2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/45985A new theory of thermal history after inflation is outlined by taking into account the effect of parametric resonance caused by inflaton oscillation. A typical outcome is existence of a high temperature phase, that makes possible GUT baryogenesis consistently with low enough gravitino abundance.9 pagesHigh Energy Physics - Phenomenologytext