Reheating-Induced Axion Dark Matter After Low Scale Inflation

Abstract

A kinetic mixing between the axion and the inflaton allows for a production of axion dark matter even if the inflationary Hubble scale is smaller than the zero-temperature axion mass. We analyze the axion dynamics in this recently discovered "inflaxion" framework, and present a new cosmological scenario where the axion drifts away from its vacuum during the reheating epoch, giving rise to the observed dark matter abundance. We discuss the implications for both the QCD axion and axion-like particles.

23 pages, 5 figures, matches published version

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Cited by in corpus (4)

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• Resolving the QCD Axion Domain Wall Problem with a Light Axion
• Impact of Helical Electromagnetic Fields on the Axion Window
• Resonant ALP-Portal Dark Matter Annihilation as a Solution to the $B^{\pm }\to K^{\pm }\nu \bar{\nu }$ Excess