Production of massive fermions at preheating and leptogenesis | Zendy

Gian F. Giudice | Zendy; Antonio Riotto | Zendy; I. Tkachev | Zendy; Marco Peloso | Zendy

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Production of massive fermions at preheating and leptogenesis

Author(s) -

Gian F. Giudice,

Antonio Riotto,

I. Tkachev,

Marco Peloso

Publication year - 1999

Publication title -

journal of high energy physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.998

H-Index - 261

eISSN - 1126-6708

pISSN - 1029-8479

DOI - 10.1088/1126-6708/1999/08/014

Subject(s) - leptogenesis , baryon asymmetry , physics , particle physics , neutrino , fermion , inflaton , asymmetry , production (economics) , boson , nuclear physics , inflation (cosmology) , theoretical physics , lepton , electron , economics , macroeconomics

We present a complete computation of the inflaton decay into very massivefermions during preheating. We show that heavy fermions are produced veryefficiently up to masses of order 10^{17}-10^{18} GeV; the accessible massrange is thus even broader than the one for heavy bosons. We apply our findingsto the leptogenesis scenario, proposing a new version of it, in which themassive right-handed neutrinos, responsible for the generation of the baryonasymmetry, are produced during preheating. We also discuss other productionmechanisms of right-handed neutrinos in the early Universe, identifying theneutrino mass parameters for which the observed baryon asymmetry is reproduced.Comment: 29 pages, 4 figure

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