Carmona, J. M. Cortés, J. L. Rescic, F. Reyes, M. A. Terzic, T. Photon absorption in a doubly special relativity model with undeformed free propagation and total momentum conservation J. Cosmol. Astropart. Phys. 10.1088/1475-7516/2025/07/066 2025 2025