%0 Electronic Article
%A Fonseca de Sa, Nayara
%A Morgante, Enrico
%A Sato, Ryosuke
%A Servant, Géraldine
%T Axion Fragmentation
%N DESY 19-202
%M PUBDB-2019-04368
%M DESY 19-202
%M arXiv:1911.08472
%D 2019
%X We investigate the production of axion quanta during the early universe evolution of an axion-like field rolling down a wiggly potential. We compute the growth of quantum fluctuations and their back-reaction on the homogeneous zero-mode. We evaluate the transfer of kinetic energy from the zero mode to the quantum fluctuations and the conditions to decelerate the axion zero-mode as a function of the Hubble rate, the slope of the potential, the size of the barriers and the initial field velocity. We discuss how these effects impact the relaxion mechanism.
%F PUB:(DE-HGF)25
%9 Preprint
%R 10.3204/PUBDB-2019-04368
%U https://bib-pubdb1.desy.de/record/428106