Conveners
Parallel Session B. Leptogenesis
- Mikhail SHAPOSHNIKOV (EPFL)
Prof.
Serguey Petcov
(SISSA)
11/12/2008, 17:00
Leptogenesis
The 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...
Oscar M. Vives Garcia
(U. Valencia)
11/12/2008, 17:25
Leptogenesis
We 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...
Mr
Emiliano Molinaro
(S.I.S.S.A.)
11/12/2008, 17:50
Leptogenesis
The 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...
Dr
Diego Aristizabal
(LNF (INFN))
11/12/2008, 18:10
We 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 $F$....
