Production of Massive Fermions at Preheating and Leptogenesis

摘要: We present a complete computation of the inflaton decay into very massive fermions during preheating, including back-reaction effects. show that heavy are produced efficiently up to masses order 1017-1018 GeV; accessible mass range is thus even broader than one for bosons. apply our findings leptogenesis scenario, proposing new version it, in which right-handed neutrinos, responsible generation baryon asymmetry, preheating. also discuss other production mechanisms neutrinos early Universe, identifying neutrino parameters observed asymmetry reproduced.