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PIRSA:22090074

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https://pirsa.org/22090074

Effective Field Theory of the waterfall phase in hybrid inflation

Mylova, M. (2022). Effective Field Theory of the waterfall phase in hybrid inflation. Perimeter Institute for Theoretical Physics. https://pirsa.org/22090074

Maria Mylova University of Tokyo

Talk numberPIRSA:22090074
DOI10.48660/22090074
Source RepositoryPIRSA
Collection
Talk Type Scientific Series
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Abstract

We examine the validity of the classical approximation of the waterfall phase transition in hybrid inflation from an effective field theory (EFT) point of view. The EFT is constructed by integrating out the waterfall field fluctuations, up to one-loop order in the perturbative expansion. Assuming slow-roll conditions are obeyed, right after the onset of the waterfall phase, we find the backreaction of the waterfall field fluctuations to the evolution of the system can be dominant. In this case the classical approximation is completely spoiled. We derive the necessary constraint that ensures the validity of the EFT.

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