Gravitational wave background from non-Abelian reheating after axion-like inflation

P. Klose, M. Laine, S. Procacci

A pseudoscalar inflaton $\phi$, coupled to the topological charge density $F\tilde{F}$ of a non-Abelian sector, can decay to gauge bosons ($\phi \to gg$), which may thermalize rapidly.…