Axion Fragmentation
arXiv:1911.08472 · doi:10.1007/JHEP04(2020)010
Abstract
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.
arXiv comment29 pages and 17 figures in main text, 24 pages and 7 figures in appendices, v2: published version
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Cited by in corpus (40)
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- Supercool Composite Dark Matter Beyond 100 TeV
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