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Fermion Creation by Cosmic Perturbations at 1-loop

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If you have a question about this talk, please contact Thomas Colas .

Weyl spin 1/2 fermions, when minimally coupled to Einstein’s gravity, cannot be produced purely gravitationally in an expanding universe at tree level. However, this picture changes at the gravitational 1-loop level in the presence of cosmic perturbations, leading to a new and unavoidable mechanism for gravitational particle production. In this talk, I will explore the theory and phenomenological implications of this new effect.

This talk is part of the Cosmology Lunch series.

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