Physical running of couplings in quadratic gravity
High Energy Physics - Theory
2024-07-02 v2 General Relativity and Quantum Cosmology
High Energy Physics - Phenomenology
Abstract
We argue that the well-known beta functions of quadratic gravity do not correspond to the physical dependence of scattering amplitudes on external momenta, and derive the correct physical beta functions. Asymptotic freedom turns out to be compatible with the absence of tachyons.
Cite
@article{arxiv.2403.02397,
title = {Physical running of couplings in quadratic gravity},
author = {Diego Buccio and John F. Donoghue and Gabriel Menezes and Roberto Percacci},
journal= {arXiv preprint arXiv:2403.02397},
year = {2024}
}
Comments
8 pages, 2 figures, 2 tables; v2: Some modifications throughout the text. Revised version as accepted by PRL