Current status of the solar neutrino problem with Super-Kamiokande

We perform an updated model-independent analysis using the latest solar neutrino data obtained by ³⁷Cl and ⁷¹Ga radiochemical experiments, and most notably by a large water-Cherenkov detector SuperKamiokande with their 504 days of data taking. We confirm that the astrophysical solutions to the solar neutrino problem are extremely disfavored by the data and a low-temperature modification of the standard solar model is excluded by more than 5σ. We also propose a new way of illuminating the suppression pattern of various solar neutrino fluxes without invoking detailed flavor conversion mechanisms. It indicates that the strong suppression of ⁷Be neutrinos is no more true when the neutrino flavor conversion is taken into account.