Reviews of topical problems

The nature of neutrino mass and the phenomenon of neutrino oscillations

 a,  b,  b
a State Research Center Institute ofHigh Energy Physics, ul. Pobedy 1, Protvino, Moscow Region, 142280, Russian Federation
b Lebedev Physical Institute, Russian Academy of Sciences, Leninsky prosp. 53, Moscow, 119991, Russian Federation

Various aspects of the neutrino mass problem are discussed in the light of existing model predictions and extensive experimental data. Generation mechanisms are considered and possible gauge-theory neutrino mass hierarchies, in particular the most popular ’flipped see-saw’ models, are discussed. Based on the currently available astrophysical data on the integral density of matter in the Universe and on the spectral anisotropy of the relic cosmic radiation, the cosmological implications of a non-zero neutrino mass are described in detail. Results from various mass-measuring methods are presented. Considerable attention is given to heavy neutrino oscillations. Oscillation mechanisms both in vacuum and in matter are considered in detail. Experiments on oscillations at low and high energies and new generation large-flight-base facilities are described. The present state of research into oscillations of solar and atmospheric neutrinos is reviewed.

Fulltext is available at IOP
PACS: 14.60.Pq, 12.15.Ff (all)
DOI: 10.1070/PU1997v040n08ABEH000272
Citation: Gershtein S S, Kuznetsov E P, Ryabov V A "The nature of neutrino mass and the phenomenon of neutrino oscillations" Phys. Usp. 40 773–806 (1997)
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:   ,   ,    «   » 167 811–848 (1997); DOI: 10.3367/UFNr.0167.199708b.0811

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