TY  - JOUR
AU  - Delhom-Latorre, A.
AU  - Olmo, G. J.
AU  - Ronco, M.
PY  - 2018
DA  - 2018//
TI  - Observable traces of non-metricity: New constraints on metric-affine gravity
T2  - Phys. Lett. B
JO  - Physics Letters B
SP  - 294
EP  - 299
VL  - 780
PB  - Elsevier Science Bv
AB  - 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.
SN  - 0370-2693
UR  - http://arxiv.org/abs/1709.04249
UR  - https://doi.org/10.1016/j.physletb.2018.03.002
DO  - 10.1016/j.physletb.2018.03.002
LA  - English
N1  - WOS:000432187800045
ID  - Delhom-Latorre_etal2018
ER  -