Physics Letters B最新文献_第2页

IF 4.3 2区物理与天体物理

Physics Letters B Pub Date : 2025-03-28 DOI: 10.1016/j.physletb.2025.139435

C. Wetterich

引用次数: 0

Light nuclei femtoscopy and baryon interactions in 3 GeV Au+Au collisions at RHIC

IF 4.3 2区物理与天体物理

Physics Letters B Pub Date : 2025-03-28 DOI: 10.1016/j.physletb.2025.139412

{"title":"Light nuclei femtoscopy and baryon interactions in 3 GeV Au+Au collisions at RHIC","authors":"","doi":"10.1016/j.physletb.2025.139412","DOIUrl":"10.1016/j.physletb.2025.139412","url":null,"abstract":"<div><div>We report the measurements of proton-deuteron (<em>p</em>-<em>d</em>) and deuteron-deuteron (<em>d</em>-<em>d</em>) correlation functions in Au+Au collisions at <span><math><msqrt><mrow><msub><mrow><mi>s</mi></mrow><mrow><mi>NN</mi></mrow></msub></mrow></msqrt></math></span> = 3 GeV using fixed-target mode with the STAR experiment at the Relativistic Heavy-Ion Collider (RHIC). For the first time, the source size (<span><math><msub><mrow><mi>R</mi></mrow><mrow><mi>G</mi></mrow></msub></math></span>), scattering length (<span><math><msub><mrow><mi>f</mi></mrow><mrow><mn>0</mn></mrow></msub></math></span>), and effective range (<span><math><msub><mrow><mi>d</mi></mrow><mrow><mn>0</mn></mrow></msub></math></span>) are extracted from the measured correlation functions with a simultaneous fit. The spin-averaged <span><math><msub><mrow><mi>f</mi></mrow><mrow><mn>0</mn></mrow></msub></math></span> for <em>p</em>-<em>d</em> and <em>d</em>-<em>d</em> interactions are determined to be -5.28 ± 0.11(stat.) ± 0.82(syst.) fm and -2.62 ± 0.02(stat.) ± 0.24(syst.) fm, respectively. The measured <em>p</em>-<em>d</em> interaction is consistent with theoretical calculations and low-energy scattering experiment results, demonstrating the feasibility of extracting interaction parameters using the femtoscopy technique. The reasonable agreement between the experimental data and the calculations from the transport model indicates that deuteron production in these collisions is primarily governed by nucleon coalescence.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"864 ","pages":"Article 139412"},"PeriodicalIF":4.3,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143739040","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

First law of black holes in the gravitational electromagnetic system with magnetic charge

IF 4.3 2区物理与天体物理

Physics Letters B Pub Date : 2025-03-28 DOI: 10.1016/j.physletb.2025.139432

Jie Jiang , Aofei Sang

{"title":"First law of black holes in the gravitational electromagnetic system with magnetic charge","authors":"Jie Jiang , Aofei Sang","doi":"10.1016/j.physletb.2025.139432","DOIUrl":"10.1016/j.physletb.2025.139432","url":null,"abstract":"<div><div>The quantum corrections in Einstein-Maxwell theory are typically described by introducing higher-curvature terms and non-minimally coupled electromagnetic fields. Our paper investigates the first law of dyonic black holes in the four-dimensional gravitational electromagnetic system with the Lagrangian <span><math><mi>L</mi><mo>(</mo><msub><mrow><mi>g</mi></mrow><mrow><mi>a</mi><mi>b</mi></mrow></msub><mo>,</mo><msub><mrow><mi>R</mi></mrow><mrow><mi>a</mi><mi>b</mi><mi>c</mi><mi>d</mi></mrow></msub><mo>,</mo><msub><mrow><mi>F</mi></mrow><mrow><mi>a</mi><mi>b</mi></mrow></msub><mo>)</mo></math></span>. In previous studies, the magnetic “potential-charge” term in the first law of dyonic black holes was primarily obtained directly from the analytic solutions of black holes or through Komar integral variations in Einstein gravity, with limited applicability. Our analysis reveals that the failure of the Iyer-Wald method to derive the magnetic “potential-charge” term is mainly due to the assumption that the electromagnetic vector potential is regular at the axial poles. Consequently, without requiring regularity of the electromagnetic vector potential at the future Killing horizon and axial poles, we generally derive the first law of asymptotically flat stationary-axisymmetric black holes, which includes both electric and magnetic “potential-charge” terms. Finally, we apply our findings to the general quadric corrected Einstein-Maxwell theory. Our results indicate that the first law with the magnetic charge of black holes might be valid for the Einstein-Maxwell theory with some quantum corrections in the effective region.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"864 ","pages":"Article 139432"},"PeriodicalIF":4.3,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143739033","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Implications of pulsar timing array results for high frequency gravitational waves

IF 4.3 2区物理与天体物理

Physics Letters B Pub Date : 2025-03-27 DOI: 10.1016/j.physletb.2025.139429

Junsong Cang , Yu Gao , Yiming Liu , Sichun Sun

{"title":"Implications of pulsar timing array results for high frequency gravitational waves","authors":"Junsong Cang , Yu Gao , Yiming Liu , Sichun Sun","doi":"10.1016/j.physletb.2025.139429","DOIUrl":"10.1016/j.physletb.2025.139429","url":null,"abstract":"<div><div>Several pulsar timing array (PTA) experiments such as NANOGrav and PPTA recently reported evidence of a gravitational wave (GW) background at nano-Hz frequency band. This signal can originate from scalar-induced gravitational waves (SIGW) generated by the enhanced curvature perturbation. Production of SIGW is expected to be accompanied by formation of primordial black holes (PBH), which can emit GW through binary mergers. Here we perform a joint likelihood inference on PTA datasets in combination with existing limits on PBH abundance and GW density, we derive full Bayesian posteriors for PBH distribution and relevant PBH merger signal. Our results show that analysis using PTA data alone implies significant overproduction of PBHs, and accounting for current PBH limits causes visible shifts in SIGW posterior. If PTA signals are indeed of SIGW origin, the required curvature perturbation amplitude produces PBHs in a narrow mass window of <span><math><mo>[</mo><mn>6</mn><mo>×</mo><msup><mrow><mn>10</mn></mrow><mrow><mo>−</mo><mn>2</mn></mrow></msup><mo>,</mo><mn>2</mn><mo>×</mo><msup><mrow><mn>10</mn></mrow><mrow><mo>−</mo><mn>1</mn></mrow></msup><mo>]</mo><mspace></mspace><msub><mrow><mi>m</mi></mrow><mrow><mo>⊙</mo></mrow></msub></math></span>. Mergers of these PBHs can leave a strong GW signature in <span><math><mo>[</mo><msup><mrow><mn>10</mn></mrow><mrow><mo>−</mo><mn>3</mn></mrow></msup><mo>,</mo><msup><mrow><mn>10</mn></mrow><mrow><mn>5</mn></mrow></msup><mo>]</mo></math></span> Hz frequency range, to be detectable at upcoming interferometers such as LISA, aLIGO, Einstein Telescope, DECIGO and BBO, etc. This offers a multi-frequency opportunity to further scrutinize the source of the observed PTA signal and can potentially improve current PBH constraints by up to 5 orders of magnitudes.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"864 ","pages":"Article 139429"},"PeriodicalIF":4.3,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143739038","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Thermodynamics of Bardeen black holes in restricted phase space

IF 4.3 2区物理与天体物理

Physics Letters B Pub Date : 2025-03-27 DOI: 10.1016/j.physletb.2025.139418

Yahya Ladghami , Brahim Asfour , Amine Bouali , Ahmed Errahmani , Taoufik Ouali

引用次数: 0

Lower bound on the time-to-mass ratio of circular trajectories in spherically symmetric curved spacetimes

IF 4.3 2区物理与天体物理

Physics Letters B Pub Date : 2025-03-27 DOI: 10.1016/j.physletb.2025.139430

Shahar Hod

引用次数: 0

Thermal aspects of central supermassive black holes in a fractal framework