منابع مشابه
The See - Saw Mechanism , Neutrino Yukawa Couplings ,
The LFV charged lepton decays µ → e+γ, τ → e+γ and τ → µ+γ and thermal leptogenesis are analysed in the MSSM with seesaw mechanism of neutrino mass generation and soft SUSY breaking with universal boundary conditions. The case of hierarchical heavy Majorana neutrino mass spectrum, M 1 ≪ M 2 ≪ M 3 , is investigated. Leptogenesis requires M 1 > ∼ 10 9 GeV. Considering the natural range of values ...
متن کاملThe see-saw mechanism: neutrino mixing, leptogenesis and lepton flavor violation
Abstract. The see-saw mechanism to generate small neutrino masses is reviewed. After summarizing our current knowledge about the low energy neutrino mass matrix we consider reconstructing the see-saw mechanism. Low energy neutrino physics is not sufficient to reconstruct see-saw, a feature which we refer to as “see-saw degeneracy”. Indirect tests of see-saw are leptogenesis and lepton flavor vi...
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I introduce and sketch the main features of those see-saw models 1 where a large atmospheric mixing can be achieved starting from nearly diagonal matrices for charged leptons, Dirac neutrinos and Majorana right-handed neutrinos. It turns out that these models can be realized in Grand Unified Theories and they are well compatible with the related phenomenology of fermion masses and mixings.
متن کاملType II See–Saw Mechanism, Deviations from Bimaximal Neutrino Mixing and Leptogenesis
A possible interplay of both terms in the type II see–saw formula is illustrated by presenting a novel way to generate deviations from exact bimaximal neutrino mixing. In type II see–saw mechanism with dominance of the non–canonical SU(2)L triplet term, the conventional see–saw term can give a small contribution to the neutrino mass matrix. Nevertheless, if the triplet term corresponds to the b...
متن کاملHierarchical Matrices in the See-Saw Mechanism, large Neutrino Mixing and Leptogenesis
We consider the see–saw mechanism for hierarchical Dirac and Majorana neutrino mass matrices mD and MR, including the CP violating phases. Simple arguments about the structure of the neutrino mass matrix and the requirement of successful leptogenesis lead to the situation that one of the right–handed Majorana neutrinos is much heavier than the other two, which in turn display a rather mild hier...
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 1998
ISSN: 0370-2693
DOI: 10.1016/s0370-2693(98)01113-7