Remarks on experimental bounds on quantum gravity effects on fermions

TL;DR

This paper investigates how quantum gravity effects might influence fermionic fields and suggests that modifications to the canonical structure could reconcile theoretical predictions with experimental results.

Contribution

It proposes that corrections to the canonical structure in the semi-classical regime can significantly alter quantum gravity predictions for fermions, explaining experimental discrepancies.

Findings

Quantum gravity effects on fermions are lower than predicted by loop quantum gravity.

Modifications to the canonical structure can account for the experimental mismatch.

Revised theoretical models may better align with nuclear physics experiment results.

Abstract

Effects of space time geometry fluctuations on fermionic fields have recently been looked for in nuclear physics experiments, and were found to be much lower than predicted, at a phenomenological level, by loop quantum gravity. We show that possible corrections to the canonical structure in the semi classical regime may introduce important changes in the outcome of the theory, and may explain the observed mismatch with experiments.