Absorption of TeV Photons and $\kappa$-deformed Poincar\'{e} algebra

TL;DR

This paper investigates how $$-deformation of the Poincare9 algebra affects high-energy photon collision processes, with implications for understanding multi-TeV photon observations from astrophysical sources.

Contribution

It analyzes the impact of $$-deformation on photon collision kinematics, revealing significant effects above threshold without altering leading-order threshold conditions.

Findings

$$-deformation significantly affects processes above threshold

No leading-order change in threshold conditions due to deformation

Implications for interpreting multi-TeV photon observations

Abstract

We consider the process of collision between a hard photon and a soft photon producing an electron-positron pair, under the assumption that the kinematics be described according to the $\kappa$-deformation of the D=4 Poincar\'{e} algebra. We emphasize the relevance of this analysis for the understanding of the puzzling observations of multi-TeV photons from Markarian 501. We find a significant effect of the $\kappa$-deformation for processes above threshold, while, in agreement with a previous study, we find that there is no leading-order deformation of the threshold condition.