett. B (IF 4.384) Pub Date : 2020-10-19
    Adil Belhaj; Anas El Balali; Wijdane El Hadri; Emilio Torrente-Lujan

    We investigate the thermodynamic properties of the Hawking-Page phase transition of AdS black holes. We present evidence for the existence of two universal critical constants associated with the Hawking-Page (HP) and minimum black hole thermodynamical transition points. These constants are defined by CS=SHP−SminSmin and CT=THP−TminTmin where Smin(SHP) and Tmin(THP) are the minimal (HP phase transition)

    更新日期:2020-10-19
  • Background magnetic field and quantum correlations in the Schwinger effect
    Phys. Lett. B (IF 4.384) Pub Date : 2020-10-19
    Sourav Bhattacharya; Shankhadeep Chakrabortty; Hironori Hoshino; Shagun Kaushal

    In this work we consider two complex scalar fields distinguished by their masses coupled to constant background electric and magnetic fields in the (3+1)-dimensional Minkowski spacetime and subsequently investigate a few measures quantifying the quantum correlations between the created particle-antiparticle Schwinger pairs. Since the background magnetic field itself cannot cause the decay of the Minkowski

    更新日期:2020-10-19
  • Spectroscopy of proton-rich 79Zr: Mirror energy differences in the highly-deformed fpg shell
    Phys. Lett. B (IF 4.384) Pub Date : 2020-10-19
    R.D.O. Llewellyn; M.A. Bentley; R. Wadsworth; J. Dobaczewski; W. Satuła; H. Iwasaki; G. de Angelis; J. Ash; D. Bazin; P.C. Bender; B. Cederwall; B.P. Crider; M. Doncel; R. Elder; B. Elman; A. Gade; M. Grinder; T. Haylett; D. Weisshaar

    Energy differences between isobaric analogue states have been extracted for the A=79, 79Zr/79Y mirror pair following their population via nucleon-knockout reactions from intermediate-energy rare-isotope beams. These are the heaviest nuclei where such measurements have been made to date. The deduced mirror energy differences (MED) are compared with predictions from a new density-functional based approach

    更新日期:2020-10-19
  • One residue to rule them all: Electroweak symmetry breaking, inflation and field-space geometry
    Phys. Lett. B (IF 4.384) Pub Date : 2020-10-19
    Georgios K. Karananas; Marco Michel; Javier Rubio

    We point out that the successful generation of the electroweak scale via gravitational instanton configurations in certain scalar-tensor theories can be viewed as the aftermath of a simple requirement: the existence of a quadratic pole with a sufficiently small residue in the Einstein-frame kinetic term for the Higgs field. In some cases, the inflationary dynamics may also be controlled by this residue

    更新日期:2020-10-19
  • GANs for generating EFT models
    Phys. Lett. B (IF 4.384) Pub Date : 2020-10-09
    Harold Erbin; Sven Krippendorf

    We initiate a way of generating effective field theories (EFT) models by the computer, satisfying both experimental and theoretical constraints. We use Generative Adversarial Networks (GAN) and display generated instances which go beyond the examples known to the machine during training. As a starting point, we apply this idea to the generation of supersymmetric field theories with a single field.

    更新日期:2020-10-17
  • Different polarization definitions in same-sign WW scattering at the LHC
    Phys. Lett. B (IF 4.384) Pub Date : 2020-10-17
    Alessandro Ballestrero; Ezio Maina; Giovanni Pelliccioli

    We study the polarization of positively charged W's in the scattering of massive electroweak bosons at hadron colliders. We rely on the separation of weak boson polarizations in the gauge-invariant, doubly-resonant part of the amplitude in Monte Carlo simulations. Polarizations depend on the reference frame in which they are defined. We discuss the change in polarization fractions and in kinematic

    更新日期:2020-10-17
  • Dark matter capture by atomic nuclei
    Phys. Lett. B (IF 4.384) Pub Date : 2020-10-16
    Bartosz Fornal; Benjamín Grinstein; Yue Zhao

    We propose a new strategy to search for a particular type of dark matter via nuclear capture. If the dark matter particle carries baryon number, as motivated by a class of theoretical explanations of the matter-antimatter asymmetry of the universe, it can mix with the neutron and be captured by an atomic nucleus. The resulting state de-excites by emitting a single photon or a cascade of photons with

    更新日期:2020-10-17
  • An analytic study on the excited states of holographic superconductors
    Phys. Lett. B (IF 4.384) Pub Date : 2020-10-16
    Xiongying Qiao; Dong Wang; Liang OuYang; Mengjie Wang; Qiyuan Pan; Jiliang Jing

    Based on the Sturm-Liouville eigenvalue problem, we develop a general analytic technique to investigate the excited states of the holographic superconductors. By including more higher order terms in the expansion of the trial function, we observe that the analytic results agree well with the numeric data, which indicates that the Sturm-Liouville method is very powerful to study the holographic superconductors

    更新日期:2020-10-17
  • Connecting fluctuation measurements in heavy-ion collisions with the grand-canonical susceptibilities
    Phys. Lett. B (IF 4.384) Pub Date : 2020-10-16
    Volodymyr Vovchenko; Oleh Savchuk; Roman V. Poberezhnyuk; Mark I. Gorenstein; Volker Koch

    We derive the relation between cumulants of a conserved charge measured in a subvolume of a thermal system and the corresponding grand-canonical susceptibilities, taking into account exact global conservation of that charge. The derivation is presented for an arbitrary equation of state, with the assumption that the subvolume is sufficiently large to be close to the thermodynamic limit. Our framework

    更新日期:2020-10-17
  • Measurement of groomed jet substructure observables in p+p collisions at s=200 GeV with STAR
    Phys. Lett. B (IF 4.384) Pub Date : 2020-10-15
    J. Adam; L. Adamczyk; J.R. Adams; J.K. Adkins; G. Agakishiev; M.M. Aggarwal; Z. Ahammed; I. Alekseev; D.M. Anderson; A. Aparin; E.C. Aschenauer; M.U. Ashraf; F.G. Atetalla; A. Attri; G.S. Averichev; V. Bairathi; K. Barish; A. Behera; M. Zyzak

    In this letter, measurements of the shared momentum fraction (zg) and the groomed jet radius (Rg), as defined in the SoftDrop algorithm, are reported in p+p collisions at s=200 GeV collected by the STAR experiment. These substructure observables are differentially measured for jets of varying resolution parameters from R=0.2−0.6 in the transverse momentum range 15

    更新日期:2020-10-16
  • A radiative seesaw model linking to XENON1T anomaly
    Phys. Lett. B (IF 4.384) Pub Date : 2020-10-15
    Jongkuk Kim; Takaaki Nomura; Hiroshi Okada

    We propose an attractive model that excess of electron recoil events around 1-5 keV reported by the XENON1T collaboration nicely links to the tiny neutrino masses based on a radiative seesaw scenario. Our dark matter (DM) is an isospin singlet inert boson that plays an role in generating non-vanishing neutrino mass at one-loop level, and this DM inelastically interacts with a pair of electrons at one-loop

    更新日期:2020-10-16
  • A new mechanism for freezing extra dimensions with higher-order curvature terms
    Phys. Lett. B (IF 4.384) Pub Date : 2020-10-15
    Hiroaki W.H. Tahara; Tsutomu Kobayashi; Jun'ichi Yokoyama

    We construct a model of higher dimensional cosmology in which extra dimensions are frozen by virtue of the cubic-order Lovelock gravity throughout the cosmic history from inflation to the present with radiation and matter-dominated regimes in between.

    更新日期:2020-10-16
  • A fully microscopic model of total level density in spherical nuclei
    Phys. Lett. B (IF 4.384) Pub Date : 2020-10-15
    N. Quang Hung; N. Dinh Dang; L. Tan Phuc; N. Ngoc Anh; T. Dong Xuan; T.V. Nhan Hao

    A fully microscopic model for the description of nuclear level density (NLD) in spherical nuclei is proposed. The model is derived by combining the partition function of the exact pairing solution plus the independent-particle model at finite temperature (EP+IPM) with that obtained by using the collective vibrational states calculated from the self-consistent Hartree-Fock mean field with MSk3 interaction

    更新日期:2020-10-16
  • Model independent tests of the Kerr bound with extreme mass ratio inspirals
    Phys. Lett. B (IF 4.384) Pub Date : 2020-10-15
    Gabriel Andres Piovano; Andrea Maselli; Paolo Pani

    An outstanding prediction of general relativity is the fact that the angular momentum S of an isolated black hole with mass μ is limited by the Kerr bound, S≤Gμ2/c. Testing this cornerstone is challenging due to the difficulty in modelling spinning compact objects that violate this bound. We argue that precise, model-independent tests can be achieved by measuring gravitational waves from an extreme

    更新日期:2020-10-16
  • Particle collisions near static spherically symmetric black holes
    Phys. Lett. B (IF 4.384) Pub Date : 2020-10-07
    Eva Hackmann; Hemwati Nandan; Pankaj Sheoran

    It has been shown by Bañados, Silk and West (BSW) that the center of mass energy (Ecm) of test particles starting from rest at infinity and colliding near the horizon of a Schwarzschild black hole is always finite. In this short note, we extent the BSW scenario and study two particles with different energies colliding near the horizon of a static spherically symmetric black hole. Interestingly, we

    更新日期:2020-10-13
  • XENON1T excess in local Z2 DM models with light dark sector
    Phys. Lett. B (IF 4.384) Pub Date : 2020-10-06
    Seungwon Baek; Jongkuk Kim; P. Ko

    Recently XENON1T Collaboration announced that they observed some excess in the electron recoil energy around a 2–3 keV. We show that this excess can be interpreted as exothermic scattering of excited dark matter on atomic electron through dark photon exchange. We consider DM models with local dark U(1) gauge symmetry that is spontaneously broken into its Z2 subgroup by Krauss-Wilczek mechanism. In

    更新日期:2020-10-13
  • Effect of torsion on the radiation fields in curved spacetime
    Phys. Lett. B (IF 4.384) Pub Date : 2020-09-16
    Susobhan Mandal

    The torsion-free connection is one of the important assumptions in Einstein's General theory of Relativity which has not been verified so far from experimental observation. In this article, the effect of torsion on the on-shell action of radiation fields in curved spacetime is reported in order to show certain consequences and possible ways to probe torsion in curved spacetime. In order to describe

    更新日期:2020-10-13
  • Eigenvector continuation as an efficient and accurate emulator for uncertainty quantification
    Phys. Lett. B (IF 4.384) Pub Date : 2020-09-30
    S. König; A. Ekström; K. Hebeler; D. Lee; A. Schwenk

    First principles calculations of atomic nuclei based on microscopic nuclear forces derived from chiral effective field theory (EFT) have blossomed in the past years. A key element of such ab initio studies is the understanding and quantification of systematic and statistical errors arising from the omission of higher-order terms in the chiral expansion as well as the model calibration. While there

    更新日期:2020-10-13
  • Quantum-corrected scattering and absorption of a Schwarzschild black hole with GUP
    Phys. Lett. B (IF 4.384) Pub Date : 2020-10-08
    M.A. Anacleto; F.A. Brito; J.A.V. Campos; E. Passos

    In this paper we have implemented quantum corrections for the Schwarzschild black hole metric using the generalized uncertainty principle (GUP) in order to investigate the scattering process. We mainly compute, at the low energy limit, the differential scattering and absorption cross section by using the partial wave method. We determine the phase shift analytically and verify that these quantities

    更新日期:2020-10-13
  • Massive photons and electrically charged black holes
    Phys. Lett. B (IF 4.384) Pub Date : 2020-10-02
    A.D. Dolgov; K.S. Gudkova

    The characteristic time of disappearance of electric field in massive electrodynamics during the capture of electric charge by black holes is calculated. It is shown that this time does not depend upon the photon mass. The electric field at large distances disappears with the speed of light.

    更新日期:2020-10-11
  • Light Z′ and dark matter from U(1)X gauge symmetry
    Phys. Lett. B (IF 4.384) Pub Date : 2020-10-06
    Nobuchika Okada; Satomi Okada; Qaisar Shafi

    We consider a U(1)X gauge symmetry extension of the Standard Model (SM) with a Z′-portal Majorana fermion dark matter that allows for a relatively light gauge boson Z′ with mass of 10 MeV− a few GeV and a much heavier dark matter through the freeze-in mechanism. In a second scenario the roles are reversed, and the dark matter mass, in the keV range or so, lies well below the Z′ mass, say, ∼1 GeV. We

    更新日期:2020-10-11
  • A consistent theory of D → 4 Einstein-Gauss-Bonnet gravity
    Phys. Lett. B (IF 4.384) Pub Date : 2020-10-05
    Katsuki Aoki; Mohammad Ali Gorji; Shinji Mukohyama

    We investigate the D→4 limit of the D-dimensional Einstein-Gauss-Bonnet gravity, where the limit is taken with α˜=(D−4)α kept fixed and α is the original Gauss-Bonnet coupling. Using the ADM decomposition in D dimensions, we clarify that the limit is rather subtle and ambiguous (if not ill-defined) and depends on the way how to regularize the Hamiltonian or/and the equations of motion. To find a consistent

    更新日期:2020-10-11
  • Black holes with Skyrmion-anti-Skyrmion hairs
    Phys. Lett. B (IF 4.384) Pub Date : 2020-10-06
    Yakov Shnir

    New static axially symmetric black holes in multi-Skyrmion configurations coupled to Einstein gravity are constructed in four dimensional asymptotically flat space-time. In a simplest case the event horizon is located in-between a Skyrmion-anti-Skyrmion pair, other solutions represent black holes with gravitationally bounded chains of Skyrmions and anti-Skyrmions placed along the axis of symmetry in

    更新日期:2020-10-11
  • Jet momentum broadening in the pre-equilibrium Glasma
    Phys. Lett. B (IF 4.384) Pub Date : 2020-09-25
    A. Ipp; D.I. Müller; D. Schuh

    Jets are important probes of heavy ion collisions as they can provide information on the interaction of a highly energetic parton with the medium it traverses. In the hydrodynamic stage of dense, strongly interacting matter, these interactions can be explained in terms of scattering processes, soft gluon emission and collinear parton splittings. However, jets originate even before the hydrodynamic

    更新日期:2020-10-11
  • Final state of instabilities in Born-Infeld black holes
    Phys. Lett. B (IF 4.384) Pub Date : 2020-10-05
    A. Rahmani; M. Honardoost; H.R. Sepangi

    We study two types of linear instabilities in Einstein-Born-Infeld-scalar field theory and show that small Born-Infeld (BI) black holes suffer from superradiant instability within a particular range of frequencies; the larger the BI coupling parameter, the slower the growth rate of the instability. It is predicted that a small BI black hole decays into a small hairy black hole that has a charged scalar

    更新日期:2020-10-08
  • Anomalous U(1) gauge bosons as light dark matter in string theory
    Phys. Lett. B (IF 4.384) Pub Date : 2020-10-02
    Luis A. Anchordoqui; Ignatios Antoniadis; Karim Benakli; Dieter Lüst

    Present experiments are sensitive to very weakly coupled extra gauge symmetries which motivates further investigation of their appearance in string theory compactifications and subsequent properties. We consider extensions of the standard model based on open strings ending on D-branes, with gauge bosons due to strings attached to stacks of D-branes and chiral matter due to strings stretching between

    更新日期:2020-10-08
  • Gauge fields and quantum entanglement
    Phys. Lett. B (IF 4.384) Pub Date : 2020-09-25
    Jakub Mielczarek; Tomasz Trześniewski

    The purpose of this letter is to explore the relation between gauge fields, which are at the base of our understanding of fundamental interactions, and the quantum entanglement. To this end, we investigate the case of SU(2) gauge fields. It is first argued that holonomies of the SU(2) gauge fields are naturally associated with maximally entangled two-particle states. Then, we provide some evidence

    更新日期:2020-10-08
  • Search for a common baryon source in high-multiplicity pp collisions at the LHC
    Phys. Lett. B (IF 4.384) Pub Date : 2020-10-08

    We report on the measurement of the size of the particle-emitting source from two-baryon correlations with ALICE in high-multiplicity pp collisions at s=13 TeV. The source radius is studied with low relative momentum p–p, p‾–p‾, p–Λ , and p‾–Λ‾ pairs as a function of the pair transverse mass mT considering for the first time in a quantitative way the effect of strong resonance decays. After correcting

    更新日期:2020-10-08
  • Rapidly rotating Δ-resonance-admixed hypernuclear compact stars
    Phys. Lett. B (IF 4.384) Pub Date : 2020-09-30
    Jia Jie Li; Armen Sedrakian; Fridolin Weber

    We use a set of hadronic equations of state derived from covariant density functional theory to study the impact of their high-density behavior on the properties of rapidly rotating Δ-resonance-admixed hyperonic compact stars. In particular, we explore systematically the effects of variations of the bulk energy isoscalar skewness, Qsat, and the symmetry energy slope, Lsym, on the masses of rapidly

    更新日期:2020-10-07
  • Reloading the axion in a 3-3-1 setup
    Phys. Lett. B (IF 4.384) Pub Date : 2020-10-01
    Alex G. Dias; Julio Leite; José W.F. Valle; Carlos A. Vaquera-Araujo

    We generalize the idea of the axion to an extended electroweak gauge symmetry setup. We propose a minimal axion extension of the Singer-Valle-Schechter (SVS) theory, in which the standard model fits in SU(3)L⊗U(1)X, the number of families results from anomaly cancellation, and the Peccei-Quinn (PQ) solution to the strong-CP problem is implemented. Neutrino masses arise from a type-I Dirac seesaw mechanism

    更新日期:2020-10-07
  • Feebly interacting U(1)B−L gauge boson warm dark matter and XENON1T anomaly
    Phys. Lett. B (IF 4.384) Pub Date : 2020-10-02
    Gongjun Choi; Tsutomu T. Yanagida; Norimi Yokozaki

    The recent observation of an excess in the electronic recoil data by the XENON1T detector has drawn many attentions as a potential hint for an extension of the Standard Model (SM). Absorption of a vector boson with the mass of mA′∈(2keV,3keV) is one of the feasible explanations to the excess. In the case where the vector boson explains the dark matter (DM) population today, it is highly probable that

    更新日期:2020-10-07
  • Through the looking-glass with ALICE into the quark-gluon plasma: A new test for hadronic interaction models used in air shower simulations
    Phys. Lett. B (IF 4.384) Pub Date : 2020-10-02
    Luis A. Anchordoqui; Carlos García Canal; Sergio J. Sciutto; Jorge F. Soriano

    Recently, the ALICE Collaboration reported an enhancement of the yield ratio of strange and multi-strange hadrons to charged pions as a function of multiplicity at mid-rapidity in proton-proton, proton-lead, lead-lead, and xenon-xenon scattering. ALICE observations provide a strong indication that a quark-gluon plasma is partly formed in high multiplicity events of both small and large colliding systems

    更新日期:2020-10-07
  • Note on de Sitter vacua from perturbative and non-perturbative dynamics in type IIB/F-theory compactifications
    Phys. Lett. B (IF 4.384) Pub Date : 2020-10-01
    Vasileios Basiouris; George K. Leontaris

    The properties of the effective scalar potential are studied in the framework of type IIB string theory, taking into account perturbative and non-perturbative corrections. The former modify the Kähler potential and include α′ and logarithmic corrections generated when intersecting D7 branes are part of the internal geometric configuration. The latter add exponentially suppressed Kähler moduli dependent

    更新日期:2020-10-07
  • 5-dimensional Chern-Simons gauge theory on an interval: Massive spin-2 theory from symmetry breaking via boundary conditions
    Phys. Lett. B (IF 4.384) Pub Date : 2020-10-05
    Mahdi Torabian

    In this note, we revisit the 4-dimensional theory of massive gravity through compactification of an extra dimension and geometric symmetry breaking. We dimensionally reduce the 5-dimensional topological Chern-Simons gauge theory of (anti) de Sitter group on an interval. We apply non-trivial boundary conditions at the endpoints to break all of the gauge symmetries. We identify different components of

    更新日期:2020-10-07
  • Nonlinear electrodynamics with the maximum allowable symmetries
    Phys. Lett. B (IF 4.384) Pub Date : 2020-10-05
    B.P. Kosyakov

    Recently Bandos, Lechner, Sorokin, and Townsend have discovered that Maxwell's electrodynamics can be generalized so that the resulting nonlinear theory preserves both conformal invariance and SO(2) duality-rotation invariance. Their result can be derived in a simpler way.

    更新日期:2020-10-07
  • Chirp effects on pair production in oscillating electric fields with spatial inhomogeneity
    Phys. Lett. B (IF 4.384) Pub Date : 2020-09-29
    Mamutjan Ababekri; Sayipjamal Dulat; B.S. Xie; Jun Zhang

    Chirp effects on the vacuum pair creation are studied with space and time dependent electric field models. For rapidly oscillating electric fields, the total particle number enhancement only occurs for larger chirp values and the very large chirp may render the effect from the finite spatial size trivial. For slowly oscillating electric fields, the chirp and carrier phase parameters have crucial effects

    更新日期:2020-10-06
  • A domain wall description of brane inflation and observational aspects
    Phys. Lett. B (IF 4.384) Pub Date : 2020-09-29
    R.M.P. Neves; F.F. Santos; F.A. Brito

    We consider a brane cosmology scenario by taking an inflating 3D domain wall immersed in a five-dimensional Minkowski space in the presence of a stack of N parallel domain walls. They are static BPS solutions of the bosonic sector of a 5D supergravity theory. However, one can move towards each other due to an attractive force in between driven by bulk particle collisions and resonant tunneling effect

    更新日期:2020-10-06
  • Production of f2(1270) meson in pp collisions at the LHC via gluon-gluon fusion in the kt-factorization approach
    Phys. Lett. B (IF 4.384) Pub Date : 2020-09-29
    Piotr Lebiedowicz; Antoni Szczurek

    We calculate inclusive cross section for f2(1270) tensor meson production via color singlet gluon-gluon fusion in the kt-factorization approach with unintegrated gluon distribution functions (UGDFs). The process may be potentially interesting in the context of searches for saturation effects. The energy-momentum tensor, equivalent to helicity-2 coupling, and helicity-0 coupling are used for the g⁎g⁎→f2(1270)

    更新日期:2020-10-05
  • Core meets corona: A two-component source to explain Λ and Λ‾ global polarization in semi-central heavy-ion collisions
    Phys. Lett. B (IF 4.384) Pub Date : 2020-09-29
    Alejandro Ayala; Marco Alberto Ayala Torres; Eleazar Cuautle; Isabel Domínguez; Marcos Aurelio Fontaine Sanchez; Ivonne Maldonado; E. Moreno-Barbosa; P.A. Nieto-Marín; Mario Rodríguez-Cahuantzi; Jordi Salinas; María Elena Tejeda-Yeomans; L. Valenzuela-Cázares

    We compute the Λ and Λ‾ global polarization in semi-central heavy-ion collisions modeling the source as consisting of a high-density core and a less dense corona. We show that when more Λs than Λ‾s are produced in the corona, and this is combined with a smaller number of Λs coming from the core, as compared to those coming from the corona, an amplification effect for the Λ‾ with respect to that of

    更新日期:2020-10-05
  • Heavy neutral leptons from kaon decays in the SHiP experiment
    Phys. Lett. B (IF 4.384) Pub Date : 2020-09-30
    Dmitry Gorbunov; Igor Krasnov; Yury Kudenko; Sergey Suvorov

    We calculate the signal rate of hypothetical heavy neutral leptons (HNL or sterile neutrinos) from kaon decays expected in the framework of the SHiP experiment. The kaons are produced in the hadronic shower initiated in the beam-dump mode by 400 GeV protons from CERN SPS. For a sufficiently light HNL (when the decays are kinematically allowed) we find kaon decays to be a noticeably richer source of

    更新日期:2020-10-05
  • Considerations on gravitational waves in higher-order local and non-local gravity
    Phys. Lett. B (IF 4.384) Pub Date : 2020-09-29
    S. Capozziello; M. Capriolo; S. Nojiri

    The detection of gravitational wave modes and polarizations could constitute an extremely important signature to discriminate among different theories of gravity. According to this statement, it is possible to prove that higher-order non-local gravity has formally the same gravitational spectrum of higher-order local gravity. In particular, we consider the cases of f(R,□R,□2R,⋯,□nR)=R+∑i=1nαiR□iR gravity

    更新日期:2020-10-05
  • Abelian Fock - Schwinger representation for the quark propagator in external gauge field
    Phys. Lett. B (IF 4.384) Pub Date : 2020-09-28
    M.A. Zubkov

    We develop the Diakonov - Petrov approach to the representation of the non - Abelian Wilson loop in an Abelian form. First of all, we extend this approach to the Abelian representation of the parallel transporter corresponding to the open curve rather than to the closed contour. Next, we extend this representation to the case of the non - compact groups. The obtained expressions allow us to derive

    更新日期:2020-10-05
  • Constraining isovector nuclear interactions with giant resonances within a Bayesian approach
    Phys. Lett. B (IF 4.384) Pub Date : 2020-09-29
    Jun Xu; Jia Zhou; Zhen Zhang; Wen-Jie Xie; Bao-An Li

    We put a stringent constraint on the isovector nuclear interactions in the Skyrme-Hartree-Fock model from the centroid energy E−1 of the isovector giant dipole resonance in 208Pb as well as its electric polarizability αD. Using the Bayesian analysis method, E−1 and αD are found to be mostly determined by the nuclear symmetry energy Esym at about ρ⋆=0.05 fm−3 and the isovector nucleon effective mass

    更新日期:2020-10-05
  • Towards the determination of the dimension of the critical surface in asymptotically safe gravity
    Phys. Lett. B (IF 4.384) Pub Date : 2020-09-24
    Kevin Falls; Nobuyoshi Ohta; Roberto Percacci

    We compute the beta functions of Higher Derivative Gravity within the Functional Renormalization Group approach, going beyond previously studied approximations. We find that the presence of a nontrivial Newtonian coupling induces, in addition to the free fixed point of the one-loop approximation, also two nontrivial fixed points, of which one has the right signs to be free from tachyons. Our results

    更新日期:2020-10-05
  • Thermodynamics of FRW Universe: Heat engine
    Phys. Lett. B (IF 4.384) Pub Date : 2020-09-29
    Ujjal Debnath

    We assume the non-flat Friedmann-Robertson-Walker (FRW) Universe as a thermodynamical system. We assume the cosmological horizon as an inner trapping horizon which is treated as dynamical apparent horizon of FRW Universe. We write the dynamical apparent horizon radius and temperature on the apparent horizon. We assume that the fluid pressure as thermodynamical pressure of the system. Using Hayward's

    更新日期:2020-10-02
Contents have been reproduced by permission of the publishers.
导出
全部期刊列表>>
Springer 纳米技术权威期刊征稿
全球视野覆盖
施普林格·自然新
chemistry
3分钟学术视频演讲大赛
物理学研究前沿热点精选期刊推荐
自然职位线上招聘会
欢迎报名注册2020量子在线大会
化学领域亟待解决的问题
材料学研究精选新
GIANT
ACS ES&T Engineering
ACS ES&T Water
屿渡论文,编辑服务
ACS Publications填问卷
阿拉丁试剂right
麻省大学
西北大学
湖南大学
华东师范大学
王要兵
化学所
隐藏1h前已浏览文章
课题组网站
新版X-MOL期刊搜索和高级搜索功能介绍
ACS材料视界
天合科研
x-mol收录
陆军军医大学
杨财广
廖矿标
试剂库存
down
wechat
bug