Physics Letters B最新文献

{"title":"Topology and stability of a (2+1)-dimensional black hole in f(Q) gravity","authors":"G.G.L. Nashed ,&nbsp;M. Bedair","doi":"10.1016/j.physletb.2025.139866","DOIUrl":"10.1016/j.physletb.2025.139866","url":null,"abstract":"<div><div>In this work, we construct a novel exact solution in the framework of symmetric teleparallel gravity (STG), specifically in the context of three-dimensional <span><math><mrow><mi>f</mi><mo>(</mo><mi>Q</mi><mo>)</mo></mrow></math></span> gravity, where <span><math><mi>Q</mi></math></span> is the non-metricity scalar. Utilizing a spherically symmetric <span><math><mrow><mo>(</mo><mn>2</mn><mo>+</mo><mn>1</mn><mo>)</mo></mrow></math></span>-dimensional metric and the coincident gauge condition, we derive a new class of black hole solutions characterized by an analytic form of <span><math><mrow><mi>f</mi><mo>(</mo><mi>Q</mi><mo>)</mo></mrow></math></span> that generalizes the Banados-Teitelboim-Zanelli (BTZ) solution. The resulting solution generalizes the BTZ black hole by incorporating a dimensional deformation parameter <span><math><msub><mi>a</mi><mn>1</mn></msub></math></span>, yielding deviations from general relativity due to non-metricity corrections. This solution reduces to the standard BTZ geometry in the limit of vanishing deformation parameter <span><math><msub><mi>a</mi><mn>1</mn></msub></math></span>, while exhibiting distinctive features when <span><math><mrow><msub><mi>a</mi><mn>1</mn></msub><mo>≠</mo><mn>0</mn></mrow></math></span>, including deviation in curvature and non-metricity scalars. We conduct a thorough analysis of the thermodynamic properties of the resulting black hole, including its Hawking temperature, entropy, and heat capacity, confirming its thermodynamic stability and demonstrating the validity of the first law of thermodynamics. Furthermore, we explore the topological classification of the black hole using the generalized free energy method, demonstrating the existence of nontrivial topological charges associated with its horizon structure.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"869 ","pages":"Article 139866"},"PeriodicalIF":4.5,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145045146","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}

{"title":"Long-lived quasinormal modes and asymptotic tails of regular Schwarzschild-like black holes in the presence of a magnetic field","authors":"Akbar Davlataliev ,&nbsp;Bakhtiyor Narzilloev ,&nbsp;Ibrar Hussain ,&nbsp;Ahmadjon Abdujabbarov ,&nbsp;Bobomurat Ahmedov","doi":"10.1016/j.physletb.2025.139868","DOIUrl":"10.1016/j.physletb.2025.139868","url":null,"abstract":"<div><div>We analyze the evolution of perturbations of a (charged) massive scalar field near a regular Simpson-Visser black hole, allowing for a non-zero external magnetic field. We show that the damping rate of the quasinormal frequencies is strongly suppressed by both the magnetic field and the mass term, with indications that arbitrarily long-lived modes, or quasi-resonances, may exist in the spectrum. In the time domain, the quasinormal ringing transitions into slowly decaying oscillatory tails, which are qualitatively distinct from the massive tails observed in the absence of a magnetic field. For nonzero multipole and azimuthal numbers, the power-law envelope characteristic of cases without a magnetic field transforms into an oscillatory envelope that cannot be easily fitted with a simple analytical formula.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"869 ","pages":"Article 139868"},"PeriodicalIF":4.5,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145057109","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}

{"title":"The classical equations of motion of quantized gauge theories, Part 2: Electromagnetism","authors":"David E. Kaplan ,&nbsp;Tom Melia ,&nbsp;Surjeet Rajendran","doi":"10.1016/j.physletb.2025.139871","DOIUrl":"10.1016/j.physletb.2025.139871","url":null,"abstract":"<div><div>In this and companion papers, we show that quantum field theories with gauge symmetries permit a broader class of classical dynamics than typically assumed. In this article, we show that the quantization of electromagnetism permits the existence of classical electric field states that do not obey Gauss’s law. These states are gauge invariant and their time evolution can be consistently described using the Schrödinger equation. The time evolution of these states is such that at the classical level, the full set of Maxwell’s equations would appear to hold, with the physical effects of these states being attributable to an auxiliary, static “shadow” charge density with no internal degrees of freedom. This density could affect the dynamics of charged particles in our universe and it may thus be of observational interest.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"869 ","pages":"Article 139871"},"PeriodicalIF":4.5,"publicationDate":"2025-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145045145","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}

{"title":"Determination of the ϕ-meson production process and its absorption cross section via directed flow","authors":"Jan Steinheimer ,&nbsp;Tom Reichert ,&nbsp;Marcus Bleicher","doi":"10.1016/j.physletb.2025.139870","DOIUrl":"10.1016/j.physletb.2025.139870","url":null,"abstract":"<div><div>It is shown that the directed flow of <span><math><mi>ϕ</mi></math></span>-mesons in Au+Au collisions at <span><math><mrow><msqrt><msub><mi>s</mi><mrow><mi>N</mi><mi>N</mi></mrow></msub></msqrt><mo>=</mo><mn>3</mn></mrow></math></span> GeV, is sensitive to the production and the absorption cross section of the <span><math><mi>ϕ</mi></math></span> in a nuclear medium. This provides a new observable to constrain the in-medium properties of the <span><math><mi>ϕ</mi></math></span> which is independent of its absolute production rate. STAR data disfavor any significant <span><math><mi>ϕ</mi></math></span>-N absorption in dense nuclear matter and are consistent with a very small cross section of the <span><math><mi>ϕ</mi></math></span> comparable to the vacuum cross section. The similarity of the <span><math><mi>ϕ</mi></math></span>-meson and proton directed flow also indicates that the <span><math><mi>ϕ</mi></math></span> is produced in conjunction with a baryon.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"869 ","pages":"Article 139870"},"PeriodicalIF":4.5,"publicationDate":"2025-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145045143","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}

{"title":"Search for Higgs boson exotic decays into Lorentz-boosted light bosons in the four-τ final state at s=13TeV with the ATLAS detector","authors":"The ATLAS Collaboration","doi":"10.1016/j.physletb.2025.139843","DOIUrl":"10.1016/j.physletb.2025.139843","url":null,"abstract":"<div><div>A search for exotic decays of the Higgs boson into a pair of low-mass scalars that subsequently decay into <span><math><mi>τ</mi></math></span>-leptons, <span><math><mrow><mi>H</mi><mo>→</mo><mi>a</mi><mi>a</mi><mo>→</mo><msup><mi>τ</mi><mo>+</mo></msup><msup><mi>τ</mi><mo>−</mo></msup><msup><mi>τ</mi><mo>+</mo></msup><msup><mi>τ</mi><mo>−</mo></msup></mrow></math></span>, is presented. In models with Yukawa-like couplings, the decay to <span><math><mi>τ</mi></math></span>-leptons is favoured for light <span><math><mi>a</mi></math></span>-bosons, with mass in the range of <span><math><mrow><mn>2</mn><msub><mi>m</mi><mi>τ</mi></msub><mo>&lt;</mo><msub><mi>m</mi><mi>a</mi></msub><mo>&lt;</mo><mn>2</mn><msub><mi>m</mi><mi>b</mi></msub></mrow></math></span>. Results are presented in the range of <span><math><mrow><mn>4</mn><mspace></mspace><mrow><mi>GeV</mi></mrow><mo>&lt;</mo><msub><mi>m</mi><mi>a</mi></msub><mo>&lt;</mo><mn>15</mn><mspace></mspace><mrow><mi>GeV</mi></mrow></mrow></math></span> using the <span><math><mrow><mn>140</mn><mspace></mspace><msup><mrow><mi>fb</mi></mrow><mrow><mo>−</mo><mn>1</mn></mrow></msup></mrow></math></span> of proton–proton collisions at <span><math><mrow><msqrt><mi>s</mi></msqrt><mo>=</mo><mn>13</mn><mspace></mspace><mrow><mi>TeV</mi></mrow></mrow></math></span> recorded with the ATLAS detector during <span><math><mrow><mrow><mi>Run</mi></mrow><mspace></mspace><mn>2</mn></mrow></math></span> of the Large Hadron Collider. This search focuses on the scenario where, for both di-<span><math><mi>τ</mi></math></span> pairs, one of the <span><math><mi>τ</mi></math></span>-leptons decays to hadrons and neutrinos, while the other decays to a muon and neutrinos. In this mass range, the <span><math><mrow><mi>a</mi><mo>→</mo><msup><mi>τ</mi><mo>+</mo></msup><msup><mi>τ</mi><mo>−</mo></msup></mrow></math></span> is Lorentz-boosted and a dedicated muon removal technique is used to reconstruct the di-<span><math><mi>τ</mi></math></span> pairs. No significant excess above the Standard Model background prediction is observed. Upper limits on <span><math><mrow><mo>(</mo><mi>σ</mi><mrow><mo>(</mo><mi>H</mi><mo>)</mo></mrow><mo>/</mo><msub><mi>σ</mi><mtext>SM</mtext></msub><mrow><mo>(</mo><mi>H</mi><mo>)</mo></mrow><mo>)</mo><mo>×</mo><mi>B</mi><mrow><mo>(</mo><mi>H</mi><mo>→</mo><mi>a</mi><mi>a</mi><mo>→</mo><mn>4</mn><mi>τ</mi><mo>)</mo></mrow></mrow></math></span> at <span><math><mrow><mn>95</mn><mspace></mspace><mo>%</mo></mrow></math></span> confidence level are provided, ranging from 0.03 to 0.10 depending on the <span><math><mi>a</mi></math></span>-boson mass.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"870 ","pages":"Article 139843"},"PeriodicalIF":4.5,"publicationDate":"2025-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145333706","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}

{"title":"An exact five dimensional Weyl-geometry Gauss-Bonnet black hole","authors":"Sebastian Bahamonde ,&nbsp;Máximo Bañados","doi":"10.1016/j.physletb.2025.139869","DOIUrl":"10.1016/j.physletb.2025.139869","url":null,"abstract":"<div><div>We present a new exact black hole solution of a 5-dimensional Weyl-geometry Gauss-Bonnet theory of gravity. The Euclidean sector defines a fully regular metric coupled to the Weyl vector field. The Euclidean action and entropy are computed, with the latter following the simple <span><math><mrow><mi>A</mi><mo>/</mo><mn>4</mn></mrow></math></span> form plus a term linear in the horizon radius, characteristic of Gauss-Bonnet couplings.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"869 ","pages":"Article 139869"},"PeriodicalIF":4.5,"publicationDate":"2025-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145045144","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}

{"title":"Revisiting the electron EDM in the NMSSM","authors":"Kaifei Ning ,&nbsp;Michael J. Ramsey-Musolf","doi":"10.1016/j.physletb.2025.139867","DOIUrl":"10.1016/j.physletb.2025.139867","url":null,"abstract":"<div><div>The Next-to-Minimal Supersymmetric Standard Model (NMSSM) with explicit CP violation offers a promising framework for explaining the observed baryon asymmetry while remaining consistent with stringent electric dipole moment (EDM) bounds. In this work, we identify a previously overlooked set of two-loop diagrams that contribute to fermion EDMs in the NMSSM. Our analysis of the electron EDM shows that, for certain NMSSM specific CP-violating phases, these diagrams partially cancel existing contributions, thereby relaxing the associated constraints. In other phases, the diagrams dominate and tighten the bounds, which in turn necessitates more finely tuned parameters to reconcile successful baryogenesis with current EDM limits.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"869 ","pages":"Article 139867"},"PeriodicalIF":4.5,"publicationDate":"2025-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145103914","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}

{"title":"Analytic result of Higgs boson decay to gluons with full quark mass dependence","authors":"Jian Wang ,&nbsp;Yefan Wang","doi":"10.1016/j.physletb.2025.139865","DOIUrl":"10.1016/j.physletb.2025.139865","url":null,"abstract":"<div><div>We report the first analytic calculation of the Higgs boson decay width to gluons up to next-to-leading order in quantum chromodynamics including full dependence on the bottom and charm quark masses. The interference between top- and bottom/charm-quark-induced amplitudes provides unexpectedly large contributions because the large logarithms of the bottom (charm) quark masses over the Higgs boson mass compensate for the suppression of the Yukawa coupling. These logarithms exhibit a unique structure distinct from Sudakov resummation and more complex than the Higgs-gluon-gluon form factor. Our results demonstrate that the previous calculation with massless bottom and charm quarks overestimates the decay width by nearly 20 %. The prediction of the partial decay width with massive quarks provides essential theory input needed in the precise determination of Higgs couplings at future colliders.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"869 ","pages":"Article 139865"},"PeriodicalIF":4.5,"publicationDate":"2025-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145045142","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}

{"title":"Microscopic nuclear structure study of 229Th by projected shell model","authors":"Zi-Rui Chen ,&nbsp;Long-Jun Wang ,&nbsp;Yuanbin Wu","doi":"10.1016/j.physletb.2025.139858","DOIUrl":"10.1016/j.physletb.2025.139858","url":null,"abstract":"<div><div><span><math><msup><mrow></mrow><mn>229</mn></msup></math></span>Th, a crucial candidate for nuclear clocks and many other applications, is a typical heavy nucleus with an extremely low-energy isomeric state <span><math><msup><mrow></mrow><mrow><mn>229</mn><mi>m</mi></mrow></msup></math></span>Th. A detailed study of the nuclear structure of <span><math><msup><mrow></mrow><mn>229</mn></msup></math></span>Th is performed here by the microscopic model of state-of-the-art projected shell model. Our calculation describes well low-energy levels of <span><math><msup><mrow></mrow><mn>229</mn></msup></math></span>Th, and provides a reduced transition probability <span><math><mrow><mi>B</mi><mo>(</mo><mi>M</mi><mn>1</mn><mo>)</mo></mrow></math></span> of 0.0240 W.u. for the isomeric transition which agrees well with the radiative lifetime of <span><math><msup><mrow></mrow><mrow><mn>229</mn><mi>m</mi></mrow></msup></math></span>Th measured recently. Our result supports a small multipole mixing for the cross-band transition of the second-excited state of <span><math><msup><mrow></mrow><mn>229</mn></msup></math></span>Th, suggesting that further investigations on the inconsistencies in the decay of the second-excited state should be necessary. The physics behind these properties is revealed by the analysis of the nuclear wave functions. Our findings provide a deep insight into <span><math><msup><mrow></mrow><mn>229</mn></msup></math></span>Th from the microscopic nuclear structure point of view, and offer the chance for further studies for nuclear clocks and relevant topics by microscopic nuclear structure theory.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"869 ","pages":"Article 139858"},"PeriodicalIF":4.5,"publicationDate":"2025-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145019960","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}

{"title":"Corrigendum to “Neutrinoless ββ decay nuclear matrix elements complete up to N2LO in heavy nuclei” [Physics Letters B 860 (2025) 139181]","authors":"Daniel Castillo ,&nbsp;Lotta Jokiniemi ,&nbsp;Pablo Soriano ,&nbsp;Javier Menéndez","doi":"10.1016/j.physletb.2025.139851","DOIUrl":"10.1016/j.physletb.2025.139851","url":null,"abstract":"","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"869 ","pages":"Article 139851"},"PeriodicalIF":4.5,"publicationDate":"2025-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144933492","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}