2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/81482I describe the current status of the solar neutrino problem, summarizing the arguments that its resolution will require new particle physics. The phenomenon of matter-enhanced neutrino oscillations is reviewed. I consider the implications of current experiments -- including the SuperKamiokande atmospheric and LSND measurements -- and the need for additional constraints from SNO and other new detectors.Reference corrected in this replacementNuclear TheoryAstrophysicsHigh Energy Physics - Phenomenologytext