Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2001-11-09
Physics
High Energy Physics
High Energy Physics - Phenomenology
11 pages, 2 figures; Talk given (LB) at the XI International School: Particles and Cosmology, Baksan Valley, Kabardino-Balkari
Scientific paper
We propose a baryo- and leptogenesis mechanism in which the B-L asymmetry is produced in the conversion of ordinary leptons into particles of some depleted hidden sector. In particular, we consider the lepton number violating reactions, l Higgs -> l' Higgs', \bar{l'} \bar{Higgs'}, mediated by the heavy Majorana neutrinos N of the seesaw mechanism, where l and Higgs are ordinary lepton and Higgs doublets and l', Higgs' the ``sterile'' leptons and Higgs. This mechanism can operate even if the reheat temperature is smaller than the N Majorana masses, in which case the usual leptogenesis mechanism through N decays is ineffective. In particular, the reheat tempearture can be as low as 10^9 GeV or less.
Bento Luis
Berezhiani Zurab
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