Charged black holes in KR gravity: Weak deflection angle, shadow cast, quasinormal modes and neutrino annihilation

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dc.contributor.authorPantig, Reggie C.
dc.contributor.authorOvgun, Ali
dc.contributor.authorRincon, Angel
dc.date.accessioned2026-02-06T18:37:44Z
dc.date.issued2025
dc.departmentDoğu Akdeniz Üniversitesi
dc.description.abstractIn this paper, we investigate the phenomenology of electrically charged black holes in a Lorentz-violating gravitational framework mediated by a background Kalb-Ramond (KR) antisymmetric tensor field. Employing the Gauss-Bonnet theorem (GBT) in a non-asymptotically flat geometry, we derive analytic expressions for the weak deflection angle of light and massive particles, revealing persistent corrections due to the Lorentz-violating parameter 8. Scalar and Dirac perturbations are also studied using both the Wentzel-Kramers-Brillouin (WKB) approximation and the P & ouml;schl-Teller approximation approach to verify the stability of the solution against these types of perturbations. Shadow analysis further uncovers a nontrivial deformation of the photon sphere and critical impact parameter, with KR-induced effects modifying the charge contribution in a manner incompatible with standard Einstein-Maxwell theory. Constraints derived from the Event Horizon Telescope (EHT) data for Sgr A* and M87* validate the model and provide stringent bounds on 8, establishing the KR framework as an observationally testable extension of General Relativity (GR).
dc.description.sponsorshipCOST (European Cooperation in Science and Technology); TUBITAK, Spain; SCOAP3 (Switzerland)
dc.description.sponsorshipA. R. acknowledge financial support from Conselleria d'Educacio, Cultura, Universitats i Ocupacio de la Generalitat Valenciana, Spain thorugh PROMETEO PROJECT CIPROM/2022/13. A. R. is very grateful for the hospitality of the Centre for Theoretical Physics and Astrophysics, Institute of Physics, Silesian University in Opava, the University of Valencia, and the Complutense University of Madrid, in Spain. R. P. and A. O. would like to acknowledge networking support of the COST Action CA18108-Quantum gravity phenomenology in the multi-messenger approach (QG-MM), COST Action CA21106-COSMIC WISPers in the Dark Universe: Theory, astrophysics and experiments (CosmicWISPers), the COST Action CA22113-Fundamental challenges in theoretical physics (THEORY-CHALLENGES), the COST Action CA21136-Addressing observational tensions in cosmology with systematics and fundamental physics (CosmoVerse), the COST Action CA23130-Bridging high and low energies in search of quantum gravity (BridgeQG), and the COST Action CA23115-Relativistic Quantum Information (RQI) funded by COST (European Cooperation in Science and Technology). A. O also thanks to EMU, Spain, TUBITAK, Spain, ULAKBIM (Turkiye) and SCOAP3 (Switzerland) for their support.
dc.identifier.doi10.1016/j.dark.2025.102029
dc.identifier.issn2212-6864
dc.identifier.orcid0000-0002-3101-8591
dc.identifier.orcid0000-0002-9889-342X
dc.identifier.orcid0000-0001-8069-9162
dc.identifier.scopus2-s2.0-105012539387
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1016/j.dark.2025.102029
dc.identifier.urihttps://hdl.handle.net/11129/12599
dc.identifier.volume49
dc.identifier.wosWOS:001546580500001
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherElsevier
dc.relation.ispartofPhysics of the Dark Universe
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_WoS_20260204
dc.subjectBlack holes
dc.subjectLorentz symmetry breaking
dc.subjectKalb-Ramond
dc.subjectWeak deflection angle
dc.subjectNeutrino annihilation
dc.subjectQuasinormal modes
dc.titleCharged black holes in KR gravity: Weak deflection angle, shadow cast, quasinormal modes and neutrino annihilation
dc.typeArticle

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