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.

Observable traces of non-metricity: new constraints on metric-affine gravity / Delhom-Latorre, Adrià; Olmo, Gonzalo J.; Ronco, Michele. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 780:(2018), pp. 294-299. [10.1016/j.physletb.2018.03.002]

Observable traces of non-metricity: new constraints on metric-affine gravity

Ronco, Michele
2018

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 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.
2018
Nuclear and High Energy Physics; theories of gravity; geometric quantities
01 Pubblicazione su rivista::01a Articolo in rivista
Observable traces of non-metricity: new constraints on metric-affine gravity / Delhom-Latorre, Adrià; Olmo, Gonzalo J.; Ronco, Michele. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 780:(2018), pp. 294-299. [10.1016/j.physletb.2018.03.002]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1227735
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