Journal
PHYSICS LETTERS B
Volume 780, Issue -, Pages 294-299Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physletb.2018.03.002
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Funding
- Ramon y Cajal [RYC-2013-13019]
- FPU fellowship
- Department of Theoretical Physics & IFIC at the University of Valencia
- Spanish grant [FI52014-57387-C3-1-P]
- project H-MSCA-RISE [FunFiCO-777740]
- Con solider Program [CPANPHY-1205388]
- Severo Ochoa grant [SEV-2014-0398]
- COST (European Cooperation in Science and Technology) [CA15117]
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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 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. (C) 2018 The Authors. Published by Elsevier B.V.
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