Leptogenesis from Parametric Resonance

Details Leptogenesis from Parametric Resonance Leptogenesis from Parametric Resonance

Feb 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006fuin.conf..224c&link_type=abstract

FUNDAMENTAL INTERACTIONS. Proceedings of the 20th Lake Louise Winter Institute. Held 20-26 February 2005 in Lake Louise, Alberta

Physics

Scientific paper

The concordance of experimental observations on neutrino oscillations strongly favours the existence of neutrino mass. The supersymmetric see-saw mechanism not only provides neutrinos with light masses, but also supplies a natural mechanism for leptogenesis and hence the baryon asymmetry of the universe. CP violating effects in the lepton sector can produce a lepton asymmetry that becomes transferred to the baryon sector via sphaleron reprocessing. We will show from preliminary investigations that non-perturbative resonant production of sneutrino singlets from coherent inflaton decay can generate the BAU while avoiding the gravitino reheat bounds, even in the event that the sneutrino singlets are heavier than the infiaton mass (≳1012 GeV) and Hubble dilution effects are ignored.

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