Nuclear Physics B最新文献

{"title":"Hidden conformal symmetry and holography for accelerating Kerr–Newman black holes","authors":"Haryanto M. Siahaan","doi":"10.1016/j.nuclphysb.2025.117096","DOIUrl":"10.1016/j.nuclphysb.2025.117096","url":null,"abstract":"<div><div>We investigate the emergence of hidden conformal symmetry in the scalar wave equation for the accelerating Kerr–Newman black hole with arbitrary acceleration. By applying a near-horizon, low-frequency approximation, we reduce the quartic radial function to an effective quadratic form that reveals an underlying <span><math><mi>S</mi><mi>L</mi><msub><mrow><mo>(</mo><mn>2</mn><mo>,</mo><mi>R</mi><mo>)</mo></mrow><mrow><mi>L</mi></mrow></msub><mo>×</mo><mi>S</mi><mi>L</mi><msub><mrow><mo>(</mo><mn>2</mn><mo>,</mo><mi>R</mi><mo>)</mo></mrow><mrow><mi>R</mi></mrow></msub></math></span> symmetry in the radial equation. This allows us to identify left- and right-moving temperatures and match the wave operator to the Casimir of a two-dimensional conformal field theory (CFT₂). We compute the central charges from the near-horizon geometry of a near-extremal black hole and verify that the Cardy formula reproduces the Bekenstein–Hawking entropy. As further support for the Kerr/CFT correspondence in accelerating backgrounds, we analyze scalar field scattering and show that the absorption cross section agrees with the finite-temperature prediction from dual CFT₂ correlators. Our results provide both thermodynamic and dynamical evidence that the near-horizon region of the accelerating Kerr–Newman black hole admits a consistent holographic description by using the Kerr/CFT correspondence.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1018 ","pages":"Article 117096"},"PeriodicalIF":2.8,"publicationDate":"2025-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144912740","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 N2HDM, Entropy Production and Stochastic Gravitational Waves","authors":"Arnab Chaudhuri ,&nbsp;Kazunori Kohri","doi":"10.1016/j.nuclphysb.2025.117098","DOIUrl":"10.1016/j.nuclphysb.2025.117098","url":null,"abstract":"<div><div>This study undertakes a reconsideration of the potential for a first-order electroweak phase transition, focusing on the next-to-minimal two Higgs doublet model (N2HDM). Our exploration spans diverse parameter spaces associated with the phase transition, with a particular emphasis on examining the generation of stochastic Gravitational Waves (GW) resulting from this transition. The obtained results are meticulously compared against data from prominent gravitational wave observatories, and the possibility of their detection in the future GW observations has been established. In passing by we analyze the strength of the phase transition through the production of entropy during the electroweak phase transition.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1018 ","pages":"Article 117098"},"PeriodicalIF":2.8,"publicationDate":"2025-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144911508","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Second-order superintegrable systems and Weylian geometry","authors":"Andreas Vollmer","doi":"10.1016/j.nuclphysb.2025.117095","DOIUrl":"10.1016/j.nuclphysb.2025.117095","url":null,"abstract":"<div><div>Abundant second-order maximally conformally superintegrable Hamiltonian systems are re-examined, revealing their underlying natural Weyl structure and offering a clearer geometric context for the study of Stäckel transformations (also known as coupling constant metamorphosis). This also allows us to naturally extend the concept of conformal superintegrability from the realm of conformal geometries to that of Weyl structures. It enables us to interpret superintegrable systems of the above type as semi-Weyl structures, a concept related to statistical manifolds and affine hypersurface theory.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1019 ","pages":"Article 117095"},"PeriodicalIF":2.8,"publicationDate":"2025-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144988716","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Entanglement entropy and its linear response following a global quench in holographic Gauss-Bonnet gravity","authors":"Sabyasachi Maulik ,&nbsp;Soumen Pari","doi":"10.1016/j.nuclphysb.2025.117084","DOIUrl":"10.1016/j.nuclphysb.2025.117084","url":null,"abstract":"<div><div>Growth of entanglement entropy in time-dependent states formed due to a global quench in holographic conformal field theories which admit an Einstein-Gauss-Bonnet dual gravity description is studied. The global quench in the bulk is modelled by an AdS-Vaidya solution with an electric charge. It is observed that the Gauss-Bonnet correction parameter leads to faster thermalization, and lower saturation entropy. The rate of growth also depends crucially on the correction, and may exceed 1 in general spacetime dimensions. Nevertheless, the growth still follows the universal pattern expected for relativistic CFTs. Additionally, a time-dependent analogue of relative entropy introduced in <span><span>[1]</span></span> is generalized to include correction from the Gauss-Bonnet parameter. We demonstrate our findings through concrete examples, including instantaneous, linear, and periodically driven quenches. We also briefly mention the evolution of mutual information.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1018 ","pages":"Article 117084"},"PeriodicalIF":2.8,"publicationDate":"2025-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144904110","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Most general exact solution for charged compact star model in extended symmetric teleparallel gravity using two step-method","authors":"Sat Paul ,&nbsp;Jitendra Kumar ,&nbsp;S.K. Maurya ,&nbsp;Akram Ali","doi":"10.1016/j.nuclphysb.2025.117088","DOIUrl":"10.1016/j.nuclphysb.2025.117088","url":null,"abstract":"<div><div>This article investigates the physical properties and stability of an isotropic compact star in <span><math><mi>F</mi><mo>(</mo><mrow><mi>Q</mi><mo>,</mo><mi>T</mi></mrow><mo>)</mo></math></span> gravity, where <span><math><mi>T</mi></math></span> denotes the trace of the energy-momentum tensor and <span><math><mi>Q</mi></math></span> represents the nonmetricity scalar. In the present study, the impact of <span><math><mi>F</mi><mo>(</mo><mrow><mi>Q</mi><mo>,</mo><mi>T</mi></mrow><mo>)</mo></math></span> gravity on the stability and structure of compact stars is investigated, considering a perfect fluid distribution and adopting the functional form <span><math><mi>F</mi><mo>(</mo><mrow><mi>Q</mi><mo>,</mo><mi>T</mi></mrow><mo>)</mo><mo>=</mo><msub><mrow><mi>ξ</mi></mrow><mrow><mn>1</mn></mrow></msub><mi>Q</mi><mo>+</mo><msub><mrow><mi>ξ</mi></mrow><mrow><mn>2</mn></mrow></msub><mi>T</mi></math></span>. The field equations are solved using the two-step method proposed by Gupta and Jasim [Astrophys. Space Sci. 283 (2003) 337], along with the Buchdahl ansatz given by <span><math><msup><mrow><mi>e</mi></mrow><mrow><mi>φ</mi></mrow></msup><mo>=</mo><mfrac><mrow><mi>ϒ</mi><mo>(</mo><mn>1</mn><mo>+</mo><mi>ϵ</mi><msup><mrow><mi>r</mi></mrow><mrow><mn>2</mn></mrow></msup><mo>)</mo></mrow><mrow><mi>ϒ</mi><mo>+</mo><mi>ϵ</mi><msup><mrow><mi>r</mi></mrow><mrow><mn>2</mn></mrow></msup></mrow></mfrac></math></span>. To investigate the physical properties of the LMC X-4 compact star, a static spherically symmetric metric is employed in the interior region, while a Reissner-Nordstrom exterior metric is adopted for the exterior region. In the interior region of the proposed stellar object, we analyze the behaviour of the spacetime metric functions (<span><math><msup><mrow><mi>e</mi></mrow><mrow><mi>φ</mi></mrow></msup></math></span> and <span><math><msup><mrow><mi>e</mi></mrow><mrow><mi>ϑ</mi></mrow></msup></math></span>), energy density (<em>ρ</em>), pressure (P), charge (q), ratio of pressure to density (Ω) and the energy conditions. The equilibrium state of the star is analysed using the Tolman-Oppenheimer-Volkoff (TOV) equation, expressed as <span><math><msub><mrow><mi>F</mi></mrow><mrow><mi>G</mi></mrow></msub><mo>+</mo><msub><mrow><mi>F</mi></mrow><mrow><mi>H</mi></mrow></msub><mo>+</mo><msub><mrow><mi>F</mi></mrow><mrow><mo>(</mo><mi>Q</mi><mo>,</mo><mi>T</mi><mo>)</mo></mrow></msub><mo>+</mo><msub><mrow><mi>F</mi></mrow><mrow><mi>Q</mi></mrow></msub><mo>=</mo><mn>0</mn></math></span>. To assess the stability of the configuration, we examine the adiabatic index (Γ), the causality condition, regularity conditions, the well-behaved condition and the stability against convection criterion.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1018 ","pages":"Article 117088"},"PeriodicalIF":2.8,"publicationDate":"2025-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144904111","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Almost general analysis of μ − τ reflection symmetry perturbed by charged leptons and its testability by DUNE and T2HK","authors":"Masaki J.S. Yang","doi":"10.1016/j.nuclphysb.2025.117092","DOIUrl":"10.1016/j.nuclphysb.2025.117092","url":null,"abstract":"<div><div>In this paper, we generally analyze the <span><math><mi>μ</mi><mo>−</mo><mi>τ</mi></math></span> reflection symmetry modified by small mixings of charged leptons and how will future experiments verify deviations from the predictions of the symmetry. As an approximation, the left-handed diagonalization <span><math><msub><mrow><mi>U</mi></mrow><mrow><mi>e</mi></mrow></msub></math></span> of charged leptons is assumed to have a similar magnitude as the CKM matrix. In other words, the 1-3 mixing is neglected and the 1-2 and 2-3 mixing are to be approximately <span><math><mi>O</mi><mo>(</mo><mn>0.1</mn><mo>)</mo></math></span>. The Dirac CP phase <em>δ</em> of the MNS matrix is evaluated in such parameter regions. As a result, deviations from the predictions <span><math><mi>sin</mi><mo>⁡</mo><msub><mrow><mi>θ</mi></mrow><mrow><mn>23</mn></mrow></msub><mo>=</mo><mi>π</mi><mo>/</mo><mn>4</mn></math></span> and <span><math><mi>δ</mi><mo>=</mo><mo>±</mo><mi>π</mi><mo>/</mo><mn>2</mn></math></span> depend on relative CP phases between <span><math><msub><mrow><mi>U</mi></mrow><mrow><mi>e</mi></mrow></msub></math></span> and diagonalization of neutrinos <span><math><msub><mrow><mi>U</mi></mrow><mrow><mi>ν</mi></mrow></msub></math></span>. While phases of the second and third generations cause only about <span><math><mo>±</mo><msup><mrow><mn>10</mn></mrow><mrow><mo>∘</mo></mrow></msup></math></span> deviations for the Dirac phase <em>δ</em>, the phase of the first generation can cause up to <span><math><mo>±</mo><msup><mrow><mn>30</mn></mrow><mrow><mo>∘</mo></mrow></msup></math></span>. This flavor dependence is distinguished to some extent by the next-generation experiments. On the other hand, if <em>δ</em> is not observed, such a scenario is excluded by about 5 years of observation.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1018 ","pages":"Article 117092"},"PeriodicalIF":2.8,"publicationDate":"2025-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144895910","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Energy momentum tensor correlators in ϕ4 theory II: The spin-two sector","authors":"Nikos Irges,&nbsp;Leonidas Karageorgos","doi":"10.1016/j.nuclphysb.2025.117090","DOIUrl":"10.1016/j.nuclphysb.2025.117090","url":null,"abstract":"<div><div>We extend the computation of the <span><math><msub><mrow><mi>C</mi></mrow><mrow><mi>T</mi></mrow></msub></math></span> charge of the 2-point function of the Energy-Momentum Tensor to 4-loops. We show that <span><math><msub><mrow><mi>C</mi></mrow><mrow><mi>T</mi></mrow></msub></math></span> decomposes into two sectors, the conformal sector, which encodes the value of the central charge at fixed points and an RG-sector that contains logarithmic and constant corrections proportional to the <em>β</em>-function. This latter constitutes the main new result of this work and is inaccessible via CFT methods alone. Furthermore, we demonstrate that <span><math><msub><mrow><mi>C</mi></mrow><mrow><mi>T</mi></mrow></msub></math></span> satisfies an eigenvalue-like equation analogous to that of the spin-0 charge, as discussed in part I, though with a different in general eigenvalue. Finally we present three possible applications.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1018 ","pages":"Article 117090"},"PeriodicalIF":2.8,"publicationDate":"2025-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144904109","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Theoretical study on holographic paramagnetism/ferromagnetism phase transition in Gauss Bonnet gravity","authors":"Ruo-Tong Wei ,&nbsp;Jia-Li Feng ,&nbsp;Guang-Zhi Xu ,&nbsp;Ya-Bo Wu ,&nbsp;Jun-Wang Lu ,&nbsp;Cheng-Yuan Zhang","doi":"10.1016/j.nuclphysb.2025.117089","DOIUrl":"10.1016/j.nuclphysb.2025.117089","url":null,"abstract":"<div><div>In this paper, under the background of four-dimensional Gauss-Bonnet gravity, the changes of the critical temperature, the magnetic moment and other physical quantities in the holographic ferromagnetic model with the Gauss-Bonnet coupling <em>α</em> are studied. Calculations show that the critical temperature decreases as the Gauss-Bonnet coupling <em>α</em> increases, and the magnetic moment is more difficult to form when there is no external magnetic field and the temperature is below the critical temperature. After applying an external magnetic field, the variation of the magnetic susceptibility density with the Gauss-Bonnet coupling <em>α</em> in the high temperature region is consistent with the Curie-Weiss law, and in the low temperature region, a single magnetic field-dominated hysteresis loop appears for different Gauss-Bonnet coupling <em>α</em>. And as the Gauss-Bonnet coupling coefficient <em>α</em> increases, the period of the hysteresis loop becomes longer.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1018 ","pages":"Article 117089"},"PeriodicalIF":2.8,"publicationDate":"2025-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144895911","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Field-theoretic construction of complexity-free anisotropic stars via extended decoupling","authors":"U. Farwa ,&nbsp;A. Abbas ,&nbsp;M. Yousaf","doi":"10.1016/j.nuclphysb.2025.117086","DOIUrl":"10.1016/j.nuclphysb.2025.117086","url":null,"abstract":"<div><div>Modified theories of gravity have offered compelling alternatives for addressing the stability and structural features of self-gravitating systems. In this work, we explore the dynamics of anisotropic compact objects within the framework of <span><math><mi>f</mi><mo>(</mo><mi>R</mi><mo>,</mo><mi>T</mi><mo>,</mo><mi>Q</mi><mo>)</mo></math></span> gravity using an extended gravitational decoupling approach. Starting with a spherically symmetric anisotropic seed solution, we incorporate an additional gravitational source and formulate the corresponding field and conservation equations under strong matter-geometry coupling. The analytical structure is developed by imposing matching and Kuchowicz conditions to determine the unknown metric functions. Furthermore, we introduce a complexity-free condition along with an isotropized constraint to analyze the influence of coupling effects on the physical viability and stability of the system. Our results indicate that the matter-curvature interaction significantly enhances the stable configurations and reduces the overall complexity of the system. The impact of the decoupling parameter is also studied to illustrate the sensitivity of physical parameters, supported through graphical analysis. These findings provide deeper insight into the role of extended gravity and anisotropic effects in the formation and evolution of compact stellar objects.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1018 ","pages":"Article 117086"},"PeriodicalIF":2.8,"publicationDate":"2025-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144895912","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Vogel's universality and Macdonald dimensions","authors":"Liudmila Bishler","doi":"10.1016/j.nuclphysb.2025.117085","DOIUrl":"10.1016/j.nuclphysb.2025.117085","url":null,"abstract":"<div><div>We discuss algebraic universality in the sense of P. Vogel for the simplest refined quantity, the Macdonald dimensions. The main known source of universal quantities is given by Chern-Simons theory. Refinement of Chern-Simons theory means introducing additional parameters. At the level of symmetric functions, the refinement is the transition from the Schur functions to the Macdonald polynomials. We consider the Macdonald polynomials associated with the simple Lie algebras, define Macdonald dimensions and dual Macdonald dimensions, and present a universal formula for them that unifies these quantities for algebras associated with simply laced root systems. We also consider mixed Macdonald dimensions that depend on two different root systems.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1018 ","pages":"Article 117085"},"PeriodicalIF":2.8,"publicationDate":"2025-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144886935","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}