Solar results from Super-Kamiokande

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7 Citations (Scopus)

Abstract

The recent results of solar neutrino measurement from the Super-Kamiokande (SK) are presented. SK has four phases (SK-I to IV) since starting the operation in 1996. Thanks to the background reduction, the lowering energy threshold (3.5MeV) has achieved in SK-IV. The 4504 days of data of all the phases were combined for the analysis. More than 70,000 solar neutrino signal were totally observed, and no long term flux time variation was seen. The night flux was 3-4% higher than day flux, and it was the first indication of the neutrino oscillation of the matter effect of the earth at 3 sigma level. No significant distortion of the energy spectrum was seen. The precise neutrino oscillation analysis using SK data and the global analysis of solar and KamLAND reactor data were carried out. The obtained global neutrino oscillation parameters were determined as Δm212=7.50×10-5 eV2 and sin2 θ12 = 0.308.

Original languageEnglish
Title of host publicationXXVI International Conference on Neutrino Physics and Astrophysics, Neutrino 2014
PublisherAmerican Institute of Physics Inc.
Volume1666
ISBN (Electronic)9780735413139
DOIs
Publication statusPublished - Jul 15 2015
Event26th International Conference on Neutrino Physics and Astrophysics, Neutrino 2014 - Boston, United States
Duration: Jun 2 2014Jun 7 2014

Other

Other26th International Conference on Neutrino Physics and Astrophysics, Neutrino 2014
CountryUnited States
CityBoston
Period6/2/146/7/14

Keywords

  • Neutrino oscillation
  • Solar neutrino
  • Water cherenkov detector

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Koshio, Y. (2015). Solar results from Super-Kamiokande. In XXVI International Conference on Neutrino Physics and Astrophysics, Neutrino 2014 (Vol. 1666). [090001] American Institute of Physics Inc.. https://doi.org/10.1063/1.4915566