Universality of gauge coupling constant in the Einstein-QED system
High Energy Physics - Theory
2021-12-15 v3
Abstract
In this paper we discuss the universality of the renormalization of the gauge coupling constant in the quantum electrodynamics coupled to the Einstein's gravity in the framework of effective field theory in an arbitrary gauge. We observe that the renormalization of the three-point functions with different particles receive different contributions from the gravitational sector. Despite that, the universality of the gauge coupling constants is guaranteed by the Ward identity that makes the renormalized electric charge receive no contribution from the gravitational sector at one-loop order.
Keywords
Cite
@article{arxiv.2105.12732,
title = {Universality of gauge coupling constant in the Einstein-QED system},
author = {L. Ibiapina Bevilaqua and A. C. Lehum and Huan Souza},
journal= {arXiv preprint arXiv:2105.12732},
year = {2021}
}
Comments
20 pages, 8 figures. V2: calculations in arbitrary gauge, conclusions have been updated. V3: a section was added; to appear in PRD