Physics Letters B最新文献

{"title":"Low scale leptogenesis and TM1 mixing in neutrinophilic two Higgs doublet model (&nu;2HDM) with S4 flavor symmetry","authors":"Abhishek,&nbsp;V. Suryanarayana Mummidi","doi":"10.1016/j.physletb.2025.139919","DOIUrl":"10.1016/j.physletb.2025.139919","url":null,"abstract":"<div><div>We study a modified version of the Standard Model that includes a scalar doublet and two right-handed neutrinos, forming the neutrinophillic two higgs doublet (<span><math><mrow><mi>ν</mi><mtext>2HDM</mtext></mrow></math></span>) framework. For the two Higgs-doublet vacuum expectation values satisfying <span><math><mrow><msub><mtext>v</mtext><mn>2</mn></msub><mo>&lt;</mo><mo>&lt;</mo><msub><mtext>v</mtext><mn>1</mn></msub></mrow></math></span>, this model operates at a TeV scale, bringing the RHNs within experimental reach. To further enhance its predictive power, we introduce an <span><math><mrow><msub><mi>S</mi><mn>4</mn></msub><mo>×</mo><msub><mi>Z</mi><mn>4</mn></msub></mrow></math></span> flavor symmetry with five flavons, resulting in mass matrices that realize the so-called Trimaximal <span><math><msub><mtext>TM</mtext><mn>1</mn></msub></math></span> mixing scheme. The model effectively explains lepton masses and flavor mixing under the normal ordering of neutrino masses, predicting that the effective neutrino mass in 0<span><math><mrow><mi>ν</mi><mi>β</mi><mi>β</mi></mrow></math></span> decay lies between [4 - 5] meV, significantly lower than the sensitivity limits of current experiments. We also investigate how this framework could support low-scale leptogenesis as a natural way to explain the observed imbalance between matter and antimatter in the Universe. This work explores how neutrino physics, flavor symmetry and baryon asymmetry are connected, providing a clear framework that links theoretical predictions with experimental possibilities.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"870 ","pages":"Article 139919"},"PeriodicalIF":4.5,"publicationDate":"2025-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145227623","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Photoinduced inclusive cross sections in hadronic collisions at the LHC","authors":"Robert Gȩbarowski ,&nbsp;Agnieszka Łuszczak ,&nbsp;Marta Łuszczak ,&nbsp;Wolfgang Schäfer","doi":"10.1016/j.physletb.2025.139899","DOIUrl":"10.1016/j.physletb.2025.139899","url":null,"abstract":"<div><div>We discuss inclusive electromagnetic dissociation processes in proton–proton (<span><math><mrow><mi>p</mi><mi>p</mi></mrow></math></span>) and proton–nucleus (<span><math><mrow><mi>p</mi><mi>A</mi></mrow></math></span>) scattering at the LHC where one or both of the protons dissociate. These processes which involve the exchange of a virtual photon in the <span><math><mi>t</mi></math></span>–channel are calculable in terms of deep inelastic structure functions (virtual photoabsorption cross sections). For the <span><math><mrow><mi>p</mi><mi>A</mi><mo>→</mo><mi>X</mi><mi>A</mi></mrow></math></span> reaction there emerges the possibility of measuring the total photoabsorption cross section on the proton at very high energies.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"870 ","pages":"Article 139899"},"PeriodicalIF":4.5,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145227659","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Higher-spin light-flavor baryonic spectroscopy in AdS/QCD at finite temperature","authors":"R. da Rocha ,&nbsp;P.H.O. Silva","doi":"10.1016/j.physletb.2025.139917","DOIUrl":"10.1016/j.physletb.2025.139917","url":null,"abstract":"<div><div>Light-flavor baryon resonances in the <span><math><mrow><msup><mi>J</mi><mi>P</mi></msup><mo>=</mo><mn>3</mn><mo>/</mo><msup><mn>2</mn><mo>+</mo></msup></mrow></math></span>, <span><math><mrow><msup><mi>J</mi><mi>P</mi></msup><mo>=</mo><mn>5</mn><mo>/</mo><msup><mn>2</mn><mo>+</mo></msup></mrow></math></span>, and <span><math><mrow><msup><mi>J</mi><mi>P</mi></msup><mo>=</mo><mn>5</mn><mo>/</mo><msup><mn>2</mn><mo>−</mo></msup></mrow></math></span> families are investigated in a soft-wall AdS/QCD model at finite temperature, including the zero temperature limit. Regge-like trajectories relating the configurational entropy underlying these resonances to both the radial quantum number and the baryon mass spectra are constructed, allowing for the extrapolation of the higher-spin light-flavor baryonic mass spectra to higher values of the radial quantum number. The configurational entropy is shown to increase drastically with temperature, in the range beyond 38 MeV. The mass spectra of baryon families are analyzed, supporting a phase transition nearly above the Hagedorn temperature.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"870 ","pages":"Article 139917"},"PeriodicalIF":4.5,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145269175","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Quantum corrections to Dymnikova-Schwinger black holes in Einstein-Gauss-Bonnet gravity","authors":"A. Errehymy ,&nbsp;Y. Khedif ,&nbsp;M. Daoud ,&nbsp;K. Myrzakulov ,&nbsp;B. Turimov ,&nbsp;T. Myrzakul","doi":"10.1016/j.physletb.2025.139915","DOIUrl":"10.1016/j.physletb.2025.139915","url":null,"abstract":"<div><div>This work investigates black holes within a modified framework of gravity that incorporates quantum-inspired corrections and a fundamental minimal length scale. By integrating Einstein-Gauss-Bonnet gravity with a specially tailored matter source that models quantum particle creation, we derive novel, non-singular black hole solutions. These black holes exhibit rich horizon structures and, notably, do not undergo complete evaporation—instead, they stabilize into permanent remnants. In addition to analyzing the thermodynamic implications of quantum corrections to Dymnikova-Schwinger black holes, we examine their quasinormal mode spectra using the WKB approximation, alongside their associated energy emission rates. Our findings provide compelling new perspectives on how quantum effects may address foundational issues such as the black hole information loss paradox.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"870 ","pages":"Article 139915"},"PeriodicalIF":4.5,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145269210","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Proton spin from small-x with constraints from the valence quark model","authors":"Daniel Adamiak ,&nbsp;Heikki Mäntysaari ,&nbsp;Yossathorn Tawabutr","doi":"10.1016/j.physletb.2025.139911","DOIUrl":"10.1016/j.physletb.2025.139911","url":null,"abstract":"<div><div>We apply the valence quark model [1] to constrain the non-perturbative initial condition for the small-<span><math><mi>x</mi></math></span> helicity evolution. The remaining free parameters are constrained by performing a global analysis akin to Adamiak et al. [2] to the available polarized small-<span><math><mi>x</mi></math></span> deep inelastic scattering data. A good description of the world data is obtained with only 8 free parameters. The model parameters are tightly constrained by the data, allowing us to predict the proton polarized structure function <span><math><msubsup><mi>g</mi><mn>1</mn><mi>p</mi></msubsup></math></span> to be negative at small <span><math><mi>x</mi></math></span>. Furthermore, we obtain the small-<span><math><mi>x</mi></math></span> quark and gluon spins to give a contribution <span><math><mrow><msubsup><mo>∫</mo><mrow><msup><mn>10</mn><mrow><mo>−</mo><mn>5</mn></mrow></msup></mrow><mrow><mn>0.1</mn></mrow></msubsup><mrow><mi>d</mi></mrow><mi>x</mi><mrow><mo>(</mo><mfrac><mn>1</mn><mn>2</mn></mfrac><mstyle><mi>Δ</mi></mstyle><mstyle><mi>Σ</mi></mstyle><mo>+</mo><mstyle><mi>Δ</mi></mstyle><mi>G</mi><mo>)</mo></mrow><mo>=</mo><mn>0.63</mn><mo>±</mo><mn>0.10</mn></mrow></math></span> or <span><math><mrow><mn>1.35</mn><mo>±</mo><mn>0.16</mn></mrow></math></span> to the proton spin, depending on the applied running coupling prescription.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"870 ","pages":"Article 139911"},"PeriodicalIF":4.5,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145311774","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Deflection angle of regular black holes in nonlinear electrodynamics: Gauss-Bonnet theorem, time delay, shadow, and greybody bound","authors":"Susmita Sarkar ,&nbsp;Nayan Sarkar ,&nbsp;Hasrat Hussian Shah ,&nbsp;Pankaj Balo ,&nbsp;Farook Rahaman","doi":"10.1016/j.physletb.2025.139905","DOIUrl":"10.1016/j.physletb.2025.139905","url":null,"abstract":"<div><div>In this article, we study the weak gravitational lensing in the background of regular, static, spherically symmetric black hole solutions of Einstein’s standard general relativity coupled with nonlinear electrodynamics. The weak deflection angles are estimated in the context of vacuum medium and plasma medium using the Gauss-Bonnet method. The obtained deflection angles decrease as the impact parameter <span><math><mi>b</mi></math></span> and the charge parameter <span><math><mi>q</mi></math></span> increase, while the deflection angles increase gradually with increasing values of the black hole mass <span><math><mi>m</mi></math></span>. Moreover, the effect of a plasma medium has increased the deflection angle than the vacuum medium scenario. We also estimate the time delay in the field of the described black holes that vanishes for <span><math><mrow><mi>m</mi><mo>=</mo><mi>q</mi><mo>=</mo><mn>0</mn></mrow></math></span>, i.e., the absence of the black holes. The shadow cast of the present black holes is also analyzed with respect to the impact <span><math><mi>q</mi></math></span> and mass <span><math><mi>m</mi></math></span>, which ensures that the shadow region shrinks for increasing values of <span><math><mi>q</mi></math></span> and expands for increasing values of <span><math><mi>m</mi></math></span>. In addition, we estimated the rigorous bounds of the greybody factor <span><math><msub><mi>T</mi><mi>b</mi></msub></math></span> for the described black holes and the graphical analysis ensures that the increasing charge parameter <span><math><mi>q</mi></math></span> decreases the rigorous bound of <span><math><msub><mi>T</mi><mi>b</mi></msub></math></span> and the increasing mass <span><math><mi>m</mi></math></span> increases the rigorous bound of <span><math><msub><mi>T</mi><mi>b</mi></msub></math></span>.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"870 ","pages":"Article 139905"},"PeriodicalIF":4.5,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145269693","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 actions and asymptotic charges at null infinity for any spin","authors":"Andrea Campoleoni ,&nbsp;Arnaud Delfante ,&nbsp;Dario Francia ,&nbsp;Carlo Heissenberg","doi":"10.1016/j.physletb.2025.139908","DOIUrl":"10.1016/j.physletb.2025.139908","url":null,"abstract":"<div><div>We identify boundary terms renormalizing the free on-shell actions for massless fields of arbitrary spin, including electromagnetism and linearized gravity, with boundary conditions allowing for supertranslation-like asymptotic symmetries. Our focus is on null infinity, in any spacetime dimensions. We also comment on the renormalization of the corresponding asymptotic charges.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"870 ","pages":"Article 139908"},"PeriodicalIF":4.5,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145364024","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 f(R,Lm) gravity with SN Ia and BAO observational data in Bianchi I space time","authors":"Vinod Kumar Bhardwaj ,&nbsp;Anil Kumar Yadav ,&nbsp;S.H. Shekh","doi":"10.1016/j.physletb.2025.139910","DOIUrl":"10.1016/j.physletb.2025.139910","url":null,"abstract":"<div><div>In this study, we investigate the viability of the <span><math><mrow><mi>f</mi><mo>(</mo><mi>R</mi><mo>,</mo><msub><mi>L</mi><mi>m</mi></msub><mo>)</mo></mrow></math></span> gravity framework in explaining the accelerated expansion of the universe within the context of the locally rotationally symmetric (LRS) Bianchi-I space-time. Modified gravity theories have emerged as promising alternatives to General Relativity (GR) to account for cosmic acceleration and dark energy phenomena. We employ observational constraints from Type Ia Supernovae (SN Ia), Baryon Acoustic Oscillations (BAO), and Cosmic Chronometers (CC) to calibrate the free parameters of our model. The field equations are formulated based on a specific functional form of <span><math><mrow><mi>f</mi><mo>(</mo><mi>R</mi><mo>,</mo><msub><mi>L</mi><mi>m</mi></msub><mo>)</mo></mrow></math></span>, and analytical solutions are obtained. The Hubble parameter, deceleration parameter (<span><math><mi>q</mi></math></span>), statefinder diagnostics <span><math><mrow><mo>(</mo><mi>r</mi><mo>,</mo><mi>s</mi><mo>)</mo></mrow></math></span>, and the jerk parameter (<span><math><mi>j</mi></math></span>) are utilized to analyze the evolutionary dynamics of the universe. Our results indicate a transition from a decelerating to an accelerating phase, with the transition redshift <span><math><mrow><msub><mi>z</mi><mi>t</mi></msub><mo>=</mo><mn>0</mn><mo>.</mo><msubsup><mn>7293</mn><mrow><mo>−</mo><mn>0.06</mn></mrow><mrow><mo>+</mo><mn>0.07</mn></mrow></msubsup></mrow></math></span> and present deceleration parameter <span><math><mrow><msub><mi>q</mi><mn>0</mn></msub><mo>=</mo><mo>−</mo><mn>0.56</mn></mrow></math></span>, consistent with observational data. The estimated age of the universe in this framework is <span><math><mrow><mn>13.27</mn><mo>±</mo><mn>0.26</mn></mrow></math></span> Gyrs. The statefinder parameters suggest that the model closely mimics the standard <span><math><mstyle><mi>Λ</mi></mstyle></math></span>CDM scenario at present but exhibits deviations at earlier epochs, potentially indicating a dynamic nature of dark energy. The <span><math><msub><mi>O</mi><mi>m</mi></msub></math></span> diagnostic further confirms the compatibility of our model with a phantom-like behavior of dark energy. These findings support the viability of <span><math><mrow><mi>f</mi><mo>(</mo><mi>R</mi><mo>,</mo><msub><mi>L</mi><mi>m</mi></msub><mo>)</mo></mrow></math></span> gravity as an alternative framework for explaining cosmic acceleration, providing new interplay between matter and curvature in gravitational dynamics.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"870 ","pages":"Article 139910"},"PeriodicalIF":4.5,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145227627","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Power-law F(R) gravity as deformations to Starobinsky inflation in view of ACT","authors":"S.D. Odintsov ,&nbsp;V.K. Oikonomou","doi":"10.1016/j.physletb.2025.139907","DOIUrl":"10.1016/j.physletb.2025.139907","url":null,"abstract":"<div><div>In this work we aim to provide a new parametrization of power-law <span><math><mrow><mi>F</mi><mo>(</mo><mi>R</mi><mo>)</mo></mrow></math></span> gravity inflation framework in the Jordan frame. It is known in the literature that the power-law <span><math><mrow><mi>F</mi><mo>(</mo><mi>R</mi><mo>)</mo></mrow></math></span> gravity inflation of the form <span><math><mrow><mi>F</mi><mrow><mo>(</mo><mi>R</mi><mo>)</mo></mrow><mo>=</mo><mi>R</mi><mo>+</mo><mi>β</mi><msup><mi>R</mi><mi>n</mi></msup></mrow></math></span> is non-viable and produces a power-law evolution. We demonstrate that the standard approach in power-law <span><math><mrow><mi>F</mi><mo>(</mo><mi>R</mi><mo>)</mo></mrow></math></span> gravity inflation has some parametrization issues that may lead to inconsistencies and we introduce a new parametrization which elevates the role of power-law <span><math><mrow><mi>F</mi><mo>(</mo><mi>R</mi><mo>)</mo></mrow></math></span> gravity deformations of the Starobinsky inflation, making it viable and compatible with both the Planck and ACT data. In our approach the power-law <span><math><mrow><mi>F</mi><mo>(</mo><mi>R</mi><mo>)</mo></mrow></math></span> gravity inflation is disentangled from a power-law evolution.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"870 ","pages":"Article 139907"},"PeriodicalIF":4.5,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145227625","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Confronting rainbow-deformed f(R) gravity with the ACT data","authors":"S.D. Odintsov ,&nbsp;V.K. Oikonomou","doi":"10.1016/j.physletb.2025.139909","DOIUrl":"10.1016/j.physletb.2025.139909","url":null,"abstract":"<div><div>In this work we examine a theoretical scenario which combines two fundamental theoretical proposals for the early Universe and a possible evolution for the early post-inflationary epoch. Specifically, we assume that the early Universe contains gravity’s rainbow effects on the spacetime and the inflationary Lagrangian contains <span><math><msup><mi>R</mi><mn>2</mn></msup></math></span> corrections or <span><math><mrow><mi>f</mi><mo>(</mo><mi>R</mi><mo>)</mo></mrow></math></span> gravity corrections in general. In addition we assume that the era beyond the end of inflation until the reheating temperature is reached, is a kination era. Both theories, <span><math><msup><mi>R</mi><mn>2</mn></msup></math></span> and gravity’s rainbow emerge from a quantum context so their effects should be first checked at the theory which connects the quantum with the classical, hence inflation. Spacetime is four dimensional and the effects of the quantum theory could possibly be imprinted in the inflationary Lagrangian and of course on the spacetime itself. For the gravity’s rainbow deformed Starobinsky model, both Lagrangian quantum effects and spacetime quantum effects are combined. As we show the resulting theory is compatible with the ACT data, regarding the spectral index. We also consider power-law <span><math><mrow><mi>f</mi><mo>(</mo><mi>R</mi><mo>)</mo></mrow></math></span> gravity deformations and we show that in this case, the model is viable without the need of extending the slow-roll era of inflation.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"870 ","pages":"Article 139909"},"PeriodicalIF":4.5,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145227630","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}