AT7 - Theories of gravity: alternatives to the cosmological and particle standard models |
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Speaker |
Delhom I Latorre, Adrià |
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Coauthors |
Gonzalo J. Olmo, Michele Ronco |
| Talk Title |
Constraining metric-affine gravity with particle scattering |
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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 1TeV 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 |
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