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
  • A fundamental QCD axion model
    Phys. Lett. B (IF 4.384) Pub Date : 2020-08-10
    Alberto Salvio

    We construct and study a fundamental field theory of the QCD axion: all couplings flow to zero in the infinite-energy limit realizing the totally asymptotically free (TAF) scenario. Some observable quantities (such as the masses of new quarks and scalars) are predicted at low energies by the TAF requirement in terms of gauge couplings and a vector-boson mass. Here the minimal model of this sort is

    更新日期:2020-08-12
  • On entanglement entropy of Maxwell fields in 3+1 dimensions
    Phys. Lett. B (IF 4.384) Pub Date : 2020-08-03
    Candost Akkaya; Alex Kovner

    We consider entanglement entropy between two halves of space separated by a plane, in the theory of free photon in 3+1 dimensions. We show how to separate local gauge invariant quantities that belong to the two spatial regions. We calculate the entanglement entropy by integrating over the degrees of freedom in one half space using an approximation that assumes slow variation of the magnetic fields

    更新日期:2020-08-12
  • Higher-form symmetries and 3-group in axion electrodynamics
    Phys. Lett. B (IF 4.384) Pub Date : 2020-08-04
    Yoshimasa Hidaka; Muneto Nitta; Ryo Yokokura

    We study higher-form symmetries in a low-energy effective theory of a massless axion coupled with a photon in (3+1) dimensions. It is shown that the higher-form symmetries of this system are accompanied by a semistrict 3-group (2-crossed module) structure, which can be found by the correlation functions of symmetry generators of the higher-form symmetries. We argue that the Witten effect and anomalous

    更新日期:2020-08-12
  • Basis-dependent measures and analysis uncertainties in nuclear chaoticity
    Phys. Lett. B (IF 4.384) Pub Date : 2020-08-05
    Long-Jun Wang; Fang-Qi Chen; Yang Sun

    Chaoticity in nuclei is usually measured by the information entropy through analyzing wave functions, or by spectral statistics with the spectral rigidity and the nearest neighbor level spacing (NNLS) distribution. We show that although information entropy (or localization length) is a basis-dependent quantity, it is helpful for understanding the complexity of wave functions, especially when the corresponding

    更新日期:2020-08-12
  • Exceptional super Yang-Mills in 27 + 3 and worldvolume M-theory
    Phys. Lett. B (IF 4.384) Pub Date : 2020-08-12
    Michael Rios; Alessio Marrani; David Chester

    Bars and Sezgin have proposed a super Yang-Mills theory in D=s+t=11+3 space-time dimensions with an electric 3-brane that generalizes the 2-brane of M-theory. More recently, the authors found an infinite family of exceptional super Yang-Mills theories in D=(8n+3)+3 via the so-called Magic Star algebras. A particularly interesting case occurs in signature D=27+3, where the superalgebra is centrally

    更新日期:2020-08-12
  • Time-dependent generator coordinate method for many-particle tunneling
    Phys. Lett. B (IF 4.384) Pub Date : 2020-08-12
    N. Hasegawa; K. Hagino; Y. Tanimura

    It has been known that the time-dependent Hartree-Fock (TDHF) method, or the time-dependent density functional theory (TDDFT), fails to describe many-body quantum tunneling. We overcome this problem by superposing a few time-dependent Slater determinants with the time-dependent generator coordinate method (TDGCM). We apply this method to scattering of two α particles in one dimension, and demonstrate

    更新日期:2020-08-12
  • The Volume of Quasi-static Spherically Symmetric Charged Black Hole
    Phys. Lett. B (IF 4.384) Pub Date : 2020-08-12
    Jie Jiang; Shan-Zhong Han

    Black holes that have evaporated are often thought of as small objects due to their tiny exterior area. However, the horizon bounds large spacelike hypersurfaces. A compelling geometric perspective on the evolution of the interior geometry was recently shown to be provided by a generally covariant definition of the volume inside a black hole using maximal surfaces. The case of an evaporating black

    更新日期:2020-08-12
  • Inflation, higher spins and the swampland
    Phys. Lett. B (IF 4.384) Pub Date : 2020-08-07
    Marco Scalisi

    We study the implications on inflation of an infinite tower of higher-spin states with masses falling exponentially at large field distances, as dictated by the Swampland Distance Conjecture. We show that the Higuchi lower bound on the mass of the tower automatically translates into an upper bound on the inflaton excursion. Strikingly, the mere existence of all spins in the tower forbids any scalar

    更新日期:2020-08-11
  • Studying Coulomb correction at EIC and EicC
    Phys. Lett. B (IF 4.384) Pub Date : 2020-08-05
    Ze-hao Sun; Du-xin Zheng; Jian Zhou; Ya-jin Zhou

    We study the gauge link contribution to the dipole type transverse momentum dependent distributions of coherent photons, which is conventionally referred to as the Coulomb correction. We further propose to search for the evidence of the Coulomb correction in the Bethe-Heitler process in eA collisions at EIC and EicC.

    更新日期:2020-08-11
  • On the hydrodynamic description of holographic viscoelastic models
    Phys. Lett. B (IF 4.384) Pub Date : 2020-08-11
    Martin Ammon; Matteo Baggioli; Seán Gray; Sebastian Grieninger; Akash Jain

    We show that the correct dual hydrodynamic description of homogeneous holographic models with spontaneously broken translations must include the so-called “strain pressure” – a novel transport coefficient proposed recently. Taking this new ingredient into account, we investigate the near-equilibrium dynamics of a large class of holographic models and faithfully reproduce all the hydrodynamic modes

    更新日期:2020-08-11
  • Electromagnetic properties of 21O for benchmarking nuclear Hamiltonians
    Phys. Lett. B (IF 4.384) Pub Date : 2020-08-11
    S. Heil; M. Petri; K. Vobig; D. Bazin; J. Belarge; P. Bender; B.A. Brown; R. Elder; B. Elman; A. Gade; T. Haylett; J.D. Holt; T. Hüther; A. Hufnagel; H. Iwasaki; N. Kobayashi; C. Loelius; B. Longfellow; K. Whitmore

    The structure of exotic nuclei provides valuable tests for state-of-the-art nuclear theory. In particular electromagnetic transition rates are more sensitive to aspects of nuclear forces and many-body physics than excitation energies alone. We report the first lifetime measurement of excited states in 21O, finding τ1/2+=420−32+35(stat)−12+34(sys) ps. This result together with the deduced level scheme

    更新日期:2020-08-11
  • A topological model of composite preons from the minimal ideals of two Clifford algebras
    Phys. Lett. B (IF 4.384) Pub Date : 2020-08-11
    Niels G. Gresnigt

    This paper demonstrates a direct correspondence between a recent algebraic characterization of leptons and quarks as basis elements of the minimal one-sided ideals of the complex Clifford algebras Cℓ(6) and Cℓ(4), shown earlier to transform as a single generation of leptons and quarks under the Standard Model's unbroken SU(3)c×U(1)em and SU(2)L gauge symmetries respectively, and a topological formulation

    更新日期:2020-08-11
  • Chern-Simons theory with the exceptional gauge group as a refined topological string
    Phys. Lett. B (IF 4.384) Pub Date : 2020-08-11
    R.L. Mkrtchyan

    We present the partition function of Chern-Simons theory with the exceptional gauge group on three-sphere in the form of a partition function of the refined closed topological string with relation 2τ=gs(1−b) between single Kähler parameter τ, string coupling constant gs and refinement parameter b, where b=53,52,3,4,6 for G2,F4,E6,E7,E8, respectively. The non-zero BPS invariants NJL,JRd (d - degree)

    更新日期:2020-08-11
  • Supersmoothing through Slow Contraction
    Phys. Lett. B (IF 4.384) Pub Date : 2020-08-11
    William G. Cook; Iryna A. Glushchenko; Anna Ijjas; Frans Pretorius; Paul J. Steinhardt

    Performing a fully non-perturbative analysis using the tools of numerical general relativity, we demonstrate that a period of slow contraction is a “supersmoothing” cosmological phase that homogenizes, isotropizes and flattens the universe both classically and quantum mechanically and can do so far more robustly and rapidly than had been realized in earlier studies.

    更新日期:2020-08-11
  • An analytic treatment of quartic hilltop inflation
    Phys. Lett. B (IF 4.384) Pub Date : 2020-08-11
    Konstantinos Dimopoulos

    Quartic hilltop inflation remains one of the most successful inflationary models. Yet, the expectations of early treatments of hilltop inflation would contradict the observations and render the model excluded. However, recent numerical treatment has demonstrated that quartic hilltop inflation actually fares well with observations. In this work, a fully analytic treatment of the model aims to dispel

    更新日期:2020-08-11
  • Anomalous scattering and transport in chiral matter
    Phys. Lett. B (IF 4.384) Pub Date : 2020-08-06
    Kirill Tuchin

    Chiral anomaly modifies the scattering processes in chiral systems. These processes can be investigated using the Maxwell-Chern-Simons theory that couples electrodynamics to the pseudoscalar field θ describing the topological charge induced by external sources. Assuming slow variation of the topological charge density, the fermion scattering cross section is computed in the Born approximation and is

    更新日期:2020-08-10
  • Ghosts in higher derivative Maxwell-Chern-Simon's theory and PT-symmetry
    Phys. Lett. B (IF 4.384) Pub Date : 2020-08-03
    Biswajit Paul; Himangshu Dhar; Biswajit Saha

    Ghost fields in quantum field theory have been a long standing problem. Specifically, theories with higher derivatives involve ghosts that appear in the Hamiltonian in the form of linear momenta term, which is commonly known as the Ostrogradski ghost. Higher derivative theories may involve both types of constraints i.e. first class and second class. Interestingly, these higher derivative theories may

    更新日期:2020-08-10
  • Light nuclei production in Au + Au collisions at sNN = 7.7 - 80 GeV from UrQMD model
    Phys. Lett. B (IF 4.384) Pub Date : 2020-08-03
    Xian-Gai Deng; Yu-Gang Ma

    Light nuclei production in relativistic 197Au + 197Au collisions from 7.7 to 80 GeV is investigated within the Ultra-relativistic-Quantum-Molecular-Dynamics model (UrQMD) with a naive coalescence approach. The results of the production of light nuclei at midrapidity can essentially match up the experimental data and a slight enhancement of combined ratio of NpNt/Nd2 where Np,Nd and Nt represent respectively

    更新日期:2020-08-08
  • On the noncommutative Aharonov-Bohm effects
    Phys. Lett. B (IF 4.384) Pub Date : 2020-08-04
    Jian Jing; Ling-Bao Kong; Qing Wang; Shi-Hai Dong

    We revisit time-independent and time-dependent Aharonov-Bohm effects in the noncommutative space-time by investigating a relativistic spin-half particle in the background of a long-thin magnetic-flux-carried solenoid. Our results show that, up to the first order of the noncommutative parameter, there are no noncommutative corrections on the AB effects for both cases.

    更新日期:2020-08-08
  • Anomalous electromagnetic moments of τ lepton in γγ → τ+τ− reaction in Pb+Pb collisions at the LHC
    Phys. Lett. B (IF 4.384) Pub Date : 2020-08-07
    Mateusz Dyndał; Mariola Kłusek-Gawenda; Antoni Szczurek; Matthias Schott

    We discuss the sensitivity of the γγ→τ+τ− process in ultraperipheral Pb+Pb collisions on the anomalous magnetic (aτ) and electric (dτ) moments of τ lepton at LHC energies. We derive the corresponding cross sections by folding the elementary cross section with the heavy-ion photon fluxes and considering semi-leptonic decays of both τ leptons in the fiducial volume of ATLAS and CMS detectors. We present

    更新日期:2020-08-08
  • XENON1T signal from transition neutrino magnetic moments
    Phys. Lett. B (IF 4.384) Pub Date : 2020-08-07
    O.G. Miranda; D.K. Papoulias; M. Tórtola; J.W.F. Valle

    The recent puzzling results of the XENON1T collaboration at few keV electronic recoils could be due to the scattering of solar neutrinos endowed with finite Majorana transition magnetic moments (TMMs). Within such general formalism, we find that the observed excess in the XENON1T data agrees well with this interpretation. The required TMM strengths lie within the limits set by current experiments,

    更新日期:2020-08-08
  • On the formation of “supermassive” neutron stars and dynamical transition to spontaneous scalarization
    Phys. Lett. B (IF 4.384) Pub Date : 2020-07-30
    Juan Carlos Degollado; Marcelo Salgado; Miguel Alcubierre

    It is well known that neutron stars can undergo a phase transition under a certain class of Scalar Tensor Theories of gravity (STT's) where a new order parameter, the scalar charge, appears within the star. This is the well known phenomenon of spontaneous scalarization (SC) discovered by Damour and Esposito-Farèse in 1993. Under such mechanism neutron stars can afford in principle a maximum mass larger

    更新日期:2020-08-06
  • Beam-normal single spin asymmetry in elastic electron scattering off 28Si and 90Zr
    Phys. Lett. B (IF 4.384) Pub Date : 2020-07-30
    A. Esser; M. Thiel; P. Achenbach; K. Aulenbacher; S. Aulenbacher; S. Baunack; D. Bosnar; S. Caiazza; M. Christmann; M. Dehn; M.O. Distler; L. Doria; P. Eckert; M. Gorchtein; P. Gülker; P. Herrmann; M. Hoek; S. Kegel; C. Sfienti

    We report on a new measurement of the beam-normal single spin asymmetry An in the elastic scattering of 570 MeV transversely polarized electrons off 28Si and 90Zr at Q2=0.04 GeV2/c2. The studied kinematics allow for a comprehensive comparison with former results on 12C. No significant mass dependence of the beam-normal single spin asymmetry is observed in the mass regime from 12C to 90Zr.

    更新日期:2020-08-06
  • Nucleon quasi-parton distributions in the large Nc limit
    Phys. Lett. B (IF 4.384) Pub Date : 2020-07-30
    Hyeon-Dong Son; Asli Tandogan; Maxim V. Polyakov

    In this letter, we investigate the nucleon quasi-parton distribution functions in the chiral quark soliton model. We derive a set of sum-rules depending on the velocity of the nucleon and on the Dirac matrix defining the distribution functions. We present numerical results for the isosinglet unpolarized distribution, in which we find that the anti-quark distribution breaks the positivity condition

    更新日期:2020-08-06
  • Thermodynamics and P-v criticality of Bardeen-AdS black hole in 4D Einstein-Gauss-Bonnet gravity
    Phys. Lett. B (IF 4.384) Pub Date : 2020-07-29
    Dharm Veer Singh; Sanjay Siwach

    We consider the Gauss-Bonnet corrected Bardeen black hole solution in 4D AdS space-time. The solution is obtained by the limiting procedure adopted by Glavan and Lin in 4D Einstein-Gauss-Bonnet gravity. The general form of first law of black hole thermodynamics is utilized to calculate various thermodynamics variables. The solution exhibits P-v criticality and belongs to the universality class of van-der

    更新日期:2020-08-06
  • Bootstrap bound on extremal Reissner-Nordström black hole in AdS
    Phys. Lett. B (IF 4.384) Pub Date : 2020-08-05
    Yu Nakayama

    Based on the numerical conformal bootstrap bound, we show that the arbitrarily small Reissner-Nordström black hole in AdS space-time is inconsistent with holography unless the energy spectrum is modified quantum mechanically or it is unstable as indicated by the weak gravity conjecture.

    更新日期:2020-08-06
  • ..., 83106786, 114382724, 1509048322, 2343463290, 27410087742, ... efficient Hilbert series for effective theories
    Phys. Lett. B (IF 4.384) Pub Date : 2020-07-22
    Coenraad B. Marinissen; Rudi Rahn; Wouter J. Waalewijn

    We present an efficient algorithm for determining the Hilbert series of an effective theory, which counts the number of operators with a specific field content, and provide a companion code called Eco (Efficient Counting of Operators) in Form. For example, the Hilbert series for the dimension 15 operators in the Standard Model Effective Theory (SMEFT) can be obtained in a minute on a single CPU core

    更新日期:2020-08-05
  • Bounds on the non-standard W+W−γ couplings at the LHeC and the FCC-he
    Phys. Lett. B (IF 4.384) Pub Date : 2020-07-30
    M. Köksal; A.A. Billur; A. Gutiérrez-Rodríguez; M.A. Hernández-Ruíz

    We examine the potential of the e−p→e−γ⁎p→e−W−q′X (γ⁎ is the Weizsacker-Williams photon) reaction to probe the non-standard W+W−γ couplings at the Large Hadron electron Collider (LHeC) and the Future Circular Collider-hadron electron (FCC-he). Using the effective Lagrangian approach with various values of the center-of-mass energy and integrated luminosity, we find 95% confidence level bounds on the

    更新日期:2020-08-05
  • Lower-dimensional Gauss–Bonnet gravity and BTZ black holes
    Phys. Lett. B (IF 4.384) Pub Date : 2020-07-29
    Robie A. Hennigar; David Kubizňák; Robert B. Mann; Christopher Pollack

    We consider the D→3 limit of Gauss–Bonnet gravity. We find two distinct but similar versions of the theory and obtain black hole solutions for each. For one theory the solution is an interesting generalization of the BTZ black hole that does not have constant curvature but whose thermodynamics is identical. The other theory admits a solution that is asymptotically AdS but does not approach the BTZ

    更新日期:2020-08-05
  • Resonant superalgebras and N=1 supergravity theories in three spacetime dimensions
    Phys. Lett. B (IF 4.384) Pub Date : 2020-07-29
    Patrick Concha; Remigiusz Durka; Evelyn Rodríguez

    We explore N=1 supersymmetric extensions of algebras going beyond the Poincaré and AdS ones in three spacetime dimensions. Besides reproducing two known examples, we present new superalgebras, which all correspond to supersymmetric extensions with one fermionic charge Qα concerning the so-called resonant algebras being characterized by the presence of an additional bosonic generator Za. We point out

    更新日期:2020-08-05
  • Family of chiral two- plus three-nucleon interactions for accurate nuclear structure studies
    Phys. Lett. B (IF 4.384) Pub Date : 2020-07-27
    Thomas Hüther; Klaus Vobig; Kai Hebeler; Ruprecht Machleidt; Robert Roth

    We present a family of nucleon-nucleon (NN) plus three-nucleon (3N) interactions up to N3LO in the chiral expansion that provides an accurate ab initio description of ground-state energies and charge radii up to the medium-mass regime with quantified theory uncertainties. Starting from the NN interactions proposed by Entem, Machleidt and Nosyk, we construct 3N interactions with consistent chiral order

    更新日期:2020-08-05
  • Continuum and three-nucleon force in Borromean system: The 17Ne case
    Phys. Lett. B (IF 4.384) Pub Date : 2020-08-03
    Y.Z. Ma; F.R. Xu; N. Michel; S. Zhang; J.G. Li; B.S. Hu; L. Coraggio; N. Itaco; A. Gargano

    Starting from chiral two-nucleon (2NF) and chiral three-nucleon (3NF) potentials, we present a detailed study of 17Ne, a Borromean system, with the Gamow shell model which can capture continuum effects. More precisely, we take advantage of the normal-ordering approach to include the 3NF and the Berggren representation to treat bound, resonant and continuum states on equal footing in a complex-momentum

    更新日期:2020-08-05
  • Physics-inspired deep learning to characterize the signal manifold of quasi-circular, spinning, non-precessing binary black hole mergers
    Phys. Lett. B (IF 4.384) Pub Date : 2020-07-27
    Asad Khan; E.A. Huerta; Arnav Das

    The spin distribution of binary black hole mergers contains key information concerning the formation channels of these objects, and the astrophysical environments where they form, evolve and coalesce. To quantify the suitability of deep learning to estimate the individual spins, effective spin and mass-ratio of quasi-circular, spinning, non-precessing binary black hole mergers, we introduce a modified

    更新日期:2020-08-04
  • Beam–target helicity asymmetry E in K+Σ− photoproduction on the neutron
    Phys. Lett. B (IF 4.384) Pub Date : 2020-07-30

    We report a measurement of a beam–target double-polarisation observable (E) for the γ→n→(p)→K+Σ−(p) reaction. The data were obtained impinging the circularly-polarised energy-tagged photon beam of Hall B at Jefferson Lab on a longitudinally-polarised frozen-spin hydrogen deuteride (HD) nuclear target. The E observable for an effective neutron target was determined for centre-of-mass energies 1.70≤W≤2

    更新日期:2020-08-04
  • Precise prediction for the mass of the light MSSM Higgs boson for the case of a heavy gluino
    Phys. Lett. B (IF 4.384) Pub Date : 2020-07-30
    Henning Bahl; Ivan Sobolev; Georg Weiglein

    State-of-the-art predictions for the mass of the lightest MSSM Higgs boson usually involve the resummation of higher-order logarithmic contributions obtained within an effective-field-theory (EFT) approach, often combined with a fixed-order calculation into a hybrid result. For the phenomenologically interesting case of a significant hierarchy between the gluino mass and the masses of the scalar top

    更新日期:2020-08-04
  • Connecting spatial moments and momentum densities
    Phys. Lett. B (IF 4.384) Pub Date : 2020-08-03
    M. Hoballah; M.B. Barbaro; R. Kunne; M. Lassaut; D. Marchand; G. Quéméner; E. Voutier; J. van de Wiele

    The precision of experimental data and analysis techniques is a key feature of any discovery attempt. A striking example is the proton radius puzzle where the accuracy of the spectroscopy of muonic atoms challenges traditional electron scattering measurements. The present work proposes a novel method for the determination of spatial moments from densities expressed in the momentum space. This method

    更新日期:2020-08-04
  • Results on total and elastic cross sections in proton–proton collisions at s=200 GeV
    Phys. Lett. B (IF 4.384) Pub Date : 2020-07-31

    We report results on the total and elastic cross sections in proton-proton collisions at s=200 GeV obtained with the Roman Pot setup of the STAR experiment at the Relativistic Heavy Ion Collider (RHIC). The elastic differential cross section was measured in the squared four-momentum transfer range 0.045≤−t≤0.135 GeV2. The value of the exponential slope parameter B of the elastic differential cross

    更新日期:2020-07-31
  • Boltzmann's H-theorem, entropy and the strength of gravity in theories with a nonminimal coupling between matter and geometry
    Phys. Lett. B (IF 4.384) Pub Date : 2020-07-23
    P.P. Avelino; R.P.L. Azevedo

    In this paper we demonstrate that Boltzmann's H-theorem does not necessarily hold in the context of theories of gravity with nonminimally coupled matter fields. We find sufficient conditions for the violation of Boltzmann's H-theorem and derive an expression for the evolution of Boltzmann's H in terms of the nonminimal coupling function, valid in the case of a collisionless gas in a homogeneous and

    更新日期:2020-07-29
  • Theoretical constraints on the Higgs potential of the general 331 model
    Phys. Lett. B (IF 4.384) Pub Date : 2020-07-22
    Antonio Costantini; Margherita Ghezzi; Giovanni Marco Pruna

    This article reviews the theoretical constraints on the scalar potential of a general extension of the Standard Model that encompasses a SU(3)c×SU(3)L×U(1)X gauge symmetry. In this respect, the boundedness-from-below is analysed to identify the correct criteria for obtaining the physical minima of the Higgs parameter space. Furthermore, perturbativity and unitarity bounds are discussed in light of

    更新日期:2020-07-29
  • Kaonic hydrogen and deuterium in Hamiltonian effective field theory
    Phys. Lett. B (IF 4.384) Pub Date : 2020-07-27
    Zhan-Wei Liu; Jia-Jun Wu; Derek B. Leinweber; Anthony W. Thomas

    The anti-kaon nucleon scattering lengths resulting from a Hamiltonian effective field theory analysis of experimental data and lattice QCD studies are presented. The same Hamiltonian is then used to compute the scattering length for the K−d system, taking careful account of the effects of recoil on the energy at which the K¯N T-matrices are evaluated. These results are then used to estimate the shift

    更新日期:2020-07-29
  • Can we observe jet PT-broadening in heavy-ion collisions at the LHC?
    Phys. Lett. B (IF 4.384) Pub Date : 2020-07-21
    Felix Ringer; Bo-Wen Xiao; Feng Yuan

    We investigate the effect of PT-broadening on jet substructure observables in heavy-ion collisions at the LHC. As an example, we focus on the opening angle of the two branches that satisfy the soft drop grooming condition in a highly energetic jet. The medium modification of the angular distribution can provide important information on the jet transport properties of hot QCD matter. In addition, we

    更新日期:2020-07-29
  • Perspectives of differential expansion
    Phys. Lett. B (IF 4.384) Pub Date : 2020-07-27
    L. Bishler; A. Morozov

    We outline the current status of the differential expansion (DE) of colored knot polynomials i.e. of their Z–F decomposition into representation– and knot–dependent parts. Its existence is a theorem for HOMFLY-PT polynomials in symmetric and antisymmetric representations, but everything beyond is still hypothetical – and quite difficult to explore and interpret. However, DE remains one of the main

    更新日期:2020-07-29
  • The area of a rough black hole
    Phys. Lett. B (IF 4.384) Pub Date : 2020-07-24
    John D. Barrow

    We investigate the consequences for the black hole area of introducing fractal structure for the horizon geometry. We create a three-dimensional spherical analogue of a ‘Koch Snowflake’ using a infinite diminishing hierarchy of touching spheres around the Schwarzschild event horizon. We can create a fractal structure for the horizon with finite volume and infinite (or finite) area. This is a toy model

    更新日期:2020-07-28
  • Three beta-decaying states in 128In and 130In resolved for the first time using Penning-trap techniques
    Phys. Lett. B (IF 4.384) Pub Date : 2020-07-24
    D.A. Nesterenko; A. Kankainen; J. Kostensalo; C.R. Nobs; A.M. Bruce; O. Beliuskina; L. Canete; T. Eronen; E.R. Gamba; S. Geldhof; R. de Groote; A. Jokinen; J. Kurpeta; I.D. Moore; L. Morrison; Zs. Podolyák; I. Pohjalainen; S. Rinta-Antila; J. Äystö

    Isomeric states in 128In and 130In have been studied with the JYFLTRAP Penning trap at the IGISOL facility. By employing state-of-the-art ion manipulation techniques, three different beta-decaying states in 128In and 130In have been separated and their masses measured. JYFLTRAP was also used to select the ions of interest for identification at a post-trap decay spectroscopy station. A new beta-decaying

    更新日期:2020-07-28
  • In-beam γ-ray spectroscopy at the proton dripline: 40Sc
    Phys. Lett. B (IF 4.384) Pub Date : 2020-07-22
    A. Gade; D. Weisshaar; B.A. Brown; J.A. Tostevin; D. Bazin; K. Brown; R.J. Charity; P.J. Farris; A.M. Hill; J. Li; B. Longfellow; W. Reviol; D. Rhodes

    We report on the first in-beam γ-ray spectroscopy of the proton-dripline nucleus 40Sc using two-nucleon pickup onto an intermediate-energy rare-isotope beam of 38Ca. The 9Be(38Ca,40Sc+γ)X reaction at 60.9 MeV/nucleon mid-target energy selectively populates states in 40Sc for which the transferred proton and neutron couple to high orbital angular momentum. In turn, due to angular-momentum selection

    更新日期:2020-07-27
  • Extraction of ND scattering lengths from the Λb → π−pD0 decay and properties of the Σc(2800)+
    Phys. Lett. B (IF 4.384) Pub Date : 2020-07-21
    Shuntaro Sakai; Feng-Kun Guo; Bastian Kubis

    The isovector and isoscalar ND s-wave scattering lengths are extracted by fitting to the LHCb data of the pD0 invariant-mass distribution in the decay Λb→π−pD0, making use of the cusp effect at the nD+ threshold. The analysis is based on a coupled-channel nonrelativistic effective field theory. We find that the real part of the isovector ND scattering length is unnaturally large due to the existence

    更新日期:2020-07-27
  • Isospin mass differences of singly heavy baryons
    Phys. Lett. B (IF 4.384) Pub Date : 2020-07-21
    Ghil-Seok Yang; Hyun-Chul Kim

    We study the isospin mass differences of singly heavy baryons, based on a pion mean-field approach. We consider both the electromagnetic interactions and the hadronic contributions that arise from the mass difference of the up and down quarks. The relevant parameters have been already fixed by the baryon octet. In addition, we introduce the strong hyperfine interactions between the light quarks inside

    更新日期:2020-07-27
  • Dark photons from pions produced in ultraperipheral PbPb collisions
    Phys. Lett. B (IF 4.384) Pub Date : 2020-07-21
    V.P. Gonçalves; B.D. Moreira

    In this letter we propose the search of dark photons in the decay of pions produced by γγ interactions in ultraperipheral PbPb collisions. The cross section is estimated considering an accurate treatment for the absorptive corrections and for the nuclear form factor. Predictions for the event rates are presented considering the expected luminosities for the LHC, High – Luminosity LHC and High – Energy

    更新日期:2020-07-27
  • Constraints on charm-anticharm asymmetry in the nucleon from lattice QCD
    Phys. Lett. B (IF 4.384) Pub Date : 2020-07-21
    Raza Sabbir Sufian; Tianbo Liu; Andrei Alexandru; Stanley J. Brodsky; Guy F. de Téramond; Hans Günter Dosch; Terrence Draper; Keh-Fei Liu; Yi-Bo Yang

    We present the first lattice QCD calculation of the charm quark contribution to the nucleon electromagnetic form factors GE,Mc(Q2) in the momentum transfer range 0≤Q2≤1.4 GeV2. The quark mass dependence, finite lattice spacing and volume corrections are taken into account simultaneously based on the calculation on three gauge ensembles including one at the physical pion mass. The nonzero value of the

    更新日期:2020-07-27
  • A new approach to search for free neutron-antineutron oscillations using coherent neutron propagation in gas
    Phys. Lett. B (IF 4.384) Pub Date : 2020-07-22
    V. Gudkov; V.V. Nesvizhevsky; K.V. Protasov; W.M. Snow; A.Yu. Voronin

    Coherent forward neutron propagation in gas is discussed as a new approach to search for neutron-antineutron oscillations (n−n¯), which violate both B and B−L conservation. We show that one can increase the probability of neutron - antineutron transitions in the presence of a nonzero external magnetic field to essentially free neutron oscillation probability by tuning the density of an appropriate

    更新日期:2020-07-27
  • Are non-vacuum states much relevant for retrieving shock wave memory of spacetime?
    Phys. Lett. B (IF 4.384) Pub Date : 2020-07-21
    Bibhas Ranjan Majhi

    Shock wave gives back reaction to spacetime and the information is stored in the memory of background. Quantum memory effect of localised shock wave on Minkowski metric is investigated here. We find that the Wightman function for massless scalar field, on both sides of the wave location, turns out to be the same for usual Minkowski spacetime. Therefore the observables obtained from this, for any kind

    更新日期:2020-07-27
  • Zeptosecond contact times for element Z=120 synthesis
    Phys. Lett. B (IF 4.384) Pub Date : 2020-07-17
    H.M. Albers; J. Khuyagbaatar; D.J. Hinde; I.P. Carter; K.J. Cook; M. Dasgupta; Ch.E. Düllmann; K. Eberhardt; D.Y. Jeung; S. Kalkal; B. Kindler; N.R. Lobanov; B. Lommel; C. Mokry; E. Prasad; D.C. Rafferty; J. Runke; K. Sekizawa; A. Yakushev

    The synthesis of new superheavy elements beyond oganesson (Z=118) requires fusion reactions with projectile nuclei with proton numbers larger than that of 48Ca (Z=20), which has been successfully employed for the synthesis of elements with Z=112-118. In such reactions, fusion is drastically hindered by fast non-equilibrated dynamical processes. Attempts to produce nuclei with Z=120 using the 64Ni+238U

    更新日期:2020-07-24
  • Physical resurgent extrapolation
    Phys. Lett. B (IF 4.384) Pub Date : 2020-07-17
    Ovidiu Costin; Gerald V. Dunne

    Expansions of physical functions are controlled by their singularities, which have special structure because they themselves are physical, corresponding to instantons, caustics or saddle configurations. Resurgent asymptotics formalizes this idea mathematically, and leads to significantly more powerful extrapolation methods to extract physical information from a finite number of terms of an expansion

    更新日期:2020-07-24
  • Exact overlaps in the Lieb-Liniger model from coordinate Bethe ansatz
    Phys. Lett. B (IF 4.384) Pub Date : 2020-07-20
    Hui-Huang Chen

    In the paper [1], the authors developed a new method to compute the exact overlap formulas between integrable boundary states and on-shell Bethe states in integrable spin chains. This method utilizes the coordinate Bethe ansatz representation of wave functions and singularity property of the off-shell overlaps. In this paper, we use this new method to derive the formula for overlaps between the Lieb-Liniger

    更新日期:2020-07-24
  • A Goldilocks Higgs
    Phys. Lett. B (IF 4.384) Pub Date : 2020-07-14
    Nemanja Kaloper; Alexander Westphal

    The Higgs may couple to a topological 4-form sector which yields a complex vacuum structure. In many of the resulting Higgs vacua electroweak symmetry is unbroken. In just as many it breaks when the 4-form flux is large enough. For a fixed value of flux, the symmetry breaking vacua have a smaller vacuum energy than the symmetric ones, where the difference is quantized because it is set by the 4-form

    更新日期:2020-07-24
  • Microstate renormalization in deformed D1-D5 SCFT
    Phys. Lett. B (IF 4.384) Pub Date : 2020-07-18
    A.A. Lima; G.M. Sotkov; M. Stanishkov

    We derive the corrections to the conformal dimensions of twisted Ramond ground states in the deformed two-dimensional N=(4,4) superconformal (T4)N/SN orbifold theory describing bound states of the D1-D5 brane system in type IIB superstring theory. Our result holds to second order in the deformation parameter, and at the large N planar limit. The method of calculation involves the analytic evaluation

    更新日期:2020-07-24
  • The continuum spectrum of hypernuclear trios
    Phys. Lett. B (IF 4.384) Pub Date : 2020-07-10
    M. Schäfer; B. Bazak; N. Barnea; J. Mareš

    The spectrum of hypernuclear trios composed of a Λ baryon and two nucleons is the subject of an ongoing experimental campaign, aiming to study the interaction of the Λ particle with a neutron, and the 3-body Λ-nucleon-nucleon force. In this manuscript we utilize baryonic effective field theory at leading order, constrained to reproduce the available low energy light hypernuclear data, to study the

    更新日期:2020-07-23
  • X-ray and gamma-ray limits on the primordial black hole abundance from Hawking radiation
    Phys. Lett. B (IF 4.384) Pub Date : 2020-07-16
    Guillermo Ballesteros; Javier Coronado-Blázquez; Daniele Gaggero

    The non-observation of extragalactic Hawking radiation from primordial black holes of 1016 g sets a conservative strong bound on their cosmological abundance. We revisit this bound and show how it can be improved (both in mass reach and strength) by an adequate modeling of the combined AGN and blazar emission in the MeV range. We also estimate the sensitivity to the primordial black hole abundance

    更新日期:2020-07-21
  • Measurement of CKM matrix elements in single top quark t-channel production in proton-proton collisions at s=13 TeV
    Phys. Lett. B (IF 4.384) Pub Date : 2020-07-08

    The first direct, model-independent measurement is presented of the modulus of the Cabibbo–Kobayashi–Maskawa (CKM) matrix elements |η|Vtb, |η|Vtd, and |η|Vts, in final states enriched in single top quark t-channel events. The analysis uses proton-proton collision data from the LHC, collected during 2016 by the CMS experiment, at a centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity

    更新日期:2020-07-21
  • Gluon pseudo-distributions at short distances: Forward case
    Phys. Lett. B (IF 4.384) Pub Date : 2020-07-15
    Ian Balitsky; Wayne Morris; Anatoly Radyushkin

    We present the results that are necessary in the ongoing lattice calculations of the gluon parton distribution functions (PDFs) within the pseudo-PDF approach. We give a classification of possible two-gluon correlator functions and identify those that contain the invariant amplitude determining the gluon PDF in the light-cone z2→0 limit. One-loop calculations have been performed in the coordinate representation

    更新日期:2020-07-20
Contents have been reproduced by permission of the publishers.
导出
全部期刊列表>>
施普林格自然
最近合集,配们化学
欢迎访问IOP中国网站
GIANT
自然职场线上招聘会
ACS ES&T Engineering
ACS ES&T Water
屿渡论文,编辑服务
何川
苏昭铭
陈刚
姜涛
李闯创
复旦大学
刘立明
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
上海纽约大学
曾林
天津大学
何振宇
史大永
吉林大学
卓春祥
张昊
刘冬生
试剂库存
down
wechat
bug