The Fate of Matter Fields in Metric-Affine Gravity

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• Claire Rigouzzo (KCL)
• Friday 08 March 2024, 13:00-14:00
• Potter room/Zoom.

If you have a question about this talk, please contact Daniela Cors.

General relativity (GR) exists in different formulations. They are equivalent in pure gravity but generically lead to distinct predictions once matter is included. After a brief overview of various versions of GR, I will focus on metric-affine gravity, which avoids any assumption about the vanishing of curvature, torsion, or nonmetricity. With a view toward the Standard Model, we can construct a generic model of (complex) scalar, fermionic, and gauge fields coupled to GR and derive an equivalent metric theory, which features numerous new interaction terms. There are multiple phenomenological consequences, which I will detail: an improved setting for Higgs inflation, a new (purely gravitational) production channel for fermionic dark matter, and an outlook on axion inflation.

This talk is part of the DAMTP Friday GR Seminar series.

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