Leptogenesis via preheating

Marco Peloso

Research output: Contribution to journalArticle


Leptogenesis constitues a very simple scenario to achieve the baryon asymmetry that we observe today. It requires only the presence of right handed neutrinos (which arise very naturally in many extensions of the Standard Model) and depends crucially on the mechanism responsible for their production. In particular, when their mass exceeds the inflaton mass (1013 GeV in chaotic inflation) only non perturbative production can occur. It is shown here that non perturbative production of fermions in an expanding Universe is a very efficient mechanism up to masses of order of (1017 - 1018) GeV, and that it can be easily applied to solve the baryon asymmetry problem.

Original languageEnglish (US)
Pages (from-to)81-85
Number of pages5
JournalNuclear Physics B - Proceedings Supplements
Issue number1-3
StatePublished - Feb 2000

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