Pseudo-Nambu-Goldstone boson production from inflaton coupling during reheating
Pseudo-Nambu-Goldstone boson production from inflaton coupling during reheating
Abstract The existence of pseudo-Nambu-Goldstone boson (pNGB) fields is a common feature in many models beyond the Standard Model, characterized by their exclusive derivative couplings. This paper investigates a scenario where a pNGB is coupled to the inflaton field during the reheating phase of the early universe. We calculate the …