Physics Letters B最新文献

{"title":"Corrigendum to “Cosmology in energy-momentum squared symmetric teleparallel gravity” [Physics Letterrs B, Vol 858, 139608, (2024)]","authors":"Aaqid Bhat, P.K. Sahoo","doi":"10.1016/j.physletb.2025.139571","DOIUrl":"10.1016/j.physletb.2025.139571","url":null,"abstract":"","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"866 ","pages":"Article 139571"},"PeriodicalIF":4.3,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144084169","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":"Pion transverse charge density from e+e− annihilation data and logarithmic dispersion relations","authors":"Enrique Ruiz Arriola ,&nbsp;Pablo Sanchez-Puertas ,&nbsp;Christian Weiss","doi":"10.1016/j.physletb.2025.139585","DOIUrl":"10.1016/j.physletb.2025.139585","url":null,"abstract":"<div><div>The transverse charge density of the pion is extracted from a dispersive analysis of the <span><math><msup><mrow><mi>e</mi></mrow><mrow><mo>+</mo></mrow></msup><msup><mrow><mi>e</mi></mrow><mrow><mo>−</mo></mrow></msup><mo>→</mo><msup><mrow><mi>π</mi></mrow><mrow><mo>+</mo></mrow></msup><msup><mrow><mi>π</mi></mrow><mrow><mo>−</mo></mrow></msup></math></span> exclusive annihilation data. A logarithmic dispersion relation is used to compute the unknown phase of the timelike pion form factor from the modulus obtained from the annihilation cross section. The method is model-independent and permits quantitative uncertainty estimates. The density is obtained with few-percent accuracy down to <span><math><mi>b</mi><mo>∼</mo><mn>0.1</mn></math></span> fm; at smaller distances it depends qualitatively on the assumed high-energy behavior of the timelike form factor. Implications for pion structure and the relevance of pQCD asymptotics are discussed.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"866 ","pages":"Article 139585"},"PeriodicalIF":4.3,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144084166","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":"Investigations on the Maxwell electromagnetic invariant in the spinning and charged horizonless star background","authors":"Yan Peng","doi":"10.1016/j.physletb.2025.139578","DOIUrl":"10.1016/j.physletb.2025.139578","url":null,"abstract":"<div><div>We study properties of the Maxwell electromagnetic invariant in the external region of spinning and charged horizonless stars. We analytically find that the most negative value of the Maxwell electromagnetic invariant is obtained on the equator of the star surface. We are interested in scalar fields non-minimally coupled to the Maxwell electromagnetic invariant. The negative enough Maxwell electromagnetic invariant can lead to a negative effective mass term, which forms a binding potential well for the scalar field. It means that the scalar field coupled to the Maxwell electromagnetic invariant may mostly exist around the surface of the star on the equator. We also numerically investigate the Maxwell electromagnetic invariant outside spinning and charged horizonless compact stars. Our numerical results support the analytical results and provide deeper insights into the behavior of the Maxwell electromagnetic invariant.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"866 ","pages":"Article 139578"},"PeriodicalIF":4.3,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144069505","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":"From modified Tsallis–Rényi entropy to a MOND-like force law, Bekenstein bound, and Landauer principle for black holes","authors":"Everton M.C. Abreu ,&nbsp;Jorge Ananias Neto","doi":"10.1016/j.physletb.2025.139579","DOIUrl":"10.1016/j.physletb.2025.139579","url":null,"abstract":"<div><div>We examine black hole thermodynamics within the framework of modified Rényi entropy and explore its implications in Modified Newtonian Dynamics (MOND), an extension of Newton's second law proposed to explain galaxy rotation curves without invoking dark matter. We conjecture that Tsallis entropy provides an exact description of Bekenstein–Hawking entropy, from which the modified Rényi entropy is derived. Using this formulation, we show that a MOND-like force law emerges naturally from entropic considerations. We also analyze the Bekenstein bound conjecture, which imposes an upper limit on the entropy of confined quantum systems, and verify its validity under the Rényi-modified framework for typical values of the deformation parameter <em>λ</em>. Furthermore, by invoking the Landauer principle, we obtain an expression for the mass loss due to black hole evaporation. These results suggest that modified Rényi statistics, originating from Tsallis entropy, provides a coherent and promising approach to gravitational dynamics and information-theoretic aspects of black hole physics.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"866 ","pages":"Article 139579"},"PeriodicalIF":4.3,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144084168","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":"Probing pion valence quark distribution with beam-charge asymmetry of pion-induced J/ψ production","authors":"Wen-Chen Chang ,&nbsp;Marco Meyer-Conde ,&nbsp;Jen-Chieh Peng ,&nbsp;Stephane Platchkov ,&nbsp;Takahiro Sawada","doi":"10.1016/j.physletb.2025.139582","DOIUrl":"10.1016/j.physletb.2025.139582","url":null,"abstract":"<div><div>We consider the beam-charge asymmetry of the <span><math><mi>J</mi><mo>/</mo><mi>ψ</mi></math></span> production cross sections in <span><math><msup><mrow><mi>π</mi></mrow><mrow><mo>−</mo></mrow></msup></math></span>- versus <span><math><msup><mrow><mi>π</mi></mrow><mrow><mo>+</mo></mrow></msup></math></span>-induced reactions on proton or nuclear targets. We show that the <span><math><mi>J</mi><mo>/</mo><mi>ψ</mi></math></span> production cross section difference between <span><math><msup><mrow><mi>π</mi></mrow><mrow><mo>−</mo></mrow></msup></math></span> and <span><math><msup><mrow><mi>π</mi></mrow><mrow><mo>+</mo></mrow></msup></math></span> beams impinging on a proton target has a positive sign with a magnitude proportional to the product of pion's valence quark distribution, <span><math><msub><mrow><mi>V</mi></mrow><mrow><mi>π</mi></mrow></msub></math></span>, and proton's up and down valence quark distribution difference, <span><math><msup><mrow><mi>u</mi></mrow><mrow><mi>V</mi></mrow></msup><mo>−</mo><msup><mrow><mi>d</mi></mrow><mrow><mi>V</mi></mrow></msup></math></span>. The existing <span><math><mi>J</mi><mo>/</mo><mi>ψ</mi></math></span> production data for <span><math><msup><mrow><mi>π</mi></mrow><mrow><mo>−</mo></mrow></msup><mo>+</mo><mi>p</mi></math></span> and <span><math><msup><mrow><mi>π</mi></mrow><mrow><mo>+</mo></mrow></msup><mo>+</mo><mi>p</mi></math></span> at 39.5 and 200 GeV/c are consistent with the expected positive beam-charge asymmetry. The magnitude of the asymmetry is compared with calculations performed within two theoretical frameworks, the Color Evaporation Model (CEM) and the Non-Relativistic QCD (NRQCD) formalism. We also examine the beam-charge dependence for pion-induced <span><math><mi>J</mi><mo>/</mo><mi>ψ</mi></math></span> production cross sections measured on the neutron-rich platinum target, and find good agreement between the data and theory for both the negative sign and the magnitude of the beam-charge asymmetry. The comparison between data and theoretical calculations for both proton and platinum targets suggests that the beam-charge asymmetry in pion-induced <span><math><mi>J</mi><mo>/</mo><mi>ψ</mi></math></span> production is a viable method of accessing the valence quark distribution of the pion.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"866 ","pages":"Article 139582"},"PeriodicalIF":4.3,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144084225","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":"Forecast constraints on the axion-photon coupling from interstellar medium heating","authors":"Makoto Amakawa ,&nbsp;Tomohiro Fujita ,&nbsp;Shinji Tsujikawa","doi":"10.1016/j.physletb.2025.139574","DOIUrl":"10.1016/j.physletb.2025.139574","url":null,"abstract":"<div><div>In interstellar media characterized by a nonrelativistic plasma of electrons and heavy ions, we study the effect of axion dark matter coupled to photons on the dynamics of an electric field. In particular, we assume the presence of a background magnetic field aligned in a specific direction. We show that there is an energy transfer from the oscillating axion field to photons and then to the plasma induced by forced resonance. This resonance is most prominent for the axion mass <span><math><msub><mrow><mi>m</mi></mrow><mrow><mi>ϕ</mi></mrow></msub></math></span> equivalent to the plasma frequency <span><math><msub><mrow><mi>ω</mi></mrow><mrow><mi>p</mi></mrow></msub></math></span>. Requiring that the heating rate of the interstellar medium caused by the energy transfer does not exceed the observed astrophysical cooling rate, we place forecast constraints on the axion-photon coupling <em>g</em> for several different amplitudes of the background magnetic field <span><math><msub><mrow><mi>B</mi></mrow><mrow><mn>0</mn></mrow></msub></math></span>. By choosing a typical value <span><math><msub><mrow><mi>B</mi></mrow><mrow><mn>0</mn></mrow></msub><mo>=</mo><msup><mrow><mn>10</mn></mrow><mrow><mo>−</mo><mn>6</mn></mrow></msup></math></span> G, we find that, for the resonance mass <span><math><msub><mrow><mi>m</mi></mrow><mrow><mi>ϕ</mi></mrow></msub><mo>=</mo><msub><mrow><mi>ω</mi></mrow><mrow><mi>p</mi></mrow></msub></math></span>, the upper limit of <em>g</em> can be stronger than those derived from other measurements in the literature. With increased values of <span><math><msub><mrow><mi>B</mi></mrow><mrow><mn>0</mn></mrow></msub></math></span>, it is possible to put more stringent constraints on <em>g</em> for a wider range of the axion mass away from the resonance point.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"866 ","pages":"Article 139574"},"PeriodicalIF":4.3,"publicationDate":"2025-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144069507","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":"Updated predictions for toponium production at the LHC","authors":"M.V. Garzelli ,&nbsp;G. Limatola ,&nbsp;S.-O. Moch ,&nbsp;M. Steinhauser ,&nbsp;O. Zenaiev","doi":"10.1016/j.physletb.2025.139532","DOIUrl":"10.1016/j.physletb.2025.139532","url":null,"abstract":"<div><div>We provide an update on QCD predictions for top-quark pair production close to threshold including bound state effects at the Large Hadron Collider. We compute the top-quark pair invariant mass distribution <span><math><mi>d</mi><mi>σ</mi><mo>/</mo><mi>d</mi><msub><mrow><mi>M</mi></mrow><mrow><mi>t</mi><mover><mrow><mi>t</mi></mrow><mrow><mo>¯</mo></mrow></mover></mrow></msub></math></span>, including Coulomb resummation for bound-state effects, as well as threshold resummation for emissions of soft and collinear gluons. We discuss uncertainty estimates and present a proposal for the use of these predictions in experimental analyses.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"866 ","pages":"Article 139532"},"PeriodicalIF":4.3,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143943324","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 impact of future D- and B-meson measurements with the SMOG2 program at LHCb on the determination of nuclear parton distribution functions","authors":"Carlo Flore ,&nbsp;Cynthia Hadjidakis ,&nbsp;Daniel Kikoła ,&nbsp;Aleksander Kusina ,&nbsp;Anton Safronov","doi":"10.1016/j.physletb.2025.139554","DOIUrl":"10.1016/j.physletb.2025.139554","url":null,"abstract":"<div><div>We perform an analysis of the potential impact of future <em>D</em>- and <em>B</em>-meson measurement within the SMOG2 fixed-target program at the LHCb experiment on nuclear parton distribution functions. Following <span><span>[1]</span></span>, we assume that SMOG2 will collect data for five nuclear targets: He, Ne, Ar, Kr, Xe and hydrogen which will provide a baseline for constructing nuclear ratios. The analysis is performed by using the PDF reweighting method. We demonstrate that such a measurement will allow to considerably reduce the current uncertainties of the nuclear gluon distribution and, to some extent, even the uncertainties of the light sea-quark distributions. Furthermore, it will provide the first possibility to systematically study the current assumptions on the <em>A</em>-dependence of the nuclear parton distributions.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"866 ","pages":"Article 139554"},"PeriodicalIF":4.3,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143947638","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":"Determining the density of the sun with neutrinos","authors":"Peter B. Denton ,&nbsp;Charles Gourley","doi":"10.1016/j.physletb.2025.139560","DOIUrl":"10.1016/j.physletb.2025.139560","url":null,"abstract":"<div><div>The discovery of solar neutrinos confirmed that the inner workings of the Sun generally match our theoretical understanding of the fusion process. Solar neutrinos have also played a role in discovering that neutrinos have mass and that they oscillate. We combine the latest solar neutrino data along with other oscillation data from reactors to determine the Sun's density profile. We derive constraints given the current data and show the anticipated improvements with more reactor neutrino data from JUNO constraining the true oscillation parameters and more solar neutrino data from DUNE which should provide a crucial measurement of <em>hep</em> neutrinos.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"866 ","pages":"Article 139560"},"PeriodicalIF":4.3,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144069500","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":"Single Higgs boson production in association with a top quark through FCNSI","authors":"V.M. López-Guerrero ,&nbsp;M.A. Arroyo-Ureña ,&nbsp;J.L. Díaz-Cruz ,&nbsp;O. Félix-Beltrán ,&nbsp;T.A. Valencia-Pérez","doi":"10.1016/j.physletb.2025.139553","DOIUrl":"10.1016/j.physletb.2025.139553","url":null,"abstract":"<div><div>We study the production and possible detection of a single Higgs boson in association with a top quark in proton-proton collisions (<span><math><mi>p</mi><mi>p</mi><mo>→</mo><mi>t</mi><mi>h</mi><mo>+</mo><mi>X</mi></math></span>) at the High-Luminosity Large Hadron Collider. This process absent in the Standard Model is predicted by other models such as the Two-Higgs Doublet Model of type III, which is the theoretical framework adopted in this work. Promising results are found for specific scenarios of the model parameter space, which consist mainly of the parameters <span><math><mi>tan</mi><mo>⁡</mo><mi>β</mi></math></span>, <span><math><mi>cos</mi><mo>⁡</mo><mo>(</mo><mi>α</mi><mo>−</mo><mi>β</mi><mo>)</mo></math></span> and the parameter <span><math><msub><mrow><mi>χ</mi></mrow><mrow><mi>t</mi><mi>c</mi></mrow></msub></math></span>, responsible for the Flavor-Changing Neutral Scalar Interactions (FCNSI). Using the machine learning <em>Boosted Decision Trees</em> algorithm and considering a systematic uncertainty of 5%, we predict <em>signal significances</em> at level of 5<em>σ</em> for <span><math><mi>tan</mi><mo>⁡</mo><mi>β</mi><mo>=</mo><mn>1</mn></math></span>, <span><math><mi>cos</mi><mo>⁡</mo><mo>(</mo><mi>α</mi><mo>−</mo><mi>β</mi><mo>)</mo><mo>=</mo><mn>0.1</mn></math></span>, <span><math><msub><mrow><mi>χ</mi></mrow><mrow><mi>t</mi><mi>c</mi></mrow></msub><mo>=</mo><mn>5</mn></math></span>, and integrated luminosities <span><math><msub><mrow><mi>L</mi></mrow><mrow><mi>int</mi></mrow></msub><mo>≳</mo><mn>2700</mn><mspace></mspace><mi>f</mi><msup><mrow><mi>b</mi></mrow><mrow><mo>−</mo><mn>1</mn></mrow></msup></math></span>. Likewise, we also predict a <em>signal significance</em> <span><math><mi>σ</mi><mo>≈</mo><mn>4.4</mn></math></span> for <span><math><mi>tan</mi><mo>⁡</mo><mi>β</mi><mo>=</mo><mn>1</mn></math></span>, <span><math><mi>cos</mi><mo>⁡</mo><mo>(</mo><mi>α</mi><mo>−</mo><mi>β</mi><mo>)</mo><mo>=</mo><mn>0.1</mn></math></span>, <span><math><msub><mrow><mi>χ</mi></mrow><mrow><mi>t</mi><mi>c</mi></mrow></msub><mo>=</mo><mn>3</mn></math></span>, and integrated luminosities <span><math><msub><mrow><mi>L</mi></mrow><mrow><mi>int</mi></mrow></msub><mo>=</mo><mn>3000</mn><mspace></mspace><mi>f</mi><msup><mrow><mi>b</mi></mrow><mrow><mo>−</mo><mn>1</mn></mrow></msup></math></span>, which consider the upper limit given by HL-LHC projection on <span><math><mrow><mi>BR</mi></mrow><mo>(</mo><mi>t</mi><mo>→</mo><mi>c</mi><mi>h</mi><mo>)</mo></math></span>.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"866 ","pages":"Article 139553"},"PeriodicalIF":4.3,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144069501","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}