Speaker
Francescopaolo Lopez
(SISSA, Istituto Nazionale di Fisica Nucleare)
Description
Very little is known about the reheating phase after inflation, which is only constrained to finish before BBN, at a temperature higher than O(1) MeV. We show that this effective matter domination can be long enough that structures can form, inflaton star can condense inside the halos and eventually grow to collapse into PBH. By employing PBH constraints we are able to improve constraints on reheating temperature of several orders of magnitude. We then consider a concrete scenario of perturbative reheating, with inflatons decaying into fermions. We show that the loop induced inflaton self-interactions can trigger a Bosenova-like explosion of inflaton stars.
Author
Francescopaolo Lopez
(SISSA, Istituto Nazionale di Fisica Nucleare)
Co-authors
Chen Sun
(ICTP)
Prof.
Takeshi Kobayashi
(SISSA)