Nuclear Physics BPub Date : 2025-03-07DOI: 10.1016/j.nuclphysb.2025.116859
Debojyoti Mondal, Tanusree Roy, Ujjal Debnath
{"title":"Thermodynamics of Euler-Heisenberg AdS black hole surrounded by quintessence field using shadow","authors":"Debojyoti Mondal, Tanusree Roy, Ujjal Debnath","doi":"10.1016/j.nuclphysb.2025.116859","DOIUrl":"10.1016/j.nuclphysb.2025.116859","url":null,"abstract":"<div><div>We extend the black hole solution of Euler-Heisenberg gravitational theory in AdS space-time by introducing quintessence field in it and studied thermodynamics and phase structure using both semi classical analysis and shadow formalism by considering Λ as thermodynamic pressure. We compare the results obtained by these two methods. The N-type change in temperature for <span><math><mi>P</mi><mo><</mo><msub><mrow><mi>P</mi></mrow><mrow><mi>c</mi></mrow></msub></math></span> can be seen. The nature of Gibbs free energy ensures the second order phase transition for <span><math><mi>P</mi><mo><</mo><msub><mrow><mi>P</mi></mrow><mrow><mi>c</mi></mrow></msub></math></span>, which agrees with the temperature behaviour and then derived heat capacity, Joule-Thomson coefficient to study local stability and heating (or cooling) effect. Assuming black hole as a thermodynamic engine, we calculate the efficiency of Carnot cycle and Rankin cycle and study the impact of various black hole parameters on them. We also studied Ruppeiner thermodynamic geometry in {S,Q} thermodynamic phase space to study the BH at molecular level.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1014 ","pages":"Article 116859"},"PeriodicalIF":2.5,"publicationDate":"2025-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143592427","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
Nuclear Physics BPub Date : 2025-03-05DOI: 10.1016/j.nuclphysb.2025.116860
James T. Wheeler
{"title":"Poincare gauge gravity from nonmetric gravity","authors":"James T. Wheeler","doi":"10.1016/j.nuclphysb.2025.116860","DOIUrl":"10.1016/j.nuclphysb.2025.116860","url":null,"abstract":"<div><div>We consider general linear gauge theory, with independent solder form and connection. These spaces have both torsion and nonmetricity. We show that the Cartan structure equations together with the defining equation for nonmetricity allow the mixed symmetry components of nonmetricity to be absorbed into an altered torsion tensor. Field redefinitions reduce the structure equations to those of Poincare gauge theory, with local Lorentz symmetry and metric compatibility.</div><div>In order to allow recovery the original torsion and nonmetric fields, we replace the definition of nonmetricity by an additional structure equation and demand integrability of the extended system. We show that the maximal Lie algebra compatible with the enlarged set is isomorphic to the conformal Lie algebra. From this Lorentzian conformal geometry, we establish that the difference between the field strength of special conformal transformations and the torsion and is given by the mixed symmetry nonmetricity of an equivalent asymmetric system.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1014 ","pages":"Article 116860"},"PeriodicalIF":2.5,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143600697","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
Nuclear Physics BPub Date : 2025-02-28DOI: 10.1016/j.nuclphysb.2025.116855
Amit Dutta Banik
{"title":"Exploring the dark annihilation: Multi-component asymmetric and symmetric dark matter","authors":"Amit Dutta Banik","doi":"10.1016/j.nuclphysb.2025.116855","DOIUrl":"10.1016/j.nuclphysb.2025.116855","url":null,"abstract":"<div><div>The article describes Boltzmann equations for a potential case of multi-particle dark matter with symmetric and asymmetric dark matter components in a model-independent approach. We focus on the specific scenario where one of the DM candidates remains completely invisible, having only hidden sector interactions with the other dark matter constituent referred to as “dark annihilation”. The possible effect of non-standard expansion of the universe on the dark matter abundance is also taken into account.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1013 ","pages":"Article 116855"},"PeriodicalIF":2.5,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143529788","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
Nuclear Physics BPub Date : 2025-02-28DOI: 10.1016/j.nuclphysb.2025.116856
Sergei Gukov , Babak Haghighat , Nicolai Reshetikhin
{"title":"Foams and KZ-equations in Rozansky-Witten theories","authors":"Sergei Gukov , Babak Haghighat , Nicolai Reshetikhin","doi":"10.1016/j.nuclphysb.2025.116856","DOIUrl":"10.1016/j.nuclphysb.2025.116856","url":null,"abstract":"<div><div>In this paper, we present a geometric description of foams, which are prevalent in topological quantum field theories (TQFTs) based on quantum algebra, and reciprocally explore the geometry of Rozansky-Witten (RW) theory from an algebraic perspective. This approach illuminates various aspects of decorated TQFTs via geometry of the target space <em>X</em> of RW theory. Through the formulation of the Knizhnik-Zamolodchikov (KZ) equation within this geometric framework, we derive the corresponding braiding and associator morphisms. We discuss applications where the target space of RW theory emerges as the Coulomb branch of a compactified 6d SCFT or Little String Theory, with the latter being particularly intriguing as it results in a compact <em>X</em>.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1014 ","pages":"Article 116856"},"PeriodicalIF":2.5,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143550148","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
Nuclear Physics BPub Date : 2025-02-28DOI: 10.1016/j.nuclphysb.2025.116858
S. Salgado
{"title":"Non-linear realizations and invariant action principles in higher gauge theory","authors":"S. Salgado","doi":"10.1016/j.nuclphysb.2025.116858","DOIUrl":"10.1016/j.nuclphysb.2025.116858","url":null,"abstract":"<div><div>We propose an extension of the formalism of non-linear realizations to the case of FDAs. We first consider the case of FDAs carrying one <em>p</em>-form extension and no non-trivial cohomology. We show that it is possible to define large gauge transformations as a direct extension of those induced by their Lie subalgebras, and study the resulting non-linear realizations. Furthermore, we extend the results to the case FDAs with non-trivial cohomology by introducing large gauge transformations that carry the information about the FDA cocycle structure constants. We consider two bosonic examples of this type of gauge algebra, namely, FDA extensions of the Poincaré and Maxwell algebras, write down their dual <span><math><msub><mrow><mi>L</mi></mrow><mrow><mo>∞</mo></mrow></msub></math></span> algebras and study their non-linear realizations and possible invariant action principles. Finally, consider a similar treatment on the FDA of <span><math><mi>D</mi><mo>=</mo><mn>11</mn></math></span> supergravity, by deriving its dual algebra and presenting a non-linear realization that allows a gauge invariant formulation of its action principle.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1013 ","pages":"Article 116858"},"PeriodicalIF":2.5,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143534379","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
Nuclear Physics BPub Date : 2025-02-28DOI: 10.1016/j.nuclphysb.2025.116857
Ankit Anand , Saeed Noori Gashti , Mohammad Reza Alipour , Mohammad Ali S. Afshar
{"title":"Analyzing WGC and WCCC through charged scalar fields fluxes with charged AdS black holes surrounded by perfect fluid dark matter in the CFT thermodynamics","authors":"Ankit Anand , Saeed Noori Gashti , Mohammad Reza Alipour , Mohammad Ali S. Afshar","doi":"10.1016/j.nuclphysb.2025.116857","DOIUrl":"10.1016/j.nuclphysb.2025.116857","url":null,"abstract":"<div><div>In this paper, we conduct a comprehensive investigation into the weak cosmic censorship conjecture (WCCC) for Reissner-Nordström (R-N) AdS black holes that are influenced by Perfect Fluid Dark Matter (PFDM). Our study is framed within the context of Conformal Field Theory (CFT) thermodynamics. We delve into the principles of energy flux and mass-energy equivalence to explore the interplay between the weak gravity conjecture (WGC) and the WCCC. Our analysis begins by examining the interaction between incoming and outgoing energy fluxes, which induces changes in the black hole's properties. By applying the first law of thermodynamics, we assess the validity of the second law in these dynamic scenarios. We also consider equilibrium conditions that involve both absorption and superradiance processes. Utilizing the framework of black hole thermodynamics within CFT, we demonstrate that the WCCC is upheld if the black hole is in or near an extremal state, particularly when it is subjected to radiation and particle absorption. This finding is significant as it reinforces the robustness of the WCCC under these specific conditions. Furthermore, we uncover additional insights by employing mass-energy equivalence principles and conducting second-order approximations near the extremality state. Specifically, we find that when a black hole radiates and its central charge surpasses the scaled electric charge, the emitted superradiant particles adhere to the WGC. This adherence results in the black hole moving away from its extremal state, thereby maintaining the WCCC.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1013 ","pages":"Article 116857"},"PeriodicalIF":2.5,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143534377","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
Nuclear Physics BPub Date : 2025-02-27DOI: 10.1016/j.nuclphysb.2025.116851
Swaraj Pratim Sarmah, Umananda Dev Goswami
{"title":"Magnetic suppression of cosmic rays' flux in f(R) and f(Q) theories of gravity","authors":"Swaraj Pratim Sarmah, Umananda Dev Goswami","doi":"10.1016/j.nuclphysb.2025.116851","DOIUrl":"10.1016/j.nuclphysb.2025.116851","url":null,"abstract":"<div><div>We investigate the effects of magnetic diffusion on the spectrum of ultra-high energy cosmic rays (UHECRs) from a cosmological perspective. To this end, we consider two modified theories of gravity (MTGs), namely, the <span><math><mi>f</mi><mo>(</mo><mi>R</mi><mo>)</mo></math></span> gravity and a symmetric teleparallel gravity, also known as <span><math><mi>f</mi><mo>(</mo><mi>Q</mi><mo>)</mo></math></span> gravity. Utilizing these two MTGs, we calculate the suppression in the flux of UHECRs for a collection of sources. Non-evolution (NE) and cosmic star formation rate (SFR) scenarios have been considered in our calculation of the suppression factor. This study also includes a mixed composition scenario involving the nuclei upto iron (Fe). Furthermore, we provide a parameterization of the suppression factor for the proton and also for the mixed compositions within the <span><math><mi>f</mi><mo>(</mo><mi>R</mi><mo>)</mo></math></span> and <span><math><mi>f</mi><mo>(</mo><mi>Q</mi><mo>)</mo></math></span> theories, considering both NE and SFR scenarios. The influence of the turbulent magnetic field on the suppression factor is also incorporated in our work. Comparative analysis of all our results with the standard ΛCDM model reveals significant effects of MTGs on the suppression factor that the <span><math><mi>f</mi><mo>(</mo><mi>R</mi><mo>)</mo></math></span> power-law model predicts the lowest suppression factor, while the <span><math><mi>f</mi><mo>(</mo><mi>Q</mi><mo>)</mo></math></span> model predicts the highest, and interestingly the results from the standard model fall within the range predicted by these two cosmological models.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1013 ","pages":"Article 116851"},"PeriodicalIF":2.5,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143519973","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Bouncing cosmology and the dynamical stability analysis in f(R,Lm)-gravity","authors":"Shaily , J.K. Singh , Dimple Sethi , Rita Rani , Kazuharu Bamba","doi":"10.1016/j.nuclphysb.2025.116854","DOIUrl":"10.1016/j.nuclphysb.2025.116854","url":null,"abstract":"<div><div>We study the bouncing cosmology in the <span><math><mi>f</mi><mo>(</mo><mi>R</mi><mo>,</mo><msub><mrow><mi>L</mi></mrow><mrow><mi>m</mi></mrow></msub><mo>)</mo></math></span> theory of gravity. In this model, we consider a specific function of <span><math><mi>f</mi><mo>(</mo><mi>R</mi><mo>,</mo><msub><mrow><mi>L</mi></mrow><mrow><mi>m</mi></mrow></msub><mo>)</mo></math></span> which contains the higher order curvature term along with the matter Lagrangian. Here, we parameterize the Hubble parameter with the motivation that it creates a model with bouncing behavior and solves the initial singularity problem during the universe's early evolution. This model achieves a bounce instead, where the universe rapidly contracts and then quickly expands again. The EoS parameter crosses the quintom line in the vicinity of the bouncing position indicating significant changes in the energy density, isotropic pressure, and temperature in the model. The model is highly unstable near the bouncing point. Finally, we analyze the model's dynamic stability in the neighborhood of the bouncing point by examining the sound velocity and the adiabatic index depictions.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1013 ","pages":"Article 116854"},"PeriodicalIF":2.5,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143534378","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
Nuclear Physics BPub Date : 2025-02-26DOI: 10.1016/j.nuclphysb.2025.116853
Zhi-zhong Xing
{"title":"Emergent large flavor mixing from canonical and inverse seesaws?","authors":"Zhi-zhong Xing","doi":"10.1016/j.nuclphysb.2025.116853","DOIUrl":"10.1016/j.nuclphysb.2025.116853","url":null,"abstract":"<div><div>While the canonical seesaw mechanism provides a most natural <em>qualitative</em> interpretation of tiny masses for the three active neutrinos, it offers no explanation for their large flavor mixing effects. The latter can be regarded as an <em>emergent</em> consequence of this mechanism, in which case we are left with an intriguing <em>cross seesaw</em> framework in the mass basis of all the six Majorana neutrinos. To lower the mass scales of heavy neutrinos, one is motivated to invoke the inverse seesaw mechanism but has to pay the price for a <em>fine-tuned</em> cancellation between its two sets of new degrees of freedom, in which case the largeness of active flavor mixing is an <em>emergent</em> phenomenon as well. A comparison between the <em>approximate</em> seesaw relations in the flavor basis and those <em>exact</em> ones in the mass basis is also made.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1013 ","pages":"Article 116853"},"PeriodicalIF":2.5,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143512442","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
Nuclear Physics BPub Date : 2025-02-25DOI: 10.1016/j.nuclphysb.2025.116850
Gabriela Lichtenstein , Michael A. Schmidt , German Valencia , Raymond R. Volkas
{"title":"Z and Higgs boson decays with doubly-charged scalars at one-loop: Current constraints, future sensitivities, and application to lepton-triality models","authors":"Gabriela Lichtenstein , Michael A. Schmidt , German Valencia , Raymond R. Volkas","doi":"10.1016/j.nuclphysb.2025.116850","DOIUrl":"10.1016/j.nuclphysb.2025.116850","url":null,"abstract":"<div><div>We analyse the <em>Z</em> and Higgs boson decays <span><math><mi>Z</mi><mo>→</mo><msup><mrow><mi>ℓ</mi></mrow><mrow><mo>+</mo></mrow></msup><msup><mrow><mi>ℓ</mi></mrow><mrow><mo>−</mo></mrow></msup></math></span> (<span><math><mi>ℓ</mi><mo>=</mo><mi>e</mi><mo>,</mo><mi>μ</mi><mo>,</mo><mi>τ</mi></math></span>), <span><math><mi>H</mi><mo>→</mo><mi>γ</mi><mi>γ</mi></math></span> and <span><math><mi>H</mi><mo>→</mo><mi>Z</mi><mi>γ</mi></math></span> that are induced at one-loop level in models with a doubly-charged isosinglet scalar. After discussing current constraints, we derive the parameter space that will be probed by the HL-LHC and the possible future colliders the ILC, CEPC and FCC. We then apply those constraints to lepton triality models which are based on a discrete <span><math><msub><mrow><mi>Z</mi></mrow><mrow><mn>3</mn></mrow></msub></math></span> family symmetry and were recently studied in the context of charged-lepton flavour-violating processes at Belle II and the proposed <span><math><msup><mrow><mi>μ</mi></mrow><mrow><mo>+</mo></mrow></msup><msup><mrow><mi>μ</mi></mrow><mrow><mo>+</mo></mrow></msup></math></span> and <span><math><msup><mrow><mi>μ</mi></mrow><mrow><mo>+</mo></mrow></msup><msup><mrow><mi>e</mi></mrow><mrow><mo>−</mo></mrow></msup></math></span> collider known as <em>μ</em>TRISTAN. We find that the future constraints that can be imposed by <span><math><mi>Z</mi><mo>→</mo><msup><mrow><mi>ℓ</mi></mrow><mrow><mo>+</mo></mrow></msup><msup><mrow><mi>ℓ</mi></mrow><mrow><mo>−</mo></mrow></msup></math></span> on the lepton flavour conserving couplings of the triality models reduce the viable parameter space to probe lepton flavour violating processes. The constraints from Higgs boson decays are the first on the Higgs portal sector of the triality models.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1013 ","pages":"Article 116850"},"PeriodicalIF":2.5,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143508810","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}