A See-Saw Mechanism with light sterile neutrinos

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dc.creatorMcKellar, B. H. J.
dc.creatorStephenson Jr, G. J.
dc.creatorGoldman, T.
dc.creatorGarbutt, M.
dc.date2001-06-12
dc.date2001-07-02
dc.date.accessioned2026-07-07T03:44:45Z
dc.date.available2026-07-07T03:44:45Z
dc.descriptionThe usual see-saw mechanism for the generation of light neutrino masses is based on the assumption that all of the flavours of right-handed (more properly, sterile) neutrinos are heavy. If the sterile Majorana mass matrix is singular, one or more of the sterile neutrinos will have zero mass before mixing with the active (left-handed) neutrinos and be light after that mixing is introduced. In particular, a rank 1 sterile mass matrix leads naturally to two pseudo-Dirac pairs, one very light active Majorana neutrino and one heavy sterile Majorana neutrino. For any pattern of Dirac masses, there exists a region of parameter space in which the two pseudo-Dirac pairs are nearly degenerate in mass. This, in turn, leads to large amplitude mixing of active states as well as mixing into sterile states.
dc.description12 pages, no figures. Contributed to the XX International Symposium on Lepton and Photon Interactions at High Energies, Rome, July 2001, and to the International Europhysics Conference on High Energy Physics, Budapest, July 2001. v2: Report-no added, misprints corrected
dc.identifierhttps://arxiv.org/abs/hep-ph/0106121
dc.identifierhttp://arxiv.org/abs/hep-ph/0106121
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/40693
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectNuclear Theory
dc.titleA See-Saw Mechanism with light sterile neutrinos
dc.typetext

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