Absorption of TeV Photons and $\kappa$-deformed Poincaré algebra

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 Poincaré 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.

LaTeX, 9 pages. Amelino-Camelia joined the collaboration. We improved the analysis in many ways; in particular, we now find full agreement witha previous study, by Amelino-Camelia and Piran, of threshold particle-production. We also present an analysis of processes above threshold, obtaining results that could provide an explanation for puzzling observations of multi-TeV photons Markarian501

References in corpus (4)

• Probing The Structure of Space-Time with Cosmic Rays
• An infrared background--TeV gamma-ray crisis?
• Wave-Particle duality at the Planck scale: Freezing of neutrino oscillations
• Cosmic rays and TeV photons as probes of quantum properties of space-time

Cited by in corpus (4)

• Constraints on Lorentz Invariance Violating Quantum Gravity and Large Extra Dimensions Models using High Energy Gamma Ray Observations
• Large-scale non-locality in "doubly special relativity" with an energy-dependent speed of light
• Tests of Quantum Gravity and Large Extra Dimensions Models Using High Energy Gamma Ray Observations
• TeV-photon paradox and space with SU(2) fuzziness