Nuclear Physics B最新文献

{"title":"Renormalization group analysis of a continuous model with self-organized criticality: Effects of randomly moving environment","authors":"N.V. Antonov ,&nbsp;P.I. Kakin ,&nbsp;N.M. Lebedev ,&nbsp;A.Yu. Luchin","doi":"10.1016/j.nuclphysb.2025.117035","DOIUrl":"10.1016/j.nuclphysb.2025.117035","url":null,"abstract":"<div><div>We study a strongly anisotropic self-organized critical system coupled to an isotropic random fluid environment. The former is described by a continuous (coarse-grained) model due to Hwa and Kardar. The latter is modelled by the Navier—Stokes equation with a random stirring force of a rather general form that includes, in particular, the overall shaking of the system and a non-local part with power-law spectrum <span><math><mo>∼</mo><msup><mrow><mi>k</mi></mrow><mrow><mn>4</mn><mo>−</mo><mi>d</mi><mo>−</mo><mi>y</mi></mrow></msup></math></span> that describes, in the limiting case <span><math><mi>y</mi><mo>→</mo><mn>4</mn></math></span>, a turbulent fluid. The full problem of the two coupled stochastic equations is represented as a field theoretic model which is shown to be multiplicatively renormalizable and logarithmic at <span><math><mi>d</mi><mo>=</mo><mn>4</mn></math></span>. Due to the interplay between isotropic and anisotropic interactions, the corresponding renormalization group (RG) equations reveal a rich pattern of possible infrared (large scales, long times) regimes of asymptotic behaviour of various Green's functions. The attractors of the RG equations in the five-dimensional space of coupling parameters include a two-dimensional surface of Gaussian (free) fixed points, a single fixed point that corresponds to the plain advection by the turbulent fluid (the Hwa–Kardar self-interaction is irrelevant) and a one-dimensional curve of fixed points that corresponds to the case where the Hwa–Kardar nonlinearity and the uniform stirring are simultaneously relevant. The character of attractiveness is determined by the exponent <em>y</em> and the dimension of space <em>d</em>; the most interesting case <span><math><mi>d</mi><mo>=</mo><mn>3</mn></math></span> and <span><math><mi>y</mi><mo>→</mo><mn>4</mn></math></span> is described by the single fixed point. The corresponding critical dimensions of the frequency and the basic fields are found exactly.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1018 ","pages":"Article 117035"},"PeriodicalIF":2.5,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144686721","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":"Mono-lepton signature of a neutrino-philic dark fermion at hadron colliders","authors":"Kai Ma ,&nbsp;Lin-Yun He","doi":"10.1016/j.nuclphysb.2025.117028","DOIUrl":"10.1016/j.nuclphysb.2025.117028","url":null,"abstract":"<div><div>Searching for dark matter at high-energy colliders and direct detection experiments can effectively cover nearly the entire mass range from the MeV to the TeV scale. In this paper, we focus on four-fermion contact interactions formulated within the framework of Effective Field Theory. Specifically, we present a detailed analysis of mono-lepton production at the LHC. Our results demonstrate that tensor operators exhibit superior sensitivity in the mono-lepton channel, constraining energy scales up to 3 TeV for a nearly massless dark fermion using current LHC data. Moreover, these operators mediate both spin-independent and spin-dependent absorption processes in nuclear targets. A systematic comparison of constraints between direct detection experiments and collider measurements reveals the LHC's distinct advantage in exploring sub-GeV dark matter candidates while maintaining competitive sensitivity at the TeV scale. Notably, direct detection experiments such as Super-Kamiokande and Borexino achieve complementary constraints in the 10-100 MeV mass range through their unique capabilities: utilization of light nuclei targets, large exposure volumes, and distinctive features of the recoil energy spectra.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1018 ","pages":"Article 117028"},"PeriodicalIF":2.5,"publicationDate":"2025-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144686720","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":"Constraining scalars of 16H through proton decays in non-renormalisable SO(10) models","authors":"Saurabh K. Shukla","doi":"10.1016/j.nuclphysb.2025.117034","DOIUrl":"10.1016/j.nuclphysb.2025.117034","url":null,"abstract":"&lt;div&gt;&lt;div&gt;Non-renormalisable versions of &lt;span&gt;&lt;math&gt;&lt;mi&gt;S&lt;/mi&gt;&lt;mi&gt;O&lt;/mi&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mn&gt;10&lt;/mn&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/math&gt;&lt;/span&gt; based on irreducible representations with lesser degrees of freedom, are free of running into the catastrophe of non-perturbativity of standard model gauge couplings in contrast to the renormalisable versions having tensors with many degrees of freedom. &lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mn&gt;16&lt;/mn&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;H&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt; is the smallest representation, participates in Yukawa Lagrangian at the non-renormalisable level, contributing to the charged and neutral fermion masses, and has six distinct scalars with different &lt;span&gt;&lt;math&gt;&lt;mi&gt;B&lt;/mi&gt;&lt;mo&gt;−&lt;/mo&gt;&lt;mi&gt;L&lt;/mi&gt;&lt;/math&gt;&lt;/span&gt; charges. We computed the leptoquark and diquark couplings of different pairs of scalars stemming from all possible decomposition of the term resulting from the coupling of &lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mn&gt;16&lt;/mn&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;H&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt; with the &lt;strong&gt;16&lt;/strong&gt; dimensional fermion multiplet of &lt;span&gt;&lt;math&gt;&lt;mi&gt;S&lt;/mi&gt;&lt;mi&gt;O&lt;/mi&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mn&gt;10&lt;/mn&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/math&gt;&lt;/span&gt;, i.e. &lt;span&gt;&lt;math&gt;&lt;mfrac&gt;&lt;mrow&gt;&lt;mn&gt;16&lt;/mn&gt;&lt;mspace&gt;&lt;/mspace&gt;&lt;mn&gt;16&lt;/mn&gt;&lt;mspace&gt;&lt;/mspace&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mn&gt;16&lt;/mn&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;H&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;mspace&gt;&lt;/mspace&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mn&gt;16&lt;/mn&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;H&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;Λ&lt;/mi&gt;&lt;/mrow&gt;&lt;/mfrac&gt;&lt;/math&gt;&lt;/span&gt;. Computing the tree and loop level contribution of different pairs to the effective dimension six, &lt;span&gt;&lt;math&gt;&lt;mi&gt;B&lt;/mi&gt;&lt;mo&gt;−&lt;/mo&gt;&lt;mi&gt;L&lt;/mi&gt;&lt;/math&gt;&lt;/span&gt; conserving operators, it turns out only three pairs, viz &lt;span&gt;&lt;math&gt;&lt;mi&gt;σ&lt;/mi&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;mo&gt;,&lt;/mo&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;mo&gt;,&lt;/mo&gt;&lt;mn&gt;0&lt;/mn&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;mo&gt;−&lt;/mo&gt;&lt;mi&gt;T&lt;/mi&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mn&gt;3&lt;/mn&gt;&lt;mo&gt;,&lt;/mo&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;mo&gt;,&lt;/mo&gt;&lt;mfrac&gt;&lt;mrow&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;3&lt;/mn&gt;&lt;/mrow&gt;&lt;/mfrac&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/math&gt;&lt;/span&gt;, and &lt;span&gt;&lt;math&gt;&lt;mi&gt;H&lt;/mi&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;mo&gt;,&lt;/mo&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;mo&gt;,&lt;/mo&gt;&lt;mo&gt;−&lt;/mo&gt;&lt;mfrac&gt;&lt;mrow&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/mrow&gt;&lt;/mfrac&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;mo&gt;−&lt;/mo&gt;&lt;mi&gt;Δ&lt;/mi&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mn&gt;3&lt;/mn&gt;&lt;mo&gt;,&lt;/mo&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;mo&gt;,&lt;/mo&gt;&lt;mfrac&gt;&lt;mrow&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;6&lt;/mn&gt;&lt;/mrow&gt;&lt;/mfrac&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/math&gt;&lt;/span&gt;, and &lt;span&gt;&lt;math&gt;&lt;mi&gt;H&lt;/mi&gt;&lt;mo&gt;−&lt;/mo&gt;&lt;mi&gt;T&lt;/mi&gt;&lt;/math&gt;&lt;/span&gt; can induce proton decay at tree level. Assuming that the Yukawa couplings of the &lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mn&gt;16&lt;/mn&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;H&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt; are comparable to those of the &lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mover&gt;&lt;mrow&gt;&lt;mn&gt;126&lt;/mn&gt;&lt;/mrow&gt;&lt;mo&gt;‾&lt;/mo&gt;&lt;/mover&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;H&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt; of a realistic &lt;span&gt;&lt;math&gt;&lt;mi&gt;S&lt;/mi&gt;&lt;mi&gt;O&lt;/mi&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mn&gt;10&lt;/mn&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/math&gt;&lt;/span&gt; model and setting the cutoff scale to the Planck scale typically constrains the &lt;span&gt;&lt;math&gt;&lt;mi&gt;B&lt;/mi&gt;&lt;mo&gt;−&lt;/mo&gt;&lt;mi&gt;L&lt;/mi&gt;&lt;/math&gt;&lt;/span&gt; breaking scale to be &lt;span&gt;&lt;math&gt;&lt;mn&gt;4&lt;/mn&gt;&lt;mo&gt;∼&lt;/mo&gt;&lt;mn&gt;5&lt;/mn&gt;&lt;/math&gt;&lt;/span&gt; orders of magnitude less than the cutoff scale (Λ). Moreover, analysing the branching pattern of the leading two-body decay modes of the p","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1018 ","pages":"Article 117034"},"PeriodicalIF":2.5,"publicationDate":"2025-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144654730","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":"Phase transitions, shadows, and microstructure of Kerr-Anti-de Sitter Black Holes from geometrothermodynamics","authors":"Jose Miguel Ladino ,&nbsp;Carlos E. Romero-Figueroa ,&nbsp;Hernando Quevedo","doi":"10.1016/j.nuclphysb.2025.117031","DOIUrl":"10.1016/j.nuclphysb.2025.117031","url":null,"abstract":"<div><div>Using the formalism of geometrothermodynamics, we investigate the phase-transition structure and microstructure of the Kerr-Anti-de Sitter black hole and show the relationship with its shadow structure. By treating the curvature radius as a thermodynamic variable, we ensure scaling consistency and model the system as quasi-homogeneous. In the canonical ensemble, we identify critical points and characterize both first- and second-order phase transitions independently of pressure. In the grand-canonical ensemble, we reveal a distinct phase structure, including the Hawking-Page transition. We derive analytical expressions for the Kerr-Anti-de Sitter black hole shadow and its critical parameters, using shadow thermodynamics to construct asymmetric shadow profiles that capture the phase-transition structure. Finally, we show that the singularities of the geometrothermodynamic curvature in the shadow align with divergences in thermodynamic response functions, confirming the correspondence between shadows, phase transitions, and microstructure.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1018 ","pages":"Article 117031"},"PeriodicalIF":2.5,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144694338","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":"Constraining Big Bang nucleosynthesis in f(T,B,TG,BG) gravity","authors":"Abdul Malik Sultan ,&nbsp;Manahil Ali ,&nbsp;Shamaila Rani ,&nbsp;Nadeem Azhar ,&nbsp;N. Myrzakulov ,&nbsp;Sanjar Shaymatov","doi":"10.1016/j.nuclphysb.2025.117023","DOIUrl":"10.1016/j.nuclphysb.2025.117023","url":null,"abstract":"<div><div>Big Bang nucleosynthes describes a significant process in the early universe, responsible for the formation of light nuclei a while after the Big Bang explosion. Its sensitivity to the expansion rate makes BBN an effective probe for testing deviations from standard cosmology, particularly within the framework of modified theories of gravity. In this article, we investigate the evolution of the Universe through Big Bang nucleosynthesis within the framework of <span><math><mi>f</mi><mo>(</mo><mi>T</mi><mo>,</mo><mspace></mspace><mi>B</mi><mo>,</mo><mspace></mspace><msub><mrow><mi>T</mi></mrow><mrow><mi>G</mi></mrow></msub><mo>,</mo><mspace></mspace><msub><mrow><mi>B</mi></mrow><mrow><mi>G</mi></mrow></msub><mo>)</mo></math></span> gravity. Here, <span><math><mi>T</mi><mo>,</mo><mspace></mspace><mi>B</mi><mo>,</mo><mspace></mspace><msub><mrow><mi>T</mi></mrow><mrow><mi>G</mi></mrow></msub></math></span> and <span><math><msub><mrow><mi>B</mi></mrow><mrow><mi>G</mi></mrow></msub></math></span> correspond to the torsion, boundary term, teleparallel Gauss-Bonnet term, and Gauss-Bonnet boundary term, respectively. To explore the deviation from the teleparallel equivalent of general relativity, we apply the transformation <span><math><mi>f</mi><mo>(</mo><mi>T</mi><mo>,</mo><mspace></mspace><mi>B</mi><mo>,</mo><mspace></mspace><msub><mrow><mi>T</mi></mrow><mrow><mi>G</mi></mrow></msub><mo>,</mo><mspace></mspace><msub><mrow><mi>B</mi></mrow><mrow><mi>G</mi></mrow></msub><mo>)</mo></math></span> = <span><math><mo>−</mo><mi>T</mi><mo>+</mo><mi>F</mi><mo>(</mo><mi>T</mi><mo>,</mo><mspace></mspace><mi>B</mi><mo>,</mo><mspace></mspace><msub><mrow><mi>T</mi></mrow><mrow><mi>G</mi></mrow></msub><mo>,</mo><mspace></mspace><msub><mrow><mi>B</mi></mrow><mrow><mi>G</mi></mrow></msub><mo>)</mo></math></span>. For an in-depth analysis of the Big Bang nucleosynthesis, we choose five distinct models from gravity and compared the results with the observational limits on <span><math><mo>|</mo><mfrac><mrow><mi>Δ</mi><msub><mrow><mi>T</mi></mrow><mrow><mi>f</mi></mrow></msub></mrow><mrow><msub><mrow><mi>T</mi></mrow><mrow><mi>f</mi></mrow></msub></mrow></mfrac><mo>|</mo></math></span> to examine restrictions on the free parameters associated with these models. Our outcomes indicate that <span><math><mi>f</mi><mo>(</mo><mi>T</mi><mo>,</mo><mspace></mspace><mi>B</mi><mo>,</mo><mspace></mspace><msub><mrow><mi>T</mi></mrow><mrow><mi>G</mi></mrow></msub><mo>,</mo><mspace></mspace><msub><mrow><mi>B</mi></mrow><mrow><mi>G</mi></mrow></msub><mo>)</mo></math></span> gravity can agree with the constraint of big bang nucleosynthesis, and hence build a valid view of the universe. Moreover, we take the limiting cases of the assumed theory, that is, <span><math><mi>f</mi><mo>(</mo><mi>T</mi><mo>,</mo><mi>B</mi><mo>)</mo></math></span> and <span><math><mi>f</mi><mo>(</mo><mi>T</mi><mo>)</mo></math></span> theories, which also ensure consistency with BBN data.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1018 ","pages":"Article 117023"},"PeriodicalIF":2.5,"publicationDate":"2025-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144680492","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":"Inverse see-saw mechanism with S3 flavor symmetry","authors":"Juan Carlos Gómez-Izquierdo ,&nbsp;Catalina Espinoza ,&nbsp;Lucia E. Gutiérrez Luna ,&nbsp;Myriam Mondragón","doi":"10.1016/j.nuclphysb.2025.117027","DOIUrl":"10.1016/j.nuclphysb.2025.117027","url":null,"abstract":"<div><div>The current neutrino experiments provide an opportunity for testing the inverse see-saw mechanism through charged lepton flavor violating processes and neutrinoless double beta decay. Motivated by this, in this paper we study the <span><math><msub><mrow><mi>S</mi></mrow><mrow><mn>3</mn></mrow></msub><mo>⊗</mo><msub><mrow><mi>Z</mi></mrow><mrow><mn>2</mn></mrow></msub></math></span> discrete symmetry in the <span><math><mi>B</mi><mo>−</mo><mi>L</mi></math></span> gauge model where the active light neutrino mass matrix comes from the aforementioned mechanism. In this framework, the effect of complex vacuum expectation values of the Higgs doublets on the fermion masses is explored and, under certain assumptions on the Yukawa couplings, we find that the neutrino mixing is controlled by the Cobimaximal pattern, but a sizeable deviation from the charged lepton sector breaks the well known predictions on the atmospheric angle (<span><math><msup><mrow><mn>45</mn></mrow><mrow><mo>∘</mo></mrow></msup></math></span>) and the Dirac CP-violating phase (<span><math><mo>−</mo><msup><mrow><mn>90</mn></mrow><mrow><mo>∘</mo></mrow></msup></math></span>). In addition, due to the presence of heavy neutrinos at the TeV scale, charged lepton flavor violation (CLFV) and neutrinoless double beta decay get notable contributions. Analytical formulae for these observables are obtained, and then a numerical calculation allows us to fit quite well the lepton mixing for the normal and inverted hierarchies, however, the branching ratios decay values for CLFV disfavor the latter one. Along with this, the region of parameter space for the <span><math><msub><mrow><mi>m</mi></mrow><mrow><mi>e</mi><mi>e</mi></mrow></msub></math></span> effective neutrino mass lies below the GERDA bounds for both the normal and inverted hierarchies. On the other hand, with a particular benchmark, the quark mass matrices are found to have textures that allow us to fit with great accuracy the CKM mixing matrix.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1018 ","pages":"Article 117027"},"PeriodicalIF":2.5,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144654205","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":"A 95 GeV Higgs boson in the U(1)XSSM","authors":"Song Gao ,&nbsp;Shu-Min Zhao ,&nbsp;Shuang Di ,&nbsp;Xing-Xing Dong ,&nbsp;Tai-Fu Feng","doi":"10.1016/j.nuclphysb.2025.117026","DOIUrl":"10.1016/j.nuclphysb.2025.117026","url":null,"abstract":"<div><div>The CMS and ATLAS Collaborations have recently reported their findings based on the comprehensive run 2 dataset, detailing their searches for a light Higgs boson with a mass of approximately 95 GeV. We investigate the excesses observed in the <em>γγ</em> and <span><math><mi>b</mi><mover><mrow><mi>b</mi></mrow><mrow><mo>¯</mo></mrow></mover></math></span> data at approximately 95 GeV in the <span><math><mi>U</mi><msub><mrow><mo>(</mo><mn>1</mn><mo>)</mo></mrow><mrow><mi>X</mi></mrow></msub></math></span> extension of the minimal supersymmetric standard model (<span><math><mi>U</mi><msub><mrow><mo>(</mo><mn>1</mn><mo>)</mo></mrow><mrow><mi>X</mi></mrow></msub></math></span>SSM). Additionally, it also mixes with the SM-like Higgs boson. Research indicates that, in this model, identifying the mixture of the singlet Higgs states as the lightest Higgs boson holds tremendous potential for explaining the excess observed at approximately 95 GeV. In our calculations, we maintain the masses of the lightest and next-to-lightest Higgs bosons at approximately 95 GeV and 125 GeV, respectively. The study finds that the theoretical predictions for the signal strengths <span><math><mi>μ</mi><msub><mrow><mo>(</mo><msub><mrow><mi>h</mi></mrow><mrow><mn>95</mn></mrow></msub><mo>)</mo></mrow><mrow><mi>γ</mi><mi>γ</mi></mrow></msub></math></span> and <span><math><mi>μ</mi><msub><mrow><mo>(</mo><msub><mrow><mi>h</mi></mrow><mrow><mn>95</mn></mrow></msub><mo>)</mo></mrow><mrow><mi>b</mi><mover><mrow><mi>b</mi></mrow><mrow><mo>¯</mo></mrow></mover></mrow></msub></math></span> in the <span><math><mi>U</mi><msub><mrow><mo>(</mo><mn>1</mn><mo>)</mo></mrow><mrow><mi>X</mi></mrow></msub></math></span>SSM align well with the excesses observed by CMS.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1018 ","pages":"Article 117026"},"PeriodicalIF":2.5,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144654727","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":"Parameter estimation of Barrow Agegraphic and New Barrow Agegraphic Dark Energy models in fractal universe: Correspondence with scalar field models","authors":"Anamika Kotal,&nbsp;Alok Sardar,&nbsp;Arijit Malakar,&nbsp;Ujjal Debnath","doi":"10.1016/j.nuclphysb.2025.117024","DOIUrl":"10.1016/j.nuclphysb.2025.117024","url":null,"abstract":"<div><div>In this work, we explore the Barrow Agegraphic Dark Energy (BADE) and New Barrow Agegraphic Dark Energy (NBADE) models within the framework of a fractal universe, incorporating Barrow entropy and the holographic principle with a time scale as the infrared (IR) cut-off. By analyzing both conformal time and the universe's age as IR cutoffs, we investigate the cosmological implications of these dark energy models and examine the evolution of a universe filled with the proposed dark energy components alongside pressureless matter. Using BAO and <span><math><mi>P</mi><mi>a</mi><mi>n</mi><mi>t</mi><mi>h</mi><mi>e</mi><mi>o</mi><msup><mrow><mi>n</mi></mrow><mrow><mo>+</mo></mrow></msup></math></span> datasets, we constrain the model parameters and plot the Hubble parameter and distance modulus for both datasets. The results align well with current observations and demonstrate excellent agreement with the ΛCDM model. Additionally, we extract various cosmological parameters and assess the stability of the BADE and NBADE models through squared sound speed analysis. We study the <span><math><msub><mrow><mi>ω</mi></mrow><mrow><mi>d</mi></mrow></msub><mo>−</mo><msubsup><mrow><mi>ω</mi></mrow><mrow><mi>d</mi></mrow><mrow><mo>′</mo></mrow></msubsup></math></span> analysis of the BADE and NBADE models and the statefinder diagnostic for both models in the <span><math><mi>q</mi><mo>−</mo><mtext>S</mtext></math></span> and <span><math><mi>q</mi><mo>−</mo><mi>r</mi></math></span> planes. Also, we studied the energy conditions, evaluated our models through the framework of thermodynamics, and analyzed their thermal stability. Furthermore, in a dedicated section, we investigate the impact of introducing an interaction term between dark energy and dark matter on the classical and thermal stability of the models, as well as its role in alleviating the Hubble tension. Then, we correspond each model with quintessence, tachyon, DBI-essence, and k-essence scalar field models of DE in FRW space-time to reconstruct potentials and the dynamics for these scalar fields. Finally, we test the swampland conjecture for each reconstructed model, providing insights into their theoretical consistency within string theory. We also examine the inflationary behavior of the models by analyzing the evolution of the slow-roll parameters <em>ϵ</em> and <em>η</em>.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1018 ","pages":"Article 117024"},"PeriodicalIF":2.5,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144654731","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":"Integrated collective dynamics: A purely theoretical scalar-tensor framework for gravitational dynamics without dark components","authors":"Esmail Dabbaghsaz ,&nbsp;Alireza Mohebalhojeh","doi":"10.1016/j.nuclphysb.2025.117029","DOIUrl":"10.1016/j.nuclphysb.2025.117029","url":null,"abstract":"<div><div>We propose Integrated Collective Dynamics (ICD), a novel scalar-tensor theory inspired by emergent phenomena in complex systems, to provide a unified, purely theoretical framework for gravitational dynamics across galactic and cosmological scales without invoking dark matter or dark energy. Integrated Collective Dynamics conceptualizes gravitational systems as ensembles of interacting particles, where collective interactions, mediated by a massive scalar field, produce emergent modifications to gravity. In the Newtonian limit, Integrated Collective Dynamics employs a rigorously derived correction function to reproduce flat galactic rotation curves, eliminating the need for dark matter through a statistical mechanics-inspired approach. Relativistically, we formulate Integrated Collective Dynamics as a scalar-tensor theory with a meticulously constructed action, deriving field equations via variational principles and solving them analytically in various regimes. The scalar field naturally induces cosmic acceleration, supplanting dark energy, and predicts qualitative modifications to gravitational lensing, the cosmic microwave background, and structure formation. New additions include quantitative predictions for rotation curves, comparisons with alternative theories, and discussions of model limitations. These predictions, grounded in perturbation theory, asymptotic analysis, and rigorous mathematical derivations, highlight Integrated Collective Dynamics's potential to reshape our understanding of gravity. Rooted in field theory and statistical mechanics, Integrated Collective Dynamics offers a mathematically elegant alternative to the ΛCDM paradigm, addressing fundamental questions about the microscopic origins of gravity and its potential unification with quantum mechanics.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1018 ","pages":"Article 117029"},"PeriodicalIF":2.5,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144672190","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":"Imprints of monopole charge in Morris-Thorne type wormholes and energy conditions under the influence of higher dimensional gravity","authors":"Enhua Dai ,&nbsp;M. Yousaf ,&nbsp;Faisal Javed ,&nbsp;Mansour Shrahili ,&nbsp;Rana Muhammad Zulqarnain","doi":"10.1016/j.nuclphysb.2025.117017","DOIUrl":"10.1016/j.nuclphysb.2025.117017","url":null,"abstract":"<div><div>This study explores anisotropic Morris-Thorne-type wormhole models with <span><math><mi>D</mi></math></span>-dimensional Einstein gravity, focusing on various shape functions. We analyze the influence of the monopole parameter on the wormhole's throat and curvature through 2<span><math><mi>D</mi></math></span> and 3<span><math><mi>D</mi></math></span> embedding diagrams, showing that higher monopole values lead to wider throats and flatter geometries, enhancing stability and traversability. Energy conditions are examined for four wormhole models (M-I to M-IV), revealing that exotic matter is required near the throat. The anisotropy parameter is studied to assess internal force behavior, providing insight into the wormhole's structural stability. Additionally, the volume integral quantifier is employed to estimate the total amount of exotic matter, indicating that only a small quantity is needed to sustain traversable geometries. These findings offer theoretical insights into wormhole configurations in <span><math><mi>D</mi></math></span>-dimensional Einstein gravity and their relevance in extended gravitational frameworks.</div></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1018 ","pages":"Article 117017"},"PeriodicalIF":2.5,"publicationDate":"2025-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144631114","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}