Production of Massive Fermions at Preheating and Leptogenesis

1999/05/04 by G. F. Giudice, M. Peloso, A. Riotto +1 · 1 citation
Physics and Astronomy · #hep-ph #astro-ph

paper · pdf · doi:10.1088/1126-6708/1999/08/014

published as JHEP 9908 (1999) 014 · 29 pages, 4 figures

arxiv created 1999/05/04 · arxiv updated 2009/11/30

Abstract

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 10¹⁷-10¹⁸ 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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