2 papers
astro-ph.CO2026
The onset of the strong backreaction regime in axion inflation, an analytical study
Aditya Kulkarni, Lorenzo Sorbo
Models where an axion-like inflaton is coupled to a gauge field are theoretically well motivated and can display a rich phenomenology. The regime in which the quanta of the…
astro-ph.CO2024
Spectra of fermions produced by a time-dependent axion in the radiation- and matter-dominated Universe
Aditya Kulkarni, Lorenzo Sorbo
Axion-like degrees of freedom generally interact with fermions through a shift symmetric coupling. As a consequence, a time-dependent axion will lead to the generation of fermions…