Speaker
Francesco D'Eramo
(University of Padua & INFN Padua)
Description
Scattering and decay processes of thermal bath particles in
the early universe can dump relativistic axions in the primordial plasma. If
produced with a significant abundance, their presence can leave observable
signatures in cosmological observables probing both the early and the late
universe. In this talk, I will focus on the QCD axion and I will present recent and
significant improvements for the calculation of the axion production rate across the
different energy scales during the expansion of the universe. I will apply these
rates to predict the abundance of produced axions, and I will present the latest
cosmological bounds on the axion mass and couplings.
Primary author
Francesco D'Eramo
(University of Padua & INFN Padua)
