Production of Massive Fermions at Preheating and Leptogenesis

Details Production of Massive Fermions at Preheating and Leptogenesis Production of Massive Fermions at Preheating and Leptogenesis

1999-05-04

arxiv.org/abs/hep-ph/9905242v1

JHEP 9908 (1999) 014

Physics

High Energy Physics

High Energy Physics - Phenomenology

29 pages, 4 figures

Scientific paper

10.1088/1126-6708/1999/08/014

We present a complete computation of the inflaton decay into very massive fermions during preheating. We show that heavy fermions are produced very efficiently up to masses of order 10^{17}-10^{18} GeV; the accessible mass range is thus even broader than the one for heavy bosons. We apply our findings to the leptogenesis scenario, proposing a new version of it, in which the massive right-handed neutrinos, responsible for the generation of the baryon asymmetry, are produced during preheating. We also discuss other production mechanisms of right-handed neutrinos in the early Universe, identifying the neutrino mass parameters for which the observed baryon asymmetry is reproduced.

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