Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1994-11-15
Phys.Lett.B348:124-132,1995
Physics
High Energy Physics
High Energy Physics - Phenomenology
16 pages, latex, 5 figures available upon request from Authors
Scientific paper
10.1016/0370-2693(95)00097-5
The results of all currently operating solar neutrino experiments are analyzed in the framework of the resonant neutrino spin--flavor precession scenario including the effects of neutrino mixing. Nine different profiles of the solar magnetic field are used in the calculations. It is shown that the available experimental data can be accounted for within the considered scenario. The Ga--Ge data lead to an upper limit on the neutrino mixing angle: $\sin 2\theta_0 \aprle 0.25$. One can discriminate between small mixing angle ($\sin 2\theta_0 \aprle 0.1$) and moderate mixing angle solutions by studying the solar $\bar{\nu}_{e}$ flux which is predicted to be sizeable for moderate mixing angles. The expected signals due to $\bar{\nu}_{e}$ in the SNO, Super--Kamiokande and Borexino experiments are calculated and found to be detectable for $\sin 2\theta_0 \aprge 0.1$.
Akhmedov Eugene Kh.
Lanza Antonio
Petcov Serguey T.
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