162759 20251017144624.0 doi 10.1088/1475-7516/2025/07/066 sideral 145264 ART-2025-145264 eng Carmona, J. M. Universidad de Zaragoza (orcid)0000-0003-2264-2306 Photon absorption in a doubly special relativity model with undeformed free propagation and total momentum conservation 2025 The lack of a dynamical framework within doubly special relativity theories has impeded the development of a corresponding phenomenology of modified interactions. In this work we show that in a model based on the classical basis of κ-Poincaré and total momentum conservation, one has a well-defined cross section of the photon-photon annihilation process, once a prescription for the channel treatment is set. The modification of the interaction can lead to observable effects in the opacity of the Universe to very high-energy gamma rays when the gamma-ray energy approaches the energy scale of the deformation. The magnitude and observability of this deformation are examined as functions of the gamma-ray energy and source distance. info:eu-repo/grantAgreement/ES/AEI/PID2021-126078NB-C21 info:eu-repo/grantAgreement/ES/AEI/PRE2019-089024 info:eu-repo/grantAgreement/EUR/COST-Action/CA18108 info:eu-repo/grantAgreement/ES/DGA/E21-23R info:eu-repo/semantics/closedAccess All rights reserved http://www.europeana.eu/rights/rr-f/ info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Cortés, J. L. Rescic, F. Reyes, M. A. Universidad de Zaragoza (orcid)0000-0003-1357-4815 Terzic, T. 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. 2025, 07 (2025), 066 J. Cosmol. Astropart. Phys. Journal of Cosmology and Astroparticle Physics 1475-7516 1168899 http://zaguan.unizar.es/record/162759/files/texto_completo.pdf Versión publicada 3152670 http://zaguan.unizar.es/record/162759/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:162759 articulos driver 2025-10-17-14:23:03 ARTICLE