Physics Letters B最新文献

Soft-gluon coupling and the TMD parton branching Sudakov form factor 软胶子耦合与TMD部分子分支Sudakov形因子

IF 4.5 2区物理与天体物理

Physics Letters B Pub Date : 2025-07-29 DOI: 10.1016/j.physletb.2025.139762

A. Bermudez Martinez , F. Hautmann , L. Keersmaekers , A. Lelek , M. Mendizabal Morentin , S. Taheri Monfared , A.M. van Kampen

引用次数: 0

The non-orientable spacetime of the eternal black hole 永恒黑洞的不可定向时空

IF 4.5 2区物理与天体物理

Physics Letters B Pub Date : 2025-07-28 DOI: 10.1016/j.physletb.2025.139767

Ovidiu Racorean

引用次数: 0

Type-II seesaw of a non-holomorphic modular A4 symmetry 非全纯模A4对称的ii型跷跷板

IF 4.5 2区物理与天体物理

Physics Letters B Pub Date : 2025-07-24 DOI: 10.1016/j.physletb.2025.139763

Takaaki Nomura , Hiroshi Okada

引用次数: 0

Flavor-changing Lorentz and CPT violation in muonic atoms 介子原子中改变味道的洛伦兹和CPT违和

IF 4.3 2区物理与天体物理

Physics Letters B Pub Date : 2025-07-24 DOI: 10.1016/j.physletb.2025.139755

V. Alan Kostelecký , W.P. McNulty , E. Passemar , N. Sherrill

引用次数: 0

Searching for neutrino self-interactions at future muon colliders 在未来的介子对撞机上寻找中微子的自相互作用

IF 4.5 2区物理与天体物理

Physics Letters B Pub Date : 2025-07-24 DOI: 10.1016/j.physletb.2025.139748

Hongkai Liu , Daiki Ueda

引用次数: 0

Violation of NCQ scaling in hadron elliptic flow in Au+Au collisions at sNN=3.0−7.7GeV sNN=3.0 ~ 7.7GeV下Au+Au碰撞中强子椭圆流中NCQ标度的破坏

IF 4.3 2区物理与天体物理

Physics Letters B Pub Date : 2025-07-23 DOI: 10.1016/j.physletb.2025.139752

Xun Zhu , Gao-Chan Yong

{"title":"Violation of NCQ scaling in hadron elliptic flow in Au+Au collisions at sNN=3.0−7.7GeV","authors":"Xun Zhu , Gao-Chan Yong","doi":"10.1016/j.physletb.2025.139752","DOIUrl":"10.1016/j.physletb.2025.139752","url":null,"abstract":"<div><div>We investigate the number-of-constituent-quark (NCQ) scaling of elliptic flow for various hadrons in non-central Au+Au collisions at <span><math><msqrt><mrow><msub><mrow><mi>s</mi></mrow><mrow><mi>N</mi><mi>N</mi></mrow></msub></mrow></msqrt><mo>=</mo><mn>3.0</mn><mtext>–</mtext><mn>7.7</mn><mspace></mspace><mrow><mi>GeV</mi></mrow></math></span> using the AMPT model with string melting (SM) and pure hadron cascade (HC) modes. For the SM case, NCQ scaling is absent at <span><math><msqrt><mrow><msub><mrow><mi>s</mi></mrow><mrow><mi>N</mi><mi>N</mi></mrow></msub></mrow></msqrt><mo>=</mo><mn>3.0</mn><mspace></mspace><mrow><mi>GeV</mi></mrow></math></span> but is largely restored by <span><math><msqrt><mrow><msub><mrow><mi>s</mi></mrow><mrow><mi>N</mi><mi>N</mi></mrow></msub></mrow></msqrt><mo>=</mo><mn>3.9</mn><mspace></mspace><mrow><mi>GeV</mi></mrow></math></span>. Although quark coalescence occurs at <span><math><msqrt><mrow><msub><mrow><mi>s</mi></mrow><mrow><mi>N</mi><mi>N</mi></mrow></msub></mrow></msqrt><mo>=</mo><mn>3.0</mn><mspace></mspace><mrow><mi>GeV</mi></mrow></math></span>, the lack of NCQ scaling is attributed to the insufficient development of quark elliptic flow and the limited production of strange quarks and antiquarks. This finding suggests that NCQ scaling could not be considered a definitive signature of quark-gluon plasma (QGP) formation in the RHIC fixed-target energy region. For the HC case, as expected, no NCQ scaling is observed. However, a mass ordering in the elliptic flow emerges at <span><math><msqrt><mrow><msub><mrow><mi>s</mi></mrow><mrow><mi>N</mi><mi>N</mi></mrow></msub></mrow></msqrt><mo>=</mo><mn>4.5</mn><mspace></mspace><mrow><mi>GeV</mi></mrow></math></span>, indicating that full thermalization may not be a prerequisite for mass ordering.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"868 ","pages":"Article 139752"},"PeriodicalIF":4.3,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144694495","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

Higher order flow coefficients – a messenger of QCD medium formed in heavy-ion collisions at the Large Hadron Collider 高阶流系数——大型强子对撞机重离子碰撞中形成的QCD介质的信使

IF 4.3 2区物理与天体物理

Physics Letters B Pub Date : 2025-07-23 DOI: 10.1016/j.physletb.2025.139753

Suraj Prasad , Aswathy Menon Kavumpadikkal Radhakrishnan , Raghunath Sahoo , Neelkamal Mallick

{"title":"Higher order flow coefficients – a messenger of QCD medium formed in heavy-ion collisions at the Large Hadron Collider","authors":"Suraj Prasad , Aswathy Menon Kavumpadikkal Radhakrishnan , Raghunath Sahoo , Neelkamal Mallick","doi":"10.1016/j.physletb.2025.139753","DOIUrl":"10.1016/j.physletb.2025.139753","url":null,"abstract":"<div><div>Anisotropic flow and fluctuations are sensitive observables of the initial state effects in heavy ion collisions and are characterized by the medium properties and final state interactions. Using event-shape observables, one can constrain the probability distributions of anisotropic flow coefficients, thus reducing the linear and nonlinear contributions in the measured higher-order harmonics. In this paper, we use transverse spherocity as an event shape observable to study the flow coefficients and elliptic flow fluctuations. Transverse spherocity is found to have a strong correlation with elliptic flow and its fluctuations. We exploit this feature of transverse spherocity to remove the contribution to elliptic flow from higher-order harmonics. The study is performed in Pb–Pb collisions at <span><math><msqrt><mrow><msub><mrow><mi>s</mi></mrow><mrow><mi>NN</mi></mrow></msub></mrow></msqrt><mo>=</mo><mn>5.02</mn></math></span> TeV using a multi-phase transport model. The multi-particle Q-cumulant method estimates the anisotropic flow coefficients, which reduces the non-flow contributions. We observe a stronger system response to the flow coefficients for the events with smaller values of elliptic flow.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"868 ","pages":"Article 139753"},"PeriodicalIF":4.3,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144714341","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

Measurement of the W boson decay branching fraction ratio B(W→cq)/B(W→qq¯′) in proton-proton collisions at s=13TeV s=13TeV质子-质子碰撞中W玻色子衰变分支比B(W→cq)/B（W→qq¯’）的测量

IF 4.3 2区物理与天体物理

Physics Letters B Pub Date : 2025-07-23 DOI: 10.1016/j.physletb.2025.139754

引用次数: 0

Search for absorption of light fermionic dark matter by electron target in xenon dark matter detector 氙暗物质探测器中电子靶对光费米子暗物质的吸收研究

IF 4.3 2区物理与天体物理

Physics Letters B Pub Date : 2025-07-23 DOI: 10.1016/j.physletb.2025.139747

X.P. Geng , B. Zhong , Z.H. Zhang

{"title":"Search for absorption of light fermionic dark matter by electron target in xenon dark matter detector","authors":"X.P. Geng , B. Zhong , Z.H. Zhang","doi":"10.1016/j.physletb.2025.139747","DOIUrl":"10.1016/j.physletb.2025.139747","url":null,"abstract":"<div><div>A search for the absorption of light fermionic dark matter (DM) by electron target in xenon induced by vector (V) and axial-vector (A) operators is performed using the 1.16 tonne⋅year XENONnT electronic recoil data. With no significant signal observed, the one-sided 90% confidence level constraints on the effective coupling between fermionic DM and the electron (<span><math><msub><mrow><mi>σ</mi></mrow><mrow><mi>e</mi></mrow></msub><msub><mrow><mi>v</mi></mrow><mrow><mi>χ</mi></mrow></msub></math></span>) for DM mass <span><math><msub><mrow><mi>m</mi></mrow><mrow><mi>χ</mi></mrow></msub></math></span> ranging from 2 to 180 keV with both V and A operators are derived as results. We present the most stringent constraint for <span><math><msub><mrow><mi>m</mi></mrow><mrow><mi>χ</mi></mrow></msub></math></span> ranging from 14 to 93 keV (9 to 60 keV) with V (A) operator, establishing them as the strongest DM direct detection experiment constraints for <span><math><msub><mrow><mi>m</mi></mrow><mrow><mi>χ</mi></mrow></msub></math></span> ranging from 2 to 180 keV, with the XENON1T hint excluded.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"868 ","pages":"Article 139747"},"PeriodicalIF":4.3,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144714339","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

An investigation of a varying G through Strong Lensing and SNe Ia observations 通过强透镜和Ia型超新星观测对变化G的研究

IF 4.5 2区物理与天体物理

Physics Letters B Pub Date : 2025-07-23 DOI: 10.1016/j.physletb.2025.139756

R.F.L. Holanda , Marcelo Ferreira , Javier E. Gonzalez

{"title":"An investigation of a varying G through Strong Lensing and SNe Ia observations","authors":"R.F.L. Holanda , Marcelo Ferreira , Javier E. Gonzalez","doi":"10.1016/j.physletb.2025.139756","DOIUrl":"10.1016/j.physletb.2025.139756","url":null,"abstract":"<div><div>In this paper, we analyze the potential variation of the gravitational constant <em>G</em> using data from strong gravitational lensing systems and Type Ia supernovae. Testing <span><math><mi>G</mi><mo>(</mo><mi>z</mi><mo>)</mo></math></span> parameterizations where <span><math><mi>G</mi><mo>(</mo><mi>z</mi><mo>)</mo><mo>=</mo><msub><mrow><mi>G</mi></mrow><mrow><mn>0</mn></mrow></msub><mo>(</mo><mn>1</mn><mo>+</mo><msub><mrow><mi>G</mi></mrow><mrow><mn>1</mn></mrow></msub><mi>z</mi><mo>)</mo></math></span> and <span><math><mi>G</mi><mo>(</mo><mi>z</mi><mo>)</mo><mo>=</mo><msub><mrow><mi>G</mi></mrow><mrow><mn>0</mn></mrow></msub><msup><mrow><mo>(</mo><mn>1</mn><mo>+</mo><mi>z</mi><mo>)</mo></mrow><mrow><msub><mrow><mi>G</mi></mrow><mrow><mn>1</mn></mrow></msub></mrow></msup></math></span>, we also account for the influence of <em>G</em> on the luminosity of SNe Ia through the Chandrasekhar mass-luminosity relation. Only the flat universe hypothesis is considered. Constraints from 158 lensing systems and the Pantheon+ sample show no significant evidence of <em>G</em> variation. However, although the results are compatible with no variation, the errors are not yet sufficiently restrictive to rule out any variation of <em>G</em> with high statistical confidence. This study highlights the viability of using combined astrophysical data to probe variations in fundamental constants, suggesting that future surveys could refine these constraints.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"868 ","pages":"Article 139756"},"PeriodicalIF":4.5,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144722371","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