Observable traces of non-metricity: new constraints on metric-affine gravity
High Energy Physics - Theory
2019-07-11 v2 General Relativity and Quantum Cosmology
Abstract
Relaxing the Riemannian condition to incorporate geometric quantities such as torsion and non-metricity may allow to explore new physics associated with defects in a hypothetical space-time microstructure. Here we show that non-metricity produces observable effects in quantum fields in the form of 4-fermion contact interactions, thereby allowing us to constrain the scale of non-metricity to be greater than 1 TeV by using results on Bhabha scattering. Our analysis is carried out in the framework of a wide class of theories of gravity in the metric-affine approach. The bound obtained represents an improvement of several orders of magnitude to previous experimental constraints.
Keywords
Cite
@article{arxiv.1709.04249,
title = {Observable traces of non-metricity: new constraints on metric-affine gravity},
author = {A. Delhom I Latorre and Gonzalo J. Olmo and Michele Ronco},
journal= {arXiv preprint arXiv:1709.04249},
year = {2019}
}
Comments
Updated to the published version, some minor typos fixed