Light charged fermions in quantum gravity
High Energy Physics - Theory
2021-06-02 v2 General Relativity and Quantum Cosmology
High Energy Physics - Phenomenology
Abstract
We study the impact of quantum gravity on a system of chiral fermions that are charged under an Abelian gauge group. Under the impact of quantum gravity, a finite value of the gauge coupling could be generated and in turn drive four-fermion interactions to criticality. We find indications that the gravity-gauge-fermion interplay protects the lightness of fermions for a large enough number of fermions. On the other hand, for a smaller number of fermions, chiral symmetry may be broken, which would be in tension with the observation of light fermions.
Keywords
Cite
@article{arxiv.2010.00605,
title = {Light charged fermions in quantum gravity},
author = {Gustavo P. de Brito and Astrid Eichhorn and Marc Schiffer},
journal= {arXiv preprint arXiv:2010.00605},
year = {2021}
}
Comments
12 pages, 6 figures. Match the published version