Noninflationary axion and ALP misalignment mechanism
Phys. Rev. D 112, 103523 – Published 17 November, 2025
DOI: https://doi.org/10.1103/k3hh-gszm
Abstract
Based on considerations of quantum gravity, global symmetries which lead to axions as pseudo- Nambu-Goldstone bosons after low scale symmetry breaking cannot be exact at the Planck scale. Here, we show that Planck-suppressed terms which yield this symmetry breaking may provide a noninflationary misalignment mechanism which can generate coherent oscillations of the axion and axionlike particle (ALP) fields at low temperatures.
