Predictions of branching ratio as a function of the right-handed gauge singlet for the LOW, LMA and Vacuum solutions of the solar neutrino problem, shown in the left plot (from [74]). After the SNO and Kamland results, only a fraction of LMA solution survived, while the other solutions are completely ruled out. The line “Experimental Bound” is the limit set by the MEGA experiment in 2002 [88, 89].
