Recent results of the Super-Kamiokande (SK) solar neutrino measurements are presented. The main goal of SK's solar analysis is to observe the MSW effect, i.e. a solar neutrino energy spectrum distortion induced by matter in the Sun, and a day/night solar neutrino flux asymmetry induced by matter in the Earth. Thanks to the improvement of the detector's water circulation system, low energy background levels have been reduced and clear solar neutrino signals are seen for 4.0-4.5 MeV electron kinetic energies, along with some indications of a signal even down to 3.5-4.0 MeV. The combined energy spectrum and day/night solar neutrino flux from period I to period IV in SK will be presented. A global oscillation analysis has been carried out using SK-I, II, III, and IV data, and by combining these results with the results of other solar neutrino experiments as well as the KamLAND reactor neutrino experiment. The results of this global analysis will also be presented.
|Journal||Proceedings of Science|
|Publication status||Published - Jan 1 2012|
|Event||36th International Conference on High Energy Physics, ICHEP 2012 - Melbourne, Australia|
Duration: Jul 4 2012 → Jul 11 2012
ASJC Scopus subject areas