Gravitational corrections to two-loop beta function in quantum electrodynamics
arXiv:2105.12577 · doi:10.1103/PhysRevD.104.125001
Abstract
In this work, we use the framework of effective field theory to couple Einstein's gravity to quantum electrodynamics (QED) and determine the gravitational corrections to the two-loop beta function of the electric charge in arbitrary electrodynamics (Lorentz-like) and arbitrary (de Donder like) gravitational gauges. Our results indicate that gravitational corrections do not alter the running behavior of the electric charge; on the contrary, we observe that it gives a positive contribution to the beta function, making the electric charge grow even faster.
arXiv comment17 pages, 10 figures. Revised version
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