Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2000-05-05
Physics
High Energy Physics
High Energy Physics - Phenomenology
11 pages, 5 .ps figures, some modifications on the tables and figures with better definition
Scientific paper
A detailed study of the solar neutrino vacuum oscillation was made taking into account three neutrino flavours and the seasonal effect. This analysis was established for a range of the mixing parameter sin^2(2\phi), that is concerned with the electron-tau neutrino oscillations, from 0 to 1. We obtained the allowed mass regions versus mixing angles by fitting only the rates of the five solar neutrino detectors in activity and we compared with the fits including the recoil-electron spectrum of the Kamiokande and Super-Kamiokande experiments. The averaged survival probabilities for electron neutrinos as a function of the neutrino energy are also obtained, showing that the solutions for sin^2(2\phi) greater than 0.50 with the maximum exclusion of Be7 neutrinos and the minimum exclusion of pp neutrinos give a better explanation for the suppression rates of all detectors.
Lima C. E. C.
Portella Helio Manoel
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