Seesaw mechanism and the neutrino mass matrix

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dc.creatorAkhmedov, E. Kh.
dc.date2000-01-05
dc.date.accessioned2026-07-07T10:51:58Z
dc.date.available2026-07-07T10:51:58Z
dc.descriptionThe 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 channel of the atmospheric neutrino oscillations can be naturally obtained and that this constrained seesaw mechanism favours the normal mass hierarchy for the light neutrinos leading to a small $U_{e3}$ entry of the lepton mixing matrix and a mass scale of the lightest right handed neutrino $M\simeq 10^{10} - 10^{11}$ GeV. Any of the three main neutrino oscillation solutions to the solar neutrino problem can be accommodated. The inverted mass hierarchy and quasi-degeneracy of neutrinos are disfavoured in our scheme.
dc.descriptionLaTeX, 3 pages, no figures. Talk given at 6th International Workshop on Topics in Astroparticle and Underground Physics (TAUP 99), September 6-10, 1999, Paris, France
dc.identifierhttps://arxiv.org/abs/hep-ph/0001041
dc.identifierhttp://arxiv.org/abs/hep-ph/0001041
dc.identifierNucl.Phys.Proc.Suppl.87:321-323,2000
dc.identifierdoi:10.1016/S0920-5632(00)00692-7
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/185004
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectAstrophysics
dc.subjectHigh Energy Physics - Experiment
dc.titleSeesaw mechanism and the neutrino mass matrix
dc.typetext

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