STATUS AND PROSPECTS OF MSW AND VACUUM OSCILLATION SOLUTIONS OF THE SOLAR-NEUTRINO PROBLEM

The current interpretation of the solar neutrino problem in terms of M SW or vacuum oscillations depends significantly on the absolute neutri no fluxes, i.e., on solar model calculations. However, second-generati on experiments such as SuperKamiokande, SNO, and Borexino, will be abl e to test these neutrino oscillation solutions independently of solar models. We discuss the theoretical estimates and the likely experiment al uncertainties of several model-independent observables that can pro vide unmistakable signals of neutrino oscillations.