The European Physical Journal C最新文献_第2页

Prediction of mass and radii of anisotropic polytropic compact objects with Buchdahl-I metric

IF 4.2 2区物理与天体物理

The European Physical Journal C Pub Date : 2025-02-04 DOI: 10.1140/epjc/s10052-025-13871-1

S. A. Mardan, A. Zahra, Muhammad Bilal Riaz, Rubab Manzoor, Adnan Malik

引用次数: 0

Dark I-Love-Q

IF 4.2 2区物理与天体物理

The European Physical Journal C Pub Date : 2025-02-04 DOI: 10.1140/epjc/s10052-025-13862-2

Jing-Yi Wu, Wei Li, Xin-Han Huang, Kilar Zhang

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Primary scalar hair in Gauss–Bonnet black holes with Thurston horizons

IF 4.2 2区物理与天体物理

The European Physical Journal C Pub Date : 2025-02-04 DOI: 10.1140/epjc/s10052-025-13869-9

Luis Guajardo, Julio Oliva

{"title":"Primary scalar hair in Gauss–Bonnet black holes with Thurston horizons","authors":"Luis Guajardo, Julio Oliva","doi":"10.1140/epjc/s10052-025-13869-9","DOIUrl":"10.1140/epjc/s10052-025-13869-9","url":null,"abstract":"<div><p>In this work, we construct novel asymptotically locally AdS<span>(_5)</span> black hole solutions of Einstein–Gauss–Bonnet theory at the Chern–Simons point, supported by a scalar field that generates a primary hair. The strength of the scalar field is governed by an independent integration constant; when this constant vanishes, the spacetime reduces to a black hole geometry devoid of hair. The existence of these solutions is intrinsically tied to the horizon metric, which is modeled by three non-trivial Thurston geometries: Nil, Solv, and <span>(SL(2,{mathbb {R}}).)</span> The quadratic part of the scalar field action corresponds to a conformally coupled scalar in five dimensions -an invariance of the matter sector that is explicitly broken by the introduction of a quartic self-interaction. These black holes are characterized by two distinct parameters: the horizon radius and the temperature. Notably, there exists a straight line in this parameter space along which the horizon geometry exhibits enhanced isometries, corresponding to solutions previously reported in <i>JHEP 02, 014 (2014)</i>. Away from this line, for a fixed horizon radius and temperatures above or below a critical value, the metric’s isometries undergo spontaneous breaking. Employing the Regge–Teitelboim approach, we compute the mass and entropy of these solutions, both of which vanish. Despite this, only one of the integration constants can be interpreted as hair, as the other modifies the local geometry at the conformal boundary. Finally, for Solv horizon geometries, we extend these hairy solutions to six dimensions.</p></div>","PeriodicalId":788,"journal":{"name":"The European Physical Journal C","volume":"85 2","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjc/s10052-025-13869-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143107807","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Exploring the evolution of structure growth in the universe with field-fluid interactions through dynamical stability analysis

IF 4.2 2区物理与天体物理

The European Physical Journal C Pub Date : 2025-02-04 DOI: 10.1140/epjc/s10052-025-13856-0

Anirban Chatterjee, Abhijit Bandyopadhyay, Debasish Majumdar

{"title":"Exploring the evolution of structure growth in the universe with field-fluid interactions through dynamical stability analysis","authors":"Anirban Chatterjee, Abhijit Bandyopadhyay, Debasish Majumdar","doi":"10.1140/epjc/s10052-025-13856-0","DOIUrl":"10.1140/epjc/s10052-025-13856-0","url":null,"abstract":"<div><p>We investigate an interacting quintessence dark energy – dark matter scenario and its impact on structure formation by analyzing the evolution of scalar perturbations. The interaction is introduced by incorporating a non-zero source term into the continuity equations of the two sectors (with opposite signs), modeled as <span>(bar{Q}_0 equiv alpha bar{rho }_textrm{m}(H + kappa dot{phi }))</span>. The coupling parameter <span>(alpha )</span> and the parameter <span>(lambda )</span> involved in quintessence potential <span>(V(phi ) = V_0e^{-lambda kappa phi })</span>, play crucial roles in governing the dynamics of evolution examined within the present framework. The cosmic evolution, within this context, is depicted as a first-order autonomous system of equations involving appropriately chosen dynamical variables. We analyzed the associated stability characteristics and growth rate of perturbations, and obtained domains in the (<span>(alpha -lambda )</span>) parameter space for which fixed points can exhibit stable and non-phantom accelerating solutions. Depending on its magnitude, the coupling parameter <span>(alpha )</span> has the potential to change the characteristics of certain critical points, altering them from attractors to repellers. This model effectively captures the evolutionary features of the universe across its various phases at both the background and perturbation levels. The issue of cosmic coincidence can also be addressed within the framework of this model. We also observed that for a moderate strength of coupling, the growth rate of matter perturbation extends into the distant future.</p></div>","PeriodicalId":788,"journal":{"name":"The European Physical Journal C","volume":"85 2","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjc/s10052-025-13856-0.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143108175","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Weak gravity conjecture validation with photon spheres of quantum corrected Reissner–Nordstrom–AdS black holes in Kiselev spacetime

IF 4.2 2区物理与天体物理

The European Physical Journal C Pub Date : 2025-02-04 DOI: 10.1140/epjc/s10052-025-13857-z

Mohammad Reza Alipour, Mohammad Ali S. Afshar, Saeed Noori Gashti, Jafar Sadeghi

{"title":"Weak gravity conjecture validation with photon spheres of quantum corrected Reissner–Nordstrom–AdS black holes in Kiselev spacetime","authors":"Mohammad Reza Alipour, Mohammad Ali S. Afshar, Saeed Noori Gashti, Jafar Sadeghi","doi":"10.1140/epjc/s10052-025-13857-z","DOIUrl":"10.1140/epjc/s10052-025-13857-z","url":null,"abstract":"<div><p>In this study, we investigate the Weak Gravity Conjecture (WGC) in the context of quantum-corrected Reissner–Nordstrom–AdS (RN-AdS) black holes within Kiselev spacetime. Our focus is on photon spheres, which serve as markers for stable and unstable photon spheres. We confirm the validity of the WGC by demonstrating that quantum corrections do not alter the essential charge-to-mass ratio, thereby supporting the conjecture’s universality. Our analysis reveals that black holes with a charge greater than their mass <span>((Q > M))</span> possess photon spheres or exhibit a total topological charge of the photon sphere <span>((text {PS} = -1),)</span> which upholds the WGC. This finding is significant as it reinforces the conjecture’s applicability even in the presence of quantum corrections. Furthermore, we examine various parameter configurations to understand their impact on the WGC. Specifically, we find that configurations with <span>(omega = -frac{1}{3})</span> and <span>(omega = -1)</span> maintain the conjecture, indicating that these values do not disrupt the charge-to-mass ratio required by the WGC. However, for <span>(omega = -frac{4}{3},)</span> the conjecture does not hold, suggesting that this particular parameter value leads to deviations from the expected behavior. These results open new directions for research in quantum gravity, as they highlight the importance of specific parameter values in maintaining the WGC. The findings suggest that while the WGC is robust under certain conditions, there are scenarios where it may be challenged, prompting further investigation into the underlying principles of quantum gravity.</p></div>","PeriodicalId":788,"journal":{"name":"The European Physical Journal C","volume":"85 2","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjc/s10052-025-13857-z.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143107806","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A compact theorem on the compactness of ultra-compact objects with monotonically decreasing matter fields

IF 4.2 2区物理与天体物理

The European Physical Journal C Pub Date : 2025-02-03 DOI: 10.1140/epjc/s10052-025-13866-y

Shahar Hod

引用次数: 0

Dijet mass up to four loops with(out) ({{varvec{k}}}_{varvec{t}}) clustering

IF 4.2 2区物理与天体物理

The European Physical Journal C Pub Date : 2025-02-03 DOI: 10.1140/epjc/s10052-025-13837-3

K. Khelifa-Kerfa

引用次数: 0

New strategies for probing (Brightarrow D^*ell bar{nu }_ell ) lattice and experimental data

IF 4.2 2区物理与天体物理

The European Physical Journal C Pub Date : 2025-02-03 DOI: 10.1140/epjc/s10052-025-13773-2

M. Bordone, A. Jüttner

{"title":"New strategies for probing (Brightarrow D^*ell bar{nu }_ell ) lattice and experimental data","authors":"M. Bordone, A. Jüttner","doi":"10.1140/epjc/s10052-025-13773-2","DOIUrl":"10.1140/epjc/s10052-025-13773-2","url":null,"abstract":"<div><p>We present an analysis of the exclusive semileptonic decay <span>(Brightarrow D^*ell bar{nu }_ell )</span> based on the Belle and Belle II data made public in 2023, combined with recent lattice-QCD calculations of the hadronic transition form factors by FNAL/MILC, HPQCD and JLQCD. We also consider a new combination of the Belle and Belle II data sets by HFLAV. The analysis is based on the form-factor parameterisation by Boyd–Grinstein–Lebed (BGL), using Bayesian and frequentist statistics, for which we discuss novel strategies. We compare the results of an analysis where the BGL parameterisation is fit only to the lattice data with those from a simultaneous fit to lattice and experiment, and discuss the resulting predictions for the CKM-matrix element <span>({|V_{cb}|})</span>, as well as other phenomenological observables, such as <span>(R^{tau /mu }(D^*))</span>. We find tensions when comparing analyses based on different combinations of experimental or theoretical input, requiring the introduction of a systematic error for some of our results.</p></div>","PeriodicalId":788,"journal":{"name":"The European Physical Journal C","volume":"85 2","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjc/s10052-025-13773-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143108214","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Minimum asymptotic energy of a charged spherically symmetric thin-shell wormhole and its stability

IF 4.2 2区物理与天体物理

The European Physical Journal C Pub Date : 2025-02-03 DOI: 10.1140/epjc/s10052-025-13881-z

S. Habib Mazharimousavi

引用次数: 0

Susy at the FPF

IF 4.2 2区物理与天体物理

The European Physical Journal C Pub Date : 2025-02-03 DOI: 10.1140/epjc/s10052-025-13839-1

Luis A. Anchordoqui, Ignatios Antoniadis, Karim Benakli, Jules Cunat, Dieter Lüst

{"title":"Susy at the FPF","authors":"Luis A. Anchordoqui, Ignatios Antoniadis, Karim Benakli, Jules Cunat, Dieter Lüst","doi":"10.1140/epjc/s10052-025-13839-1","DOIUrl":"10.1140/epjc/s10052-025-13839-1","url":null,"abstract":"<div><p>Experimental searches for supersymmetry (SUSY) are entering a new era. The failure to observe signals of sparticle production at the large hadron collider (LHC) has eroded the central motivation for SUSY breaking at the weak scale. However, String Theory requires SUSY at the fundamental scale <span>(M_s)</span> and hence SUSY could be broken at some high scale below <span>(M_s)</span>. Actually, if this were the case, the lack of experimental evidence for low-energy SUSY could have been anticipated, because most stringy models with high-scale SUSY breaking predict that sparticles would start popping up above about 10 TeV, well beyond the reach of current LHC experiments. We show that using next generation LHC experiments currently envisioned for the Forward Physics Facility (FPF) we could search for signals of neutrino-modulino oscillations to probe models with string scale in the grand unification region and SUSY breaking driven by sequestered gravity in gauge mediation. This is possible because of the unprecedented flux of neutrinos to be produced as secondary products in LHC collisions during the high-luminosity era and the capability of FPF experiments to detect and identify their flavors.</p></div>","PeriodicalId":788,"journal":{"name":"The European Physical Journal C","volume":"85 2","pages":""},"PeriodicalIF":4.2,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjc/s10052-025-13839-1.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143108213","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0