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arxiv: 1709.04249 · v2 · pith:A2ZDPMVPnew · submitted 2017-09-13 · ✦ hep-th · gr-qc

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

A. Delhom I Latorre , Gonzalo J. Olmo , Michele Ronco This is my paper
classification ✦ hep-th gr-qc
keywords non-metricityconstraintsgravitymetric-affineobservableallowallowinganalysis
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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.

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Cited by 1 Pith paper

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Tidal Forces in the Presence of Torsion and Nonmetricity

    gr-qc 2026-06 unverdicted novelty 6.0

    Tidal acceleration of autoparallels in metric-affine gravity separates into Newtonian gravity plus linear post-Riemannian corrections from torsion and nonmetricity that can be decomposed into irreducible Lorentz components.