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 language | English |
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| Title of host publication | XXVI International Conference on Neutrino Physics and Astrophysics, Neutrino 2014 |
| Publisher | American Institute of Physics Inc. |
| Volume | 1666 |
| ISBN (Electronic) | 9780735413139 |
| DOIs | |
| Publication status | Published - Jul 15 2015 |
| Event | 26th International Conference on Neutrino Physics and Astrophysics, Neutrino 2014 - Boston, United States Duration: Jun 2 2014 → Jun 7 2014 |
Other
| Other | 26th International Conference on Neutrino Physics and Astrophysics, Neutrino 2014 |
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| Country | United States |
| City | Boston |
| Period | 6/2/14 → 6/7/14 |
Keywords
- Neutrino oscillation
- Solar neutrino
- Water cherenkov detector
ASJC Scopus subject areas
- Physics and Astronomy(all)