Approaches to photon absorption in a Lorentz invariance violation scenario

Carmona, J. M. (Universidad de Zaragoza) ; Cortés, J. L. (Universidad de Zaragoza) ; Rescic, F. ; Reyes, M. A. (Universidad de Zaragoza) ; Terzic, T. ; Vrban, F. I.

Resumen: 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.

Idioma: Inglés

DOI: 10.1103/PhysRevD.110.063035

Año: 2024

Publicado en: Physical Review D 110, 6 (2024), 063035 [13 pp.]
ISSN: 2470-0010

Financiación: info:eu-repo/grantAgreement/ES/AEI/PRE2019-089024
Financiación: info:eu-repo/grantAgreement/ES/DGA/E21-23R
Financiación: info:eu-repo/grantAgreement/ES/MICINN/PGC2022-126078NB-C21

Tipo y forma: Artículo (Versión definitiva)

Área (Departamento): Área Física Teórica (Dpto. Física Teórica)
Área (Departamento): Área Física Atóm.Molec.y Nucl. (Dpto. Física Teórica)