145410 20260217205559.0 doi 10.1103/PhysRevD.110.063035 sideral 140275 ART-2024-140275 eng Carmona, J. M. Universidad de Zaragoza (orcid)0000-0003-2264-2306 Approaches to photon absorption in a Lorentz invariance violation scenario 2024 Access copy available to the general public Unrestricted Very high-energy astrophysical gamma rays suffer a suppression of their flux along their propagation due to their interaction, through the γγ→e+e− pair-production process, with the soft photon backgrounds present in the Universe. We examine the Universe’s transparency to gamma rays within a Lorentz invariance violation (LIV) framework, focusing on photon subluminal quadratic corrections driven by a high-energy scale. Based on an explicit calculation, we provide a new expression for the cross section that overcomes the limitations of previous approaches and refines existing constraints for the LIV scale, while we introduce a new approximation that may be useful in LIV scenarios beyond effective field theory. These improvements appear essential for setting constraints on LIV effects with future observations at ultrahigh energies, where previous approximations may fall short. info:eu-repo/grantAgreement/ES/AEI/PRE2019-089024 info:eu-repo/grantAgreement/ES/DGA/E21-23R info:eu-repo/grantAgreement/ES/MICINN/PGC2022-126078NB-C21 info:eu-repo/semantics/openAccess by https://creativecommons.org/licenses/by/4.0/deed.es 5.3 2024 PHYSICS, PARTICLES & FIELDS 7 / 31 = 0.226 2024 Q1 T1 ASTRONOMY & ASTROPHYSICS 18 / 84 = 0.214 2024 Q1 T1 1.458 2024 Physics and Astronomy (miscellaneous) 2024 Q1 Nuclear and High Energy Physics 2024 Q1 9.0 2024 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Cortés, J. L. Universidad de Zaragoza (orcid)0000-0002-8282-3435 Rescic, F. Reyes, M. A. Universidad de Zaragoza (orcid)0000-0003-1357-4815 Terzic, T. Vrban, F. I. 2004 405 Universidad de Zaragoza Dpto. Física Teórica Área Física Teórica 2004 390 Universidad de Zaragoza Dpto. Física Teórica Área Física Atóm.Molec.y Nucl. 110, 6 (2024), 063035 [13 pp.] Phys. rev. D Physical Review D 2470-0010 882300 http://zaguan.unizar.es/record/145410/files/texto_completo.pdf Versión publicada 2819887 http://zaguan.unizar.es/record/145410/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:145410 articulos driver 2026-02-17-20:43:54 ARTICLE