LQG-modified dispersion relations and the problem of cosmic photons threshold anomalies

TL;DR

This paper explores how Lorentz-symmetry violation and Loop-Quantum-Gravity-modified photon dispersion relations influence cosmic photon threshold anomalies, aiming to connect quantum gravity effects with astrophysical observations.

Contribution

It introduces a combined framework of LSV and LQG-modified photon dispersion relations to analyze cosmic photon threshold anomalies.

Findings

LQG effects modify photon dispersion relations.

The combined effects impact gamma-ray attenuation processes.

A new link between quantum gravity and astrophysical phenomena is proposed.

Abstract

Our present contribution sets out to investigate how combined effects of Lorentz-symmetry violation (LSV) and Loop-Quantum-Gravity(LQG)-modified photon dispersion relations affect the threshold anomaly of cosmic photons. The point of departure is the post-Maxwellian version of Electromagnetism induced by LQG effects. We then consider the problem of gamma-ray attenuation by the Extragalactic Background Light (EBL) and the Cosmic Microwave Background Radiation (CMB) dominated by the Breit-Wheeler Effect. By following this path, we aim at the establishment of a new bridge between LSV and astrophysical phenomena in the framework of LQG.