TY - JOUR
T1 - Production of massive fermions at preheating and leptogenesis
AU - Giudice, Gian Francesco
AU - Riotto, Antonio
AU - Tkachev, Igor
AU - Peloso, Marco
PY - 1999
Y1 - 1999
N2 - We present a complete computation of the inflaton decay into very massive fermions during preheating, including back-reaction effects. 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.
AB - We present a complete computation of the inflaton decay into very massive fermions during preheating, including back-reaction effects. 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.
KW - Baryogenesis
KW - Cosmology of Theories beyond the SM
KW - Physics of the Early Universe
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U2 - 10.1088/1126-6708/1999/08/014
DO - 10.1088/1126-6708/1999/08/014
M3 - Article
AN - SCOPUS:33645904853
SN - 1029-8479
VL - 3
SP - XXIV-29
JO - Journal of High Energy Physics
JF - Journal of High Energy Physics
IS - 8
ER -