Conveners
Parallel Session B. Leptogenesis
- Mikhail SHAPOSHNIKOV (EPFL)
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Prof. Serguey Petcov (SISSA)11/12/2008, 17:00LeptogenesisThe CP-violation necessary for the generation of the baryon asymmetry of the Universe $Y_B$ in ``flavoured'' leptogenesis scenario can arise from the ``low energy'' PMNS neutrino mixing matrix $U$ and/or from the ``high energy'' part of neutrino Yukawa couplings, which can mediate CP-violating phenomena only at some high energy scale. In the proposed talk i) the possibility that the...Go to contribution page
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Oscar M. Vives Garcia (U. Valencia)11/12/2008, 17:25LeptogenesisWe prove that taking correctly into account the lepton flavour dependence of the $CP$ asymmetries and washout processes, it is possible to obtain successful thermal leptogenesis from the decays of the second right-handed neutrino. The asymmetries in the muon and tau-flavour channels are then not erased by the inverse decays of the lightest right-handed neutrino, $N_1$. In this way, we...Go to contribution page
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Mr Emiliano Molinaro (S.I.S.S.A.)11/12/2008, 17:50LeptogenesisThe effects of the lightest neutrino mass in ``flavoured'' leptogenesis are investigated in the case when the CP-violation necessary for the generation of the baryon asymmetry of the Universe is due exclusively to the Dirac and/or Majorana phases in the neutrino mixing matrix U. The type I see-saw scenario with three heavy right-handed Majorana neutrinos having hierarchical spectrum is...Go to contribution page
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Dr Diego Aristizabal (LNF (INFN))11/12/2008, 18:10We study variations of the standard leptogenesis scenario that can arise if an additional mass scale related to the breaking of some new symmetry (as for example a flavor or the B-L symmetry) is present below the mass $M_{N_1}$ of the lightest right-handed Majorana neutrino. Our scheme is inspired by U(1) models of flavor \`a la Froggatt-Nielsen, and involves new vectorlike heavy fields $F$....Go to contribution page