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Axions and low scale inflation

KMI Theory Seminar
2020-06-11 17:00
Lorenzo Ubaldi (SISSA)

Speaker: Lorenzo Ubaldi (SISSA)
Title: Inflaxion Dark Matter
Date: Thursday, June 11th, 2020, 17:00-18:00
Venue: ZOOM

Abstract:In models of axion dark matter one typically distinguishes between two scenarios, with the Peccei-Quinn symmetry broken either before or after inflation. What happens if the Hubble scale of inflation is very low, lower than the axion mass? I will address this question, considering a model in which the axion mixes kinetically with the inflaton.