TY  - EJOUR
AU  - Fonseca de Sa, Nayara
AU  - Morgante, Enrico
AU  - Sato, Ryosuke
AU  - Servant, Géraldine
TI  - Axion Fragmentation
IS  - DESY 19-202
M1  - PUBDB-2019-04368
M1  - DESY 19-202
M1  - arXiv:1911.08472
PY  - 2019
AB  - 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.
LB  - PUB:(DE-HGF)25
DO  - DOI:10.3204/PUBDB-2019-04368
UR  - https://bib-pubdb1.desy.de/record/428106
ER  -