Seesaw mechanism and structure of neutrino mass matrix
نویسندگان
چکیده
منابع مشابه
Seesaw mechanism and structure of neutrino mass matrix
We consider the seesaw mechanism of neutrino mass generation in the light of our present knowledge of the neutrino masses and mixing. We analyse the seesaw mechanism constrained by the following assumptions: (1) minimal seesaw with no Higgs triplets, (2) hierarchical Dirac masses of neutrinos, (3) large lepton mixing primarily or solely due to the mixing in the right-handed neutrino sector, and...
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The seesaw mechanism of neutrino mass generation is analysed under the following assumptions: (1) minimal seesaw with no Higgs triplets, (2) hierarchical Dirac masses of neutrinos, (3) large lepton mixing primarily or solely due to the mixing in the right-handed neutrino sector, and (4) unrelated Dirac and Majorana sectors of neutrino masses. It is shown that large mixing governing the dominant...
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If it can be ascertained experimentally that the 3 × 3 Majorana neutrino mass matrix Mν has vanishing determinants for one or more of its 2 × 2 submatrices, it may be interpreted as supporting evidence for the theoretically well-known canonical seesaw mechanism. I show how these two things are connected and offer a realistic Mν with two zero subdeterminants as an example. It is a common theoret...
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A minimal extension of the Standard Model is proposed, where the observed lefthanded neutrinos obtain naturally small Majorana masses from a one-loop radiative seesaw mechanism. This model has two candidates (one bosonic and one fermionic) for the dark matter of the Universe. It has a very simple structure and should be verifiable in forthcoming experiments at the Large Hadron Collider. In the ...
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If the canonical seesaw mechanism alone is responsible for neutrino mass, i.e. mν ≃ −m 2 D/mN , it can neither be proved nor disproved at the TeV energy scale. A new verifiable mechanism of neutrino mass is proposed, using the inverse seesaw, with new physics at the TeV scale, such that mν ≃ m 2 DǫL/m 2 N , where ǫL is a two-loop effect. Dark-matter candidates also appear naturally. Introductio...
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ژورنال
عنوان ژورنال: Nuclear Physics B - Proceedings Supplements
سال: 2000
ISSN: 0920-5632
DOI: 10.1016/s0920-5632(00)00692-7