Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2007-02-05
ECONFC0605151:0003,2006
Physics
High Energy Physics
High Energy Physics - Phenomenology
23 pages, 12 figures, LaTex for SLAC Conference Papers slac_two.rtx, Lectures given at the IPM School on Lepton and Hadron Phy
Scientific paper
The first phase of studies of the neutrino mass and mixing is essentially over. The outcome is the discovery of non-zero neutrino mass and determination of the dominant structure of the lepton mixing matrix. In some sense this phase was very simple, and nature was very collaborative with us: Two main effects - the vacuum oscillations and the adiabatic conversion in matter (the MSW-effect) - provide complete interpretation of the experimental results. Furthermore, with the present accuracy of measurements the $3\nu-$mixing analysis is essentially reduced to the $2\nu$ consideration. I will present a concise and comprehensive description of this first phase. The topics include: (i) the concept of neutrino mixing in vacuum and matter; (ii) physics of the oscillations and adiabatic conversion; (iii) the experimental evidences of the flavor transformations and determination of the oscillation parameters. Some implications of the obtained results are discussed. Comments are given on the next phase of the field that will be much more involved.
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