%0 Journal Article
%T Observable traces of non-metricity: New constraints on metric-affine gravity
%A Delhom-Latorre, A.
%A Olmo, G. J.
%A Ronco, M.
%J Physics Letters B
%D 2018
%V 780
%I Elsevier Science Bv
%@ 0370-2693
%G English
%F Delhom-Latorre_etal2018
%O WOS:000432187800045
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=3617), last updated on Thu, 28 Jun 2018 14:27:19 +0000
%X 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 Bahbah 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.
%R 10.1016/j.physletb.2018.03.002
%U http://arxiv.org/abs/1709.04249
%U https://doi.org/10.1016/j.physletb.2018.03.002
%P 294-299