Physics Letters B最新文献_第3页

Analytical coordinate time at the second post-Newtonian order 后牛顿二阶的解析坐标时间

IF 4.3 2区物理与天体物理

Physics Letters B Pub Date : 2025-04-17 DOI: 10.1016/j.physletb.2025.139484

Vittorio De Falco , Marco Gallo

引用次数: 0

Existence and stability of (3+1)-dimensional gravastar model in de Rham–Gabadadze–Tolley like massive gravity de Rham-Gabadadze-Tolley类质量引力中（3+1）维重力星模型的存在性与稳定性

IF 4.3 2区物理与天体物理

Physics Letters B Pub Date : 2025-04-16 DOI: 10.1016/j.physletb.2025.139476

Piyali Bhar

{"title":"Existence and stability of (3+1)-dimensional gravastar model in de Rham–Gabadadze–Tolley like massive gravity","authors":"Piyali Bhar","doi":"10.1016/j.physletb.2025.139476","DOIUrl":"10.1016/j.physletb.2025.139476","url":null,"abstract":"<div><div>The physical properties of a (3+1)-D gravastar in the context of massive gravity are discussed in this work. In present investigation, the field equations have been solved for a static, uncharged sphere in order to achieve the gravastar model as proposed by Mazur and Mottola [Mazur and Mottola in Report No. LA-UR-01-5067, (2001); Mazur and Mottola, Proc. Natl. Acad. Sci. USA 101 (2004) 9545]. We address length of thin shell, energy, and entropy for the thin shell containing an ultra-relativistic stiff fluid. Israel matching criteria are used to ensure that the inner and outside geometries join smoothly. The present study within dRGT gravity differs markedly and fundamentally from true gravastars described in [<span><span>arXiv:2302.09690</span><svg><path></path></svg></span>; Mazur and Mottola, Class. Quant. Grav. 32 (2015) 215024], which requires the phase transition occured at <span><math><mi>R</mi><mo>=</mo><mn>2</mn><mi>M</mi></math></span>. It turns out that the existence of the graviton mass entirely alters the behavior of the gravastar. Particularly, when <span><math><mi>m</mi><mo>→</mo><mn>0</mn></math></span>, our findings precisely matched the outcomes of general relativity.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"865 ","pages":"Article 139476"},"PeriodicalIF":4.3,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143867800","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

Search for a new scalar decaying into new spin-1 bosons in four-lepton final states with the ATLAS detector 利用 ATLAS 探测器搜索在四轻子终态中衰变为新自旋-1 玻色子的新标量

IF 4.3 2区物理与天体物理

Physics Letters B Pub Date : 2025-04-16 DOI: 10.1016/j.physletb.2025.139472

{"title":"Search for a new scalar decaying into new spin-1 bosons in four-lepton final states with the ATLAS detector","authors":"","doi":"10.1016/j.physletb.2025.139472","DOIUrl":"10.1016/j.physletb.2025.139472","url":null,"abstract":"<div><div>A search is conducted for a new scalar boson <em>S</em>, with a mass distinct from that of the Higgs boson, decaying promptly into four leptons (<span><math><mi>ℓ</mi><mo>=</mo><mi>e</mi></math></span>, <em>μ</em>) via an intermediate state containing two on-shell, promptly decaying new spin-1 bosons <span><math><msub><mrow><mi>Z</mi></mrow><mrow><mtext>d</mtext></mrow></msub></math></span>: <span><math><mi>S</mi><mo>→</mo><msub><mrow><mi>Z</mi></mrow><mrow><mtext>d</mtext></mrow></msub><msub><mrow><mi>Z</mi></mrow><mrow><mtext>d</mtext></mrow></msub><mo>→</mo><mn>4</mn><mi>ℓ</mi></math></span>, where the <span><math><msub><mrow><mi>Z</mi></mrow><mrow><mtext>d</mtext></mrow></msub></math></span> boson has a mass between 15 and 300 GeV, and the <em>S</em> boson has a mass between either 30 and 115 GeV or 130 and 800 GeV. The search uses proton–proton collision data collected with the ATLAS detector at the Large Hadron Collider with an integrated luminosity of 139 fb<sup>−1</sup> at a centre-of-mass energy of <span><math><msqrt><mrow><mi>s</mi></mrow></msqrt><mo>=</mo><mn>13</mn></math></span> TeV. No significant excess above the Standard Model background expectation is observed. Upper limits at 95% confidence level are set on the production cross-section times branching ratio, <span><math><mi>σ</mi><mo>(</mo><mi>g</mi><mi>g</mi><mo>→</mo><mi>S</mi><mo>)</mo><mo>×</mo><mi>B</mi><mo>(</mo><mi>S</mi><mo>→</mo><msub><mrow><mi>Z</mi></mrow><mrow><mtext>d</mtext></mrow></msub><msub><mrow><mi>Z</mi></mrow><mrow><mtext>d</mtext></mrow></msub><mo>→</mo><mn>4</mn><mi>ℓ</mi><mo>)</mo></math></span>, as a function of the mass of both particles, <span><math><msub><mrow><mi>m</mi></mrow><mrow><mi>S</mi></mrow></msub></math></span> and <span><math><msub><mrow><mi>m</mi></mrow><mrow><mi>Z</mi><mtext>d</mtext></mrow></msub></math></span>.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"865 ","pages":"Article 139472"},"PeriodicalIF":4.3,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143867941","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

Weakly magnetized black holes in Einstein-ModMax theory 爱因斯坦modmax理论中的弱磁化黑洞

IF 4.3 2区物理与天体物理

Physics Letters B Pub Date : 2025-04-16 DOI: 10.1016/j.physletb.2025.139479

Haryanto M. Siahaan

引用次数: 0

First polarisation measurement of coherently photoproduced J/ψ in ultra-peripheral Pb–Pb collisions at sNN=5.02 TeV sNN=5.02 TeV下超外围Pb-Pb碰撞相干光产生J/ψ的第一次偏振测量

IF 4.3 2区物理与天体物理

Physics Letters B Pub Date : 2025-04-15 DOI: 10.1016/j.physletb.2025.139466

{"title":"First polarisation measurement of coherently photoproduced J/ψ in ultra-peripheral Pb–Pb collisions at sNN=5.02 TeV","authors":"","doi":"10.1016/j.physletb.2025.139466","DOIUrl":"10.1016/j.physletb.2025.139466","url":null,"abstract":"<div><div>The first measurement of the polarisation of coherently photoproduced <span><math><mi>J</mi><mo>/</mo><mi>ψ</mi></math></span> mesons in ultra-peripheral Pb–Pb collisions, using data at <span><math><msqrt><mrow><msub><mrow><mi>s</mi></mrow><mrow><mi>NN</mi></mrow></msub></mrow></msqrt><mspace></mspace><mo>=</mo><mspace></mspace><mn>5.02</mn></math></span> TeV, is presented. The <span><math><mi>J</mi><mo>/</mo><mi>ψ</mi></math></span> meson is measured via its dimuon decay channel in the forward rapidity interval <span><math><mo>−</mo><mn>4.0</mn><mo><</mo><mi>y</mi><mo><</mo><mo>−</mo><mn>2.5</mn></math></span> using the ALICE detector at the CERN LHC. An event sample corresponding to an integrated luminosity of 750 <span><math><mi>μ</mi><msup><mrow><mtext>b</mtext></mrow><mrow><mo>−</mo><mn>1</mn></mrow></msup></math></span> ± 5% (syst) is analysed. Hadronic activity is highly suppressed since the interaction is mediated by a photon. The polar and azimuthal angle distributions of the decay muons are measured, and the polarisation parameters <span><math><msub><mrow><mi>λ</mi></mrow><mrow><mi>θ</mi></mrow></msub></math></span>, <span><math><msub><mrow><mi>λ</mi></mrow><mrow><mi>φ</mi></mrow></msub></math></span>, <span><math><msub><mrow><mi>λ</mi></mrow><mrow><mi>θ</mi><mi>φ</mi></mrow></msub></math></span> are extracted. The analysis is carried out in the helicity frame. The results are found to be consistent with a transversely polarised <span><math><mi>J</mi><mo>/</mo><mi>ψ</mi></math></span>. These values are compared with previous measurements by the H1 and ZEUS experiments. The polarisation parameters of coherent <span><math><mi>J</mi><mo>/</mo><mi>ψ</mi></math></span> photoproduction in Pb–Pb collisions are found to be consistent with the <em>s</em>-channel helicity conservation hypothesis.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"865 ","pages":"Article 139466"},"PeriodicalIF":4.3,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143867681","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

Three generations and a trio of trialities 三代人，三种审判

IF 4.3 2区物理与天体物理

Physics Letters B Pub Date : 2025-04-15 DOI: 10.1016/j.physletb.2025.139473

N. Furey , M.J. Hughes

引用次数: 0

Localized electromagnetic perturbations on vector solitons 矢量孤子上的局域电磁扰动

IF 4.3 2区物理与天体物理

Physics Letters B Pub Date : 2025-04-15 DOI: 10.1016/j.physletb.2025.139469

Yulia Galushkina , Eduard Kim , Emin Nugaev , Yakov Shnir

引用次数: 0

Extended Cartan homotopy formula for higher Chern-Simons-Antoniadis-Savvidy theory 高等chen - simons - antoniadis - savvidy理论的扩展Cartan同伦公式