Spin Flavor Conversion of Neutrinos in Loop Quantum Gravity

TL;DR

This paper reviews how loop quantum gravity's Lorentz invariance breakdown and associated scale parameter affect neutrino spin-flavor conversion, highlighting potential observable effects in neutrino physics.

Contribution

It introduces the impact of the LQG-induced scale length and helicity terms on neutrino spin-flip phenomena, a novel aspect in quantum gravity phenomenology.

Findings

LQG scale parameter influences neutrino dispersion relations.

Helicity terms modify neutrino flavor conversion probabilities.

Potential observable effects in neutrino experiments.

Abstract

Loop quantum gravity theory incorporates a new scale length ${\cal L}$ which induces a Lorentz invariance breakdown. This scale can be either an universal constant or can be fixed by the momentum of particles (${\cal L}\sim p^{-1}$). Effects of the scale parameter ${\cal L}$ and helicity terms occurring in the dispersion relation of fermions are reviewed in the framework of spin-flip conversion of neutrino flavors.