Loop Quantum Gravity Corrections and Cosmic Ray Decays

TL;DR

This paper reviews loop quantum gravity effective theories and analyzes how they modify decay thresholds, potentially explaining cosmic ray anomalies and predicting helicity-dependent effects at high energies.

Contribution

It provides a kinematical analysis of decay thresholds within loop quantum gravity, highlighting possible helicity-dependent violations of the GZK limit.

Findings

Modified threshold conditions for decay reactions

Potential helicity-dependent violation of the GZK limit

Prediction of favored helicity states in high-energy particles

Abstract

Loop quantum gravity effective theories are reviewed in the context of the observed GZK limit anomaly and related processes. This is accomplished through a kinematical analysis of the modified threshold conditions for the involved decay reactions, arising from the theory. Specially interesting is the possibility of an helicity dependant violation of the limit, whose primary effect would be the observation of favoured helicity states for highly energetic particles.