Resonant nonlinear pairs in the axiverse and their late-time direct and astrophysical signatures
Resonant nonlinear pairs in the axiverse and their late-time direct and astrophysical signatures
A generic low-energy prediction of string theory is the existence of a large collection of axions, commonly known as a string axiverse. Axions also have a natural cosmological production mechanism, vacuum misalignment, making them well-motivated dark matter (DM) candidates. Much work on axion production has considered the case of a …