Quantum Gravity Phenomenology and Particle Physics

TL;DR

This paper explores how terrestrial particle accelerators can be used to investigate quantum gravity effects, focusing on CPT symmetry deformation and potential experimental signatures like decay time differences.

Contribution

It proposes a novel approach to quantum gravity phenomenology using particle accelerators, emphasizing CPT symmetry deformation and related experimental signatures.

Findings

Potential CPT deformation effects on particle-antiparticle decay times

Interference phenomena in quantum fields due to quantum gravity

Feasibility of terrestrial experiments for quantum gravity signals

Abstract

Quantum gravity phenomenology has been historically regarded as a difficult endeavour, due to the apparent scarcity of phenomena involving the required scales of length (Planck length $l_P$) and energy (Planck energy $E_P$). It was realized, however, that one can look for cumulative effects of a quantum theory of gravity at energies $E/E_P \ll 1$ if even tiny effects are amplified by the large time of flight or very high energies, common to astrophysical phenomena. In the this work, complementary to the COST action CA18108 White Book, we put forward a proposal that quantum gravity phenomenology can be fruitfully pursued also with the help of terrestrial particles accelerators. We first discuss the theoretical background, and then concentrate on deformed discrete symmetries C,P,T. We investigate possible experimental signatures of CPT deformation, particularly concerning the difference in decay time between particles and antiparticles, and fields interference.