4-11 July 2012
Melbourne Convention and Exhibition Centre
Australia/Melbourne timezone
ICHEP2012 - 36th International Conference for High Energy Physics

Solar neutrino results from Super-Kamiokande

6 Jul 2012, 09:45
15m
Room 220 (Melbourne Convention and Exhibition Centre)

Room 220

Melbourne Convention and Exhibition Centre

Melbourne Australia

Speaker

Dr Yusuke Koshio (Kamioka observatory ICRR University of Tokyo (JP))

Description

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 even for 4.0-4.5MeV electron kinetic energy range, along with some indications of a signal even down to 3.5-4.0MeV. The combined energy spectrum and day/night solar neutrino flux from phase I to phase IV in SK will be presented. A global oscillation analysis has been carried out using SK-I, II, III, and IV data and combining these results with the results of other solar neutrino experiments as well as the KamLAND reactor experiment. The results of this global analysis will also be presented.

Primary author

Dr Yusuke Koshio (Kamioka observatory ICRR University of Tokyo (JP))

Presentation materials