Another look at "just-so" solar neutrino oscillations - art. no. 011301

We take another look at "just-so" solar neutrino oscillations, characterizi ng them by the energy E-pi/2 at which the distance-varying angle is pi/2, i nstead of by the usual Delta m(2). The rising spectrum recently observed by the SuperKamiokande Collaboration is consistent with an E-pi/2 similar to 6-9 MeV and marginally with 48 MeV. The pp neutrinos must then be reduced t o one-half the standard solar model prediction, and Be-7 neutrinos must mak e up a significant part of the SAGE and GALLEX gallium signal. For E-pi/2 c lose to 9 and 48 MeV, the Be-7 neutrinos will also show a large seasonal va riation, emphasizing the importance of direct measurements of the Be-7 neut rinos. [S0556-2821(99)50213-0].