Nuclear Physics B最新文献

{"title":"Concurrent exploration of Axion-like particle interactions with gauge bosons at the LHC","authors":"Shirin Chenarani ,&nbsp;Mojtaba Mohammadi Najafabadi","doi":"10.1016/j.nuclphysb.2025.116969","DOIUrl":"10.1016/j.nuclphysb.2025.116969","url":null,"abstract":"<div><div>Axion-like particles (ALPs) are pseudo Nambu-Goldstone bosons associated with spontaneously broken global symmetries incorporated in the Standard Model (SM) Lagrangian in many models beyond the SM. The existence of a light ALP is plausible due to the long-standing problems that the SM has not been able to address, such as the dark matter (DM) problem and the observed matter-antimatter asymmetry. There are many proposals in recent decades considering the ALP as a solution to some of these shortcomings. Motivated by such potential, we search for ALPs with a mass of 1 MeV at the LHC in a model-independent fashion. We explore two complementary production modes: ALP production in association with a pair of electroweak gauge bosons (<em>ZZ</em> or <em>WW</em>) and ALP production in association with a single gauge boson (<em>W</em> or <em>Z</em>) plus jets. For the <span><math><mi>V</mi><mi>V</mi><mo>+</mo><mi>a</mi></math></span> final state, signal and dominant SM backgrounds are generated, and a realistic detector response simulation is performed. A multivariate analysis is employed to discriminate the <span><math><mi>V</mi><mi>V</mi><mo>+</mo><mi>a</mi></math></span> signal from background processes, and the expected 95% confidence level (CL) exclusion limits in two-dimensional parameter spaces involving the ALP couplings are subsequently derived. The <em>V</em>+jets channel is interpreted using LHC measurements in regimes where the ALP escapes detection, appearing as missing energy. The two analyses are complementary: both the <span><math><mi>V</mi><mi>V</mi><mo>+</mo><mi>a</mi></math></span> and the <em>V</em>+jets channels probe simultaneously the ALP couplings to gluons and to electroweak gauge bosons. While the <span><math><mi>V</mi><mi>V</mi><mo>+</mo><mi>a</mi></math></span> channel offers clean multi-lepton final states and direct reconstruction of the <em>ZZ</em> or <em>WW</em> system, the <em>V</em>+jets channel benefits from larger production cross sections, enabling stronger constraints in certain regions of the parameter space. Comparing the limits obtained in this study with current and projected limits derived from LHC searches, it is seen that competitive sensitivities to the ALP couplings are achieved, and a significant region of previously unexplored parameter space becomes accessible.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1018 ","pages":"Article 116969"},"PeriodicalIF":2.5,"publicationDate":"2025-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144195196","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":"What is the Hierarchy Problem?","authors":"Michael E. Peskin","doi":"10.1016/j.nuclphysb.2025.116971","DOIUrl":"10.1016/j.nuclphysb.2025.116971","url":null,"abstract":"<div><div>Is there a Hierarchy Problem? If so, what, exactly, is the problem? Almost every theorist has a personal answer to these questions. In this article, I give my answer. I will explain that the Hierarchy Problem is not a formal problem but rather our ignorance of a crucial physics explanation – the explanation of the nature of the Higgs boson. Without the solution to this problem, we cannot make progress on the major questions of our field.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1018 ","pages":"Article 116971"},"PeriodicalIF":2.5,"publicationDate":"2025-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144195294","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":"Quasinormal modes of hairy black holes with mixed couplings","authors":"Yuling Weng,&nbsp;Yanqiang Liu,&nbsp;Yang Cao,&nbsp;Jun Tao","doi":"10.1016/j.nuclphysb.2025.116973","DOIUrl":"10.1016/j.nuclphysb.2025.116973","url":null,"abstract":"<div><div>In this paper, we study a mixed coupling function incorporating spontaneous and non-linear scalarization of the hairy black hole in the Einstein-Maxwell-scalar model. Recent researches have demonstrated that a series of hairy black holes exhibit multiple photon spheres outside the horizon. Compared to the spontaneous solution, the mixed coupling function leads to a smaller event horizon radius. Quasinormal modes describe the fundamental signal of the gravitational waves in the ringdown stage, providing an effective method for detection. The real part of quasinormal modes grows with the azimuthal quantum number, suggesting the positive correlation between quasinormal modes and the angular velocity of trajectories. Furthermore, the absolute value of quasinormal frequencies' imaginary part is connected to the Lyapunov exponents of the corresponding photon spheres. The result of quasinormal modes calculated by the WKB approximation indicates long-lived and sub-long-lived modes, which are associated with the stable and the outer unstable photon spheres.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1017 ","pages":"Article 116973"},"PeriodicalIF":2.5,"publicationDate":"2025-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144189387","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":"Generalized Brans-Dicke theory from Verlinde's entropic gravity","authors":"Salih Kibaroğlu ,&nbsp;Mustafa Senay","doi":"10.1016/j.nuclphysb.2025.116974","DOIUrl":"10.1016/j.nuclphysb.2025.116974","url":null,"abstract":"<div><div>In this work, we develop a <em>q</em>-deformed scalar-tensor theory of gravitation by combining Verlinde's entropic gravity paradigm with statistical deformation effects. The resulting model modifies the Brans-Dicke framework through a deformation function, treated as a constant rescaling factor for the effective gravitational coupling. We derive the corresponding <em>q</em>-deformed field equations and analyze their theoretical consistency including the recovery of standard gravitational models in specific limits. While the present formulation preserves key symmetries and provides a generalized description of gravitational dynamics, it does not yield a significant deviation from Brans-Dicke theory. The study concludes with prospects for future research, including the exploration of cosmological solutions arising from the <em>q</em>-deformed field equations.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1017 ","pages":"Article 116974"},"PeriodicalIF":2.5,"publicationDate":"2025-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144194783","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":"Finite temperature QCD crossover at non-zero chemical potential: A Dyson–Schwinger approach","authors":"Arpan Chatterjee ,&nbsp;Marco Frasca ,&nbsp;Anish Ghoshal ,&nbsp;Stefan Groote","doi":"10.1016/j.nuclphysb.2025.116972","DOIUrl":"10.1016/j.nuclphysb.2025.116972","url":null,"abstract":"<div><div>We study QCD at finite temperature and non-zero chemical potential to derive the critical temperature at the chiral phase transition (crossover). We solve a set of Dyson–Schwinger partial differential equations using the exact solution for the Yang–Mills quantum field theory based on elliptical functions. We derive a Nambu-Jona–Lasino (NJL) model of the quarks and obtain a very good agreement with recent lattice computations regarding the dependence of the critical temperature on the strong coupling scale. The solution depends on a single scale parameter, as typical for the theory and already known from studies about asymptotic freedom. The study is analytically derived from QCD.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1017 ","pages":"Article 116972"},"PeriodicalIF":2.5,"publicationDate":"2025-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144189388","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":"Wormhole thermodynamics in matter-geometry coupled theory: Implications of pseudo-isothermal profile and complexity factor","authors":"Tayyab Naseer ,&nbsp;M. Sharif ,&nbsp;Mona Faiza ,&nbsp;Faisal Javed ,&nbsp;Baiju Dayanandan ,&nbsp;Khalifa Al Shaqsi","doi":"10.1016/j.nuclphysb.2025.116970","DOIUrl":"10.1016/j.nuclphysb.2025.116970","url":null,"abstract":"<div><div>The objective of this article is to explore the existence of traversable wormholes possessing the pseudo-isothermal profile in modified <span><math><mi>f</mi><mo>(</mo><mi>R</mi><mo>,</mo><mi>T</mi><mo>)</mo></math></span> gravity. We utilize the Morris-Thorne spacetime to define the wormhole structure and develop anisotropic gravitational equations for a linear modified gravity model. Our analysis involves deriving the shape functions by taking into account both constant and variable redshift functions. These shape functions adhere to the required conditions and create a connection between two asymptotically flat regions of spacetime. For each of the two cases, we analyze energy conditions whose satisfaction ensures the existence of wormholes without the necessity for exotic matter. Furthermore, we evaluate the active gravitational mass, complexity factor and volume integral quantifier for the proposed solutions. It is revealed that all these quantities gain positive value at the wormhole's throat. Afterwards, a detailed stability analysis of the developed models is performed through certain criteria. We also analyze the thermodynamic behavior, focusing on the variation of entropy and its implications for the wormhole geometry. Our findings suggest that the pseudo-isothermal wormhole geometry exists in the context of the considered matter-geometry coupled modified theory.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1017 ","pages":"Article 116970"},"PeriodicalIF":2.5,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144170416","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":"Physical ageing from generalised time-translation-invariance","authors":"Malte Henkel","doi":"10.1016/j.nuclphysb.2025.116968","DOIUrl":"10.1016/j.nuclphysb.2025.116968","url":null,"abstract":"<div><div>A generalised form of time-translation-invariance permits to re-derive the known generic phenomenology of ageing, which arises in classical many-body systems after a quench from an initially disordered system to a temperature <span><math><mi>T</mi><mo>≤</mo><msub><mrow><mi>T</mi></mrow><mrow><mi>c</mi></mrow></msub></math></span>, at or below the critical temperature <span><math><msub><mrow><mi>T</mi></mrow><mrow><mi>c</mi></mrow></msub></math></span>. Generalised time-translation-invariance is obtained, out of equilibrium, from a change of representation of the Lie algebra generators of the dynamical symmetries of scale-invariance and time-translation-invariance. Observable consequences include the algebraic form of the scaling functions for large arguments of the two-time auto-correlators and auto-responses, the equality of the auto-correlation and the auto-response exponents <span><math><msub><mrow><mi>λ</mi></mrow><mrow><mi>C</mi></mrow></msub><mo>=</mo><msub><mrow><mi>λ</mi></mrow><mrow><mi>R</mi></mrow></msub></math></span>, the cross-over scaling form for an initially magnetised critical system and the explanation of a novel finite-size scaling if the auto-correlator or auto-response converge for large arguments <span><math><mi>y</mi><mo>=</mo><mi>t</mi><mo>/</mo><mi>s</mi><mo>≫</mo><mn>1</mn></math></span> to a plateau. For global two-time correlators, the time-dependence involving the initial critical slip exponent Θ is confirmed and is generalised to all temperatures below criticality and to the global two-time response function, and their finite-size scaling is derived as well. This also includes the time-dependence of the squared global order-parameter. The celebrate Janssen-Schaub-Schmittmann scaling relation with the auto-correlation exponent is thereby extended to all temperatures below the critical temperature. A simple criterion on the relevance of non-linear terms in the stochastic equation of motion is derived, taking the dimensionality of couplings into account. Its applicability in a wide class of models is confirmed, for temperatures <span><math><mi>T</mi><mo>≤</mo><msub><mrow><mi>T</mi></mrow><mrow><mi>c</mi></mrow></msub></math></span>. Relevance to experiments is also discussed.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1017 ","pages":"Article 116968"},"PeriodicalIF":2.5,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144147620","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":"Coupling constant metamorphosis, Fermat principle and light propagation in Kerr metric","authors":"Joanna Piwnik,&nbsp;Cezary Gonera,&nbsp;Joanna Gonera,&nbsp;Piotr Kosiński","doi":"10.1016/j.nuclphysb.2025.116967","DOIUrl":"10.1016/j.nuclphysb.2025.116967","url":null,"abstract":"<div><div>The geodesics of Kerr's metric are described by the four-dimensional Hamiltonian dynamics integrable in the Arnold-Liouville sense. It can be reduced to two-dimensional one by the use of Fermat's principle. The resulting Hamiltonian is, however, rather complicated. We show how one can apply the coupling constant metamorphosis to simplify the Hamiltonian to the one quadratic in momenta and depending on the initial “energy” as parameter. It describes a simple dynamics of two non-linear oscillators and can be integrated directly or evaluated in the framework of perturbation theory by adopting the elegant Lindstedt–Poincaré algorithm. The idea of coupling constant metamorphosis is also applied to the Myers–Perry metric — a five dimensional generalization of Kerr's metric. The case of single rotation parameter is considered in some detail.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1017 ","pages":"Article 116967"},"PeriodicalIF":2.5,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144147619","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":"Einstein–Gauss–Bonnet–Myrzakulov gravity from R + F(T,G): Numerical insights and torsion–Gauss–Bonnet dynamics in Weitzenböck spacetime","authors":"Davood Momeni ,&nbsp;Ratbay Myrzakulov","doi":"10.1016/j.nuclphysb.2025.116966","DOIUrl":"10.1016/j.nuclphysb.2025.116966","url":null,"abstract":"<div><div>The study of modified gravity models has garnered significant attention because of their potential to provide alternative explanations for cosmological phenomena, such as the accelerated expansion of the universe and the nature of dark energy. One such model, the Einstein–Gauss–Bonnet–Myrzakulov <span><math><mi>R</mi><mo>+</mo><mi>F</mi><mo>(</mo><mi>T</mi><mo>,</mo><mi>G</mi><mo>)</mo></math></span> gravity (EGBMG), which incorporates the curvature <em>R</em>, torsion <em>T</em>, and the Gauss-Bonnet term <em>G</em>, offers a promising framework to explore the dynamics of the universe and its evolution. This paper delves into the theoretical and observational implications of the EGBMG model, focusing on its ability to address long-standing challenges in cosmology, including the evolution of dark energy and the transition from early-time inflationary behavior to late-time acceleration. We review recent advancements in the model, including its compatibility with observational data and its ability to provide new insights into cosmic acceleration. Through a combination of theoretical models, dynamical systems analysis, and cosmological diagnostics, we demonstrate the robustness of the EGBMG framework in explaining the large-scale structure of the universe and its accelerated expansion. This paper serves as a step toward further exploring the potential of this model to understand the fundamental forces driving the cosmos and its consistency with modern observational constraints in Weitzenböck spacetime.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1017 ","pages":"Article 116966"},"PeriodicalIF":2.5,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144124611","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":"Periodic Motzkin chain: Ground states and symmetries","authors":"Andrei G. Pronko","doi":"10.1016/j.nuclphysb.2025.116963","DOIUrl":"10.1016/j.nuclphysb.2025.116963","url":null,"abstract":"<div><div>Motzkin chain is a model of nearest-neighbor interacting quantum <span><math><mi>s</mi><mo>=</mo><mn>1</mn></math></span> spins with open boundary conditions. It is known that it has a unique ground state which can be viewed as a sum of Motzkin paths. We consider the case of periodic boundary conditions and provide several conjectures about structure of the ground state space and symmetries of the Hamiltonian. We conjecture that the ground state is degenerate and independent states are distinguished by eigenvalues of the third component of total spin operator. Each of these states can be described as a sum of paths, similar to the Motzkin paths. Moreover, there exist two operators commuting with the Hamiltonian, which play the roles of lowering and raising operators when acting at these states. We conjecture also that these operators generate a <em>C</em>-type Lie algebra, with rank equal to the number of sites. The symmetry algebra of the Hamiltonian is actually wider, and extended, besides the cyclic shift operator, by a central element contained in the third component of total spin operator.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1017 ","pages":"Article 116963"},"PeriodicalIF":2.5,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144124612","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}