Physics Letters B最新文献_第2页

A new class of semiclassical gravity solutions, gravitational quantum stealths and regular Cauchy horizons 一类新的半经典引力解，引力量子隐形和正则柯西视界

IF 4.5 2区物理与天体物理

Physics Letters B Pub Date : 2026-03-07 DOI: 10.1016/j.physletb.2026.140349

Benito A. Juárez-Aubry

引用次数: 0

(H)ALPing the 511 keV line: A thermal DM interpretation of the 511 keV emission (H)ALPing 511kev线：511kev发射的热DM解释

IF 4.5 2区物理与天体物理

Physics Letters B Pub Date : 2026-03-07 DOI: 10.1016/j.physletb.2026.140331

Mohammad Aghaie , Pedro De la Torre Luque , Alessandro Dondarini , Daniele Gaggero , Giulio Marino , Paolo Panci

引用次数: 0

First study of the nuclear response to fast hadrons via angular correlations between pions and slow protons in electron-nucleus scattering 电子-核散射中π介子与慢质子角相关性对快速强子核响应的首次研究

IF 4.5 2区物理与天体物理

Physics Letters B Pub Date : 2026-03-01 Epub Date: 2026-02-06 DOI: 10.1016/j.physletb.2026.140250

{"title":"First study of the nuclear response to fast hadrons via angular correlations between pions and slow protons in electron-nucleus scattering","authors":"","doi":"10.1016/j.physletb.2026.140250","DOIUrl":"10.1016/j.physletb.2026.140250","url":null,"abstract":"<div><div>We report on the first measurement of angular correlations between high-energy pions and slow protons in electron-nucleus (<em>eA</em>) scattering, providing a new probe of how a nucleus responds to a fast-moving quark. The experiment employed the CLAS detector with a 5-GeV electron beam incident on deuterium, carbon, iron, and lead targets. For heavier nuclei, the pion-proton correlation function is more spread-out in azimuth than for lighter ones, and this effect is more pronounced in the <em>πp</em> channel than in earlier <em>ππ</em> studies. The proton-to-pion yield ratio likewise rises with nuclear mass, although the increase appears to saturate for the heaviest targets. These trends are qualitatively reproduced by state-of-the-art <em>eA</em> event generators, including <span>BeAGLE</span>, eHIJING, and <span>GiBUU</span>, indicating that current descriptions of target fragmentation rest on sound theoretical footing. At the same time, the precision of our data exposes model-dependent discrepancies, delineating a clear path for future improvements in the treatment of cold-nuclear matter effects in <em>eA</em> scattering.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"874 ","pages":"Article 140250"},"PeriodicalIF":4.5,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146134626","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

On BPS equations of generalized SU(2) Yang-Mills-Higgs model with scalars-dependent coupling θ-term 具有标量依赖耦合θ-项的广义SU(2) Yang-Mills-Higgs模型的BPS方程

IF 4.5 2区物理与天体物理

Physics Letters B Pub Date : 2026-03-01 Epub Date: 2026-02-09 DOI: 10.1016/j.physletb.2026.140267

Mulyanto, Emir Syahreza Fadhilla, Ardian Nata Atmaja

{"title":"On BPS equations of generalized SU(2) Yang-Mills-Higgs model with scalars-dependent coupling θ-term","authors":"Mulyanto, Emir Syahreza Fadhilla, Ardian Nata Atmaja","doi":"10.1016/j.physletb.2026.140267","DOIUrl":"10.1016/j.physletb.2026.140267","url":null,"abstract":"<div><div>We consider a most general <em>SU</em>(2) Yang-Mills-Higgs model consist of terms up to quadratic in first-derivative of the fields, that is the generalized <em>SU</em>(2) Yang-Mills-Higgs with additional scalars-dependent coupling <em>θ</em>-term. Using the BPS Lagrangian method we try to find Bogomolnyi’s equations for BPS monopoles and dyons by taking most general BPS Lagrangian density. We obtain more general Bogomolnyi’s equations and a relation between all scalars dependent couplings. From these equations we can see there is a family of BPS monopole solutions parameterized by a real constant <em>γ</em>, while for BPS dyons there is an additional parameter which is the coupling of <em>θ</em>-term. Interestingly even for a single BPS dyon we find the value of <em>θ</em>-term’s coupling only gives additional contribution to electric charge of BPS Dyons, which is in accordance with Witten’s result in Phys.Lett. B 86 (1979), and thus can determine whether we get BPS monopoles or BPS dyons. In the presence of the coupling of <em>θ</em>-term, it is now possible to obtain Julia-Zee BPS dyons where all scalar-dependent couplings are non-constants, which is the extension to the BPS Julia-Zee dyons proposed in Eur.Phys.J. C 82, 602 (2022).</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"874 ","pages":"Article 140267"},"PeriodicalIF":4.5,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146146649","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Unveiling the sea: universality of the transverse momentum dependent quark distributions at small x 揭示海洋：小x处横向动量相关夸克分布的普适性

IF 4.5 2区物理与天体物理

Physics Letters B Pub Date : 2026-03-01 Epub Date: 2026-02-11 DOI: 10.1016/j.physletb.2026.140271

Paul Caucal , Marcos Guerrero Morales , Edmond Iancu , Farid Salazar , Feng Yuan

引用次数: 0

Machine learning the single-Λ hypernuclei with neural-network quantum states 具有神经网络量子态的单个-Λ超核机器学习

IF 4.5 2区物理与天体物理

Physics Letters B Pub Date : 2026-03-01 Epub Date: 2026-02-22 DOI: 10.1016/j.physletb.2026.140285

Zi-Xiao Zhang , Yi-Long Yang , Wan-Bing He , Peng-Wei Zhao , Bing-Nan Lu , Yu-Gang Ma

{"title":"Machine learning the single-Λ hypernuclei with neural-network quantum states","authors":"Zi-Xiao Zhang , Yi-Long Yang , Wan-Bing He , Peng-Wei Zhao , Bing-Nan Lu , Yu-Gang Ma","doi":"10.1016/j.physletb.2026.140285","DOIUrl":"10.1016/j.physletb.2026.140285","url":null,"abstract":"<div><div>A thorough description of baryonic system beyond first-generation quark sector is indispensable for the maturation of nuclear <em>ab initio</em> methods. This study pioneers the application of neural-network quantum states to hypernuclei, with trainable parameters determined by variational Monte Carlo approach (VMC-NQS). In order to reduce the numerical uncertainty and treat the nucleons and hyperons in a unified manner, spinor grouping (SG) method is proposed to analytically integrate out isospin degrees of freedom. With SG method and spin symmetry enforcement, the Λ separation energies of <em>s</em>-shell hypernuclei are computed with one-thousandth level accuracy and benchmarked against existing results from stochastic variational method, showing superior performance. By comparing two different sets of Hamiltonian based on pionless effective field theory (<span><math><mrow><mi>π</mi><mi≯</mi></mrow></math></span>EFT), we choose an optimal model and further carry out calculations of selected <em>p</em>-shell charge-symmetric hypernuclei with mass number up to 13, exhibiting satisfactory consistency with experimental results. Our work underscores the potential of the VMC-NQS family for the in-depth probing of hypernuclear systems.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"874 ","pages":"Article 140285"},"PeriodicalIF":4.5,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146777457","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

On the definition of the nucleon axial charge density 核子轴向电荷密度的定义

IF 4.5 2区物理与天体物理

Physics Letters B Pub Date : 2026-03-01 Epub Date: 2026-02-09 DOI: 10.1016/j.physletb.2026.140263

J. Yu. Panteleeva , E. Epelbaum , J. Gegelia , U.-G. Meißner

引用次数: 0

Resonant states in three- and four-body hypernuclear systems 三体和四体超核系统的共振态

IF 4.5 2区物理与天体物理

Physics Letters B Pub Date : 2026-03-01 Epub Date: 2026-01-30 DOI: 10.1016/j.physletb.2026.140214

Rimantas Lazauskas , Arnoldas Deltuva , Daniel Gazda , Martin Schäfer

引用次数: 0

Principal components of nuclear mass model residuals 核质量模型残差的主成分