Physics Letters B最新文献

{"title":"The weak gravity conjecture in the Vilkovisky-DeWitt effective action of quantum gravity","authors":"Tommaso Antonelli,&nbsp;Xavier Calmet","doi":"10.1016/j.physletb.2025.139403","DOIUrl":"10.1016/j.physletb.2025.139403","url":null,"abstract":"<div><div>The Weak Gravity Conjecture states that in any consistent theory of quantum gravity in the landscape of string theory, the repulsive force mediated by a U(1) gauge field must be stronger than the attractive force of gravity. In this work, we calculate quantum gravitational corrections to the charge-to-mass ratio of extremal Reissner-Nordström black holes, using the Vilkovisky-deWitt unique effective action approach, since this ratio provides a discriminant to select low-energy effective theories of quantum gravity that fulfill the conjecture. We find that depending on the values of the Wilson coefficients of the effective action, some UV complete theories may fulfill the conjecture, while others may not.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"864 ","pages":"Article 139403"},"PeriodicalIF":4.3,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143644657","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}

{"title":"Are regular black holes from pure gravity classified within the same thermodynamical topology?","authors":"Sheng-Wei Wang ,&nbsp;Shan-Ping Wu ,&nbsp;Shao-Wen Wei","doi":"10.1016/j.physletb.2025.139402","DOIUrl":"10.1016/j.physletb.2025.139402","url":null,"abstract":"<div><div>Regular black holes, which avoid the essential central singularities, can be constructed through various methods, including nonlinear electrodynamics and quantum corrections. Recently, it was shown that via an infinite tower of higher-curvature corrections, one can obtain different regular black hole solutions in any spacetime dimension <span><math><mi>D</mi><mo>≥</mo><mn>5</mn></math></span>. Utilizing the concept of thermodynamical topology, we examine these black holes as topological thermodynamic defects, classifying them into distinct topological categories based on their generalized free energy. We demonstrate that the Hawking temperature of the black hole has at least one zero point at the small horizon radius limit. Under this fact, the regular black holes generated through the purely gravitational theories exhibit universal thermodynamical behaviors, strongly suggesting they belong to the same topological class. We present a comprehensive analysis of these properties, providing a clearer understanding of the fundamental nature of this type of regular black holes and their classification within the framework of thermodynamical topology.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"864 ","pages":"Article 139402"},"PeriodicalIF":4.3,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143644660","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}

{"title":"Black hole in the Dekel-Zhao dark matter profile","authors":"Ali Övgün ,&nbsp;Reggie C. Pantig","doi":"10.1016/j.physletb.2025.139398","DOIUrl":"10.1016/j.physletb.2025.139398","url":null,"abstract":"<div><div>Motivated by the work of Cardoso et al. (2022) <span><span>[15]</span></span> on black holes in galaxies, we derive a new black hole solution surrounded by a Dekel-Zhao (DZ) dark matter profile. The derived metric, influenced by DZ profile parameters, exhibits two distinct regimes: for <span><math><mi>r</mi><mo>≪</mo><msub><mrow><mi>r</mi></mrow><mrow><mi>c</mi></mrow></msub></math></span> (<span><math><msub><mrow><mi>r</mi></mrow><mrow><mi>c</mi></mrow></msub></math></span> is a characteristic radius), exponential corrections dominate, producing significant deviations from the Schwarzschild solution near dense cores, while for <span><math><mi>r</mi><mo>≫</mo><msub><mrow><mi>r</mi></mrow><mrow><mi>c</mi></mrow></msub></math></span>, these corrections vanish, restoring the Schwarzschild metric at large distances. These findings ensure consistency with general relativity in vacuum. The black hole shadow and deflection angle are analyzed, demonstrating that the shadow radius increases with black hole mass (<span><math><msub><mrow><mi>M</mi></mrow><mrow><mi>BH</mi></mrow></msub></math></span>), while higher central densities (<span><math><msub><mrow><mi>ρ</mi></mrow><mrow><mi>ch</mi></mrow></msub></math></span>) result in smaller shadows, reflecting the environmental impact of dense dark matter halos. Photon dynamics reveal how DZ profiles modify critical impact parameters and effective potentials, with gravitational lensing effects highly sensitive to the characteristic radius (<span><math><msub><mrow><mi>r</mi></mrow><mrow><mi>c</mi></mrow></msub></math></span>). Smaller <span><math><msub><mrow><mi>r</mi></mrow><mrow><mi>c</mi></mrow></msub></math></span> values lead to larger deflection angles due to stronger gravitational effects near compact cores. This work highlights the significance dark matter profiles in shaping black hole observables, providing a theoretical foundation for future observational studies and advancing the understanding of dark matter-black hole interactions in astrophysical and cosmological contexts.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"864 ","pages":"Article 139398"},"PeriodicalIF":4.3,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143643631","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}

{"title":"Strings as particle arrays","authors":"Renann Lipinski Jusinskas","doi":"10.1016/j.physletb.2025.139400","DOIUrl":"10.1016/j.physletb.2025.139400","url":null,"abstract":"<div><div>This work discusses the emergence of the Polyakov action from the low-energy limit of an array of relativistic particles with nearest neighbor interactions, which is suggestive of a “microscopic” description of string theory.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"864 ","pages":"Article 139400"},"PeriodicalIF":4.3,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143644659","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}

{"title":"Resonant leptogenesis in minimal U(1)X extensions of the Standard Model","authors":"Arindam Das ,&nbsp;Yuta Orikasa","doi":"10.1016/j.physletb.2025.139395","DOIUrl":"10.1016/j.physletb.2025.139395","url":null,"abstract":"<div><div>We investigate a general <span><math><mi>U</mi><msub><mrow><mo>(</mo><mn>1</mn><mo>)</mo></mrow><mrow><mi>X</mi></mrow></msub></math></span> scenario where we introduce three generations of Standard Model (SM) singlet Right Handed Neutrinos (RHNs) to generate the light neutrino mass through the seesaw mechanism after the breaking of <span><math><mi>U</mi><msub><mrow><mo>(</mo><mn>1</mn><mo>)</mo></mrow><mrow><mi>X</mi></mrow></msub></math></span> and electroweak symmetries. In addition to that, a general <span><math><mi>U</mi><msub><mrow><mo>(</mo><mn>1</mn><mo>)</mo></mrow><mrow><mi>X</mi></mrow></msub></math></span> scenario involves an SM-singlet scalar field and due to the <span><math><mi>U</mi><msub><mrow><mo>(</mo><mn>1</mn><mo>)</mo></mrow><mrow><mi>X</mi></mrow></msub></math></span> symmetry breaking the mass of a neutral beyond the SM (BSM) gauge boson <span><math><msup><mrow><mi>Z</mi></mrow><mrow><mo>′</mo></mrow></msup></math></span> is evolved. The RHNs, charged under the <span><math><mi>U</mi><msub><mrow><mo>(</mo><mn>1</mn><mo>)</mo></mrow><mrow><mi>X</mi></mrow></msub></math></span> scenario, can explain the origin of observed baryon asymmetry through the resonant leptogenesis process. Applying observed neutrino oscillation data we study <span><math><msup><mrow><mi>Z</mi></mrow><mrow><mo>′</mo></mrow></msup></math></span> and BSM scalar-induced processes to reproduce the observed baryon asymmetry. Hence we estimate bounds on the <span><math><mi>U</mi><msub><mrow><mo>(</mo><mn>1</mn><mo>)</mo></mrow><mrow><mi>X</mi></mrow></msub></math></span> gauge coupling <span><math><mo>(</mo><msub><mrow><mi>g</mi></mrow><mrow><mi>X</mi></mrow></msub><mo>)</mo></math></span> and the mass of the <span><math><msup><mrow><mi>Z</mi></mrow><mrow><mo>′</mo></mrow></msup></math></span> <span><math><mo>(</mo><msub><mrow><mi>M</mi></mrow><mrow><msup><mrow><mi>Z</mi></mrow><mrow><mo>′</mo></mrow></msup></mrow></msub><mo>)</mo></math></span> for different <span><math><mi>U</mi><msub><mrow><mo>(</mo><mn>1</mn><mo>)</mo></mrow><mrow><mi>X</mi></mrow></msub></math></span> charges and benchmark masses of the RHN and SM-singlet scalar. Finally, we compare our results with limits obtained from the existing limits from LEP-II and LHC. We find that depending on the <span><math><mi>U</mi><msub><mrow><mo>(</mo><mn>1</mn><mo>)</mo></mrow><mrow><mi>X</mi></mrow></msub></math></span> charges, the masses of RHNs and SM-singlet scalar resonant leptogenesis could provide a stronger limit on <span><math><msub><mrow><mi>g</mi></mrow><mrow><mi>X</mi></mrow></msub></math></span> for <span><math><msub><mrow><mi>M</mi></mrow><mrow><msup><mrow><mi>Z</mi></mrow><mrow><mo>′</mo></mrow></msup></mrow></msub><mo>&gt;</mo><mn>5.8</mn></math></span> TeV which could be probed by high energy scattering experiment in future.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"864 ","pages":"Article 139395"},"PeriodicalIF":4.3,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143644595","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}

{"title":"Composite dark energy and the cosmological tensions","authors":"Adrià Gómez-Valent,&nbsp;Joan Solà Peracaula","doi":"10.1016/j.physletb.2025.139391","DOIUrl":"10.1016/j.physletb.2025.139391","url":null,"abstract":"<div><div>The standard cosmological model currently in force, aka ΛCDM, has been plagued with a variety of phenomenological glitches or tensions in the last decade or so, which puts it against the wall. At the core of the ΛCDM we have a rigid cosmological term, Λ, for the entire cosmic history. This feature is unnatural and even inconsistent in the context of fundamental physics. Recently, the results from the DESI collaboration suggested the possibility that dark energy (DE) should be dynamical rather than just a cosmological constant. Using a generic <span><math><msub><mrow><mi>w</mi></mrow><mrow><mn>0</mn></mrow></msub><msub><mrow><mi>w</mi></mrow><mrow><mi>a</mi></mrow></msub></math></span>CDM parameterization, DESI reported signs of quintessence behavior at <span><math><mn>2.5</mn><mo>−</mo><mn>3.9</mn><mi>σ</mi></math></span> c.l. by combining their BAO data with CMB and different SNIa samples. However, to alleviate the tensions the DE needs more features. In the proposed <em>w</em>XCDM model <span><span>[45]</span></span>, the DE is actually a composite cosmic fluid with two components <span><math><mo>(</mo><mi>X</mi><mo>,</mo><mi>Y</mi><mo>)</mo></math></span> acting sequentially: first <em>X</em> (above a transition redshift <span><math><msub><mrow><mi>z</mi></mrow><mrow><mi>t</mi></mrow></msub></math></span>) and second <em>Y</em> (below <span><math><msub><mrow><mi>z</mi></mrow><mrow><mi>t</mi></mrow></msub></math></span>). Fitting the model to the data, we find that the late component <em>Y</em> behaves as quintessence, like DESI. However, to cure the <span><math><msub><mrow><mi>H</mi></mrow><mrow><mn>0</mn></mrow></msub></math></span> and growth tensions, <em>X</em> must behave as ‘phantom matter’ (PM), which in contrast to phantom DE provides positive pressure at the expense of negative energy density. The PM behavior actually appears in stringy versions of the running vacuum model (RVM). Using the SNIa (considering separately Pantheon+ and DESY5), cosmic chronometers, transversal BAO, LSS data, and the full CMB likelihood from Planck 2018, we find that both tensions can be completely cut down. We also compare the <em>w</em>XCDM with our own results using the standard <em>w</em>CDM and <span><math><msub><mrow><mi>w</mi></mrow><mrow><mn>0</mn></mrow></msub><msub><mrow><mi>w</mi></mrow><mrow><mi>a</mi></mrow></msub></math></span>CDM parameterizations of the DE. In all cases, model <em>w</em>XCDM performs much better. Finally, we have repeated our analysis with BAO 3D data (replacing BAO 2D), and we still find that the main dynamical DE models (including composite ones) provide a much better fit quality compared to ΛCDM. The growth tension is alleviated again, but in contrast, the <span><math><msub><mrow><mi>H</mi></mrow><mrow><mn>0</mn></mrow></msub></math></span>-tension remains significant, which is most likely reminiscent of the internal conflict in the BAO sector.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"864 ","pages":"Article 139391"},"PeriodicalIF":4.3,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143643629","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}

{"title":"Gluon saturation effects in exclusive heavy vector meson photoproduction","authors":"Jani Penttala ,&nbsp;Christophe Royon","doi":"10.1016/j.physletb.2025.139394","DOIUrl":"10.1016/j.physletb.2025.139394","url":null,"abstract":"<div><div>We study exclusive <span><math><mtext>J</mtext><mo>/</mo><mi>ψ</mi></math></span> and ϒ photoproduction for proton and Pb targets in the high-energy limit, with the energy dependence computed using the linear Balitsky–Fadin–Kuraev–Lipatov and the nonlinear Balitsky–Kovchegov evolution equations. The difference between these two evolution equations can be directly attributed to gluon saturation physics. We find that for proton targets there is no difference between the two approaches at the energies of the currently available data, while for Pb targets in <span><math><mtext>J</mtext><mo>/</mo><mi>ψ</mi></math></span> production the data shows a clear preference for the evolution with gluon saturation.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"864 ","pages":"Article 139394"},"PeriodicalIF":4.3,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143643633","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}

{"title":"Poisson electrodynamics on κ-Minkowski space-time","authors":"O. Abla ,&nbsp;M.J. Neves","doi":"10.1016/j.physletb.2025.139385","DOIUrl":"10.1016/j.physletb.2025.139385","url":null,"abstract":"<div><div>Poisson electrodynamics is the semi-classical limit of <span><math><mi>U</mi><mo>(</mo><mn>1</mn><mo>)</mo></math></span> non-commutative gauge theory. It has been studied so far as a theoretical model, where an external field would be the source of the non-commutative effects in space-time. Being the Standard Model of fundamental interactions a local theory, the prediction of observables within it would be drastically altered by such effects. The natural question that arises is: how do particles interact with this field? In this work, we will answer this question using point-like charged particles interacting with the Poisson gauge field, investigating how their trajectories are affected using the <em>κ</em>-Minkowski structure. The interaction arises from the construction of a gauge-invariant action. Using the field solutions, we find the second-order equation for the deformed Lorentz force, indicating possible effects of an emergent gravity due to non-commutativity.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"864 ","pages":"Article 139385"},"PeriodicalIF":4.3,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143644661","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}

{"title":"Corrigendum to “Acceleration as a circular motion along an imaginary circle: Kubo-Martin-Schwinger condition for accelerating field theories in imaginary-time formalism” [Physics Letters B 855 (2024) 138757/PLB 138795]","authors":"Victor E. Ambrus ,&nbsp;Maxim N. Chernodub","doi":"10.1016/j.physletb.2025.139344","DOIUrl":"10.1016/j.physletb.2025.139344","url":null,"abstract":"","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"863 ","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143600696","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}

{"title":"A study of black holes in F(R)-ModMax gravity: Gravitational lensing and constraints from EHT observations","authors":"Khadije Jafarzade ,&nbsp;Zeynab Bazyar ,&nbsp;Mubasher Jamil","doi":"10.1016/j.physletb.2025.139390","DOIUrl":"10.1016/j.physletb.2025.139390","url":null,"abstract":"<div><div>The study of astrophysical phenomena like black hole shadows is an effective approach to properly understand the modified gravity and explore its validity. Motivated by recent astrophysical observations, we consider a black hole (BH) in <span><math><mi>F</mi><mo>(</mo><mi>R</mi><mo>)</mo></math></span>-ModMax gravity and study the optical features such as the shadow's geometrical shape, energy emission rate, and deflection of light. More specifically, we show how the variation of the model parameters imprints specific signatures on these optical quantities. In the following, we consider such black holes as supermassive BHs and evaluate the parameters of the model with shadow size estimates done by the observations of M87* from the Event Horizon Telescope (EHT). According to our findings, the parameter <span><math><msub><mrow><mi>f</mi></mrow><mrow><msub><mrow><mi>R</mi></mrow><mrow><mn>0</mn></mrow></msub></mrow></msub></math></span> plays an effective role in having results consistent with the EHT data such that the resulting shadow of AdS black holes in <span><math><mi>F</mi><mo>(</mo><mi>R</mi><mo>)</mo></math></span>-ModMax gravity agrees with the observational data for <span><math><msub><mrow><mi>f</mi></mrow><mrow><msub><mrow><mi>R</mi></mrow><mrow><mn>0</mn></mrow></msub></mrow></msub><mo>&lt;</mo><mo>−</mo><mn>1</mn></math></span>. However, for dS black holes, a consistent result is observed for <span><math><msub><mrow><mi>f</mi></mrow><mrow><msub><mrow><mi>R</mi></mrow><mrow><mn>0</mn></mrow></msub></mrow></msub><mo>&gt;</mo><mo>−</mo><mn>1</mn></math></span>.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"864 ","pages":"Article 139390"},"PeriodicalIF":4.3,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143644596","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}