Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2000-11-20
Phys.Rev. D63 (2001) 073013
Physics
High Energy Physics
High Energy Physics - Phenomenology
17 pages,latex file using RevTex. 6 postscript figures. Corrected figure 2. PRD63, 73013 (2001)
Scientific paper
10.1103/PhysRevD.63.073013
We discuss the potential of SNO to constraint the four-neutrino mixing schemes favoured by the results of all neutrino oscillations experiments. These schemes allow simultaneous transitions of solar $\nu_e's$ into active $\nu_\mu$'s, $\nu_\tau$'s and sterile $\nu_s$ controlled by the additional parameter $\cos^2(\vartheta_{23}) \cos^2(\vartheta_{24})$ and they contain as limiting cases the pure $\nu_e$-active and $\nu_e$-sterile neutrino oscillations. We first obtain the solutions allowed by the existing data in the framework of the BP00 standard solar model and quantify the corresponding predictions for the CC and the NC/CC event ratios at SNO for the different allowed regions as a function of the active-sterile admixture. Our results show that some information on the value of $\cos^2(\vartheta_{23}) \cos^2(\vartheta_{24})$ can be obtained by the first SNO measurement of the CC ratio, while considerable improvement on the knowledge of this mixing will be achievable after the measurement of the NC/CC ratio.
Gonzalez-Garcia M. C.
Pena-Garay Carlos
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