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Axion Fragmentation
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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.
Forward citations
Cited by 3 Pith papers
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Dark Matter and Baryon Asymmetry from Monopole-Axion Interactions
A rotating QCD axion dissipates kinetic energy via dark monopole dyon transitions, explaining dark matter and baryon asymmetry with a predicted axion decay constant below 10^9 GeV.
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Flipped rotating axion: Baryogenesis and Dark Matter
A flipped vacuum manifold for a non-minimally coupled spectator ALP generates both baryon asymmetry through spontaneous baryogenesis and cold dark matter from later oscillations when ξ ∼ (f/m_P)^{2}.
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Flipped Rotating Axion Non-minimally Coupled to Gravity: Baryogenesis and Dark Matter
A rotating axion, kicked into motion by a sign flip in its gravitational effective potential during kination, can co-generate baryon asymmetry and dark matter in a Majoron seesaw model.
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