Solar 8B and hep Neutrino Measurements from 1258 Days of Super-Kamiokande Data
Abstract
Solar neutrino measurements from 1258 days of data from the Super-Kamiokande detector are presented. The measurements are based on recoil electrons in the energy range 5.0-20.0 MeV. The measured solar neutrino flux is 2.32+/-0.03\(stat\)+0.08- 0.07\(syst\)×106 cm-2 s-1, which is 45.1+/-0.5\(stat\)+1.6-1.4\(syst\)% of that predicted by the BP2000 SSM. The day vs night flux asymmetry \(Φn-Φd\)/Φaverage is 0.033+/-0.022\(stat\)+0.013-0.012\(syst\). The recoil electron energy spectrum is consistent with no spectral distortion. For the hep neutrino flux, we set a 90% C.L. upper limit of 40×103 cm-2 s-1, which is 4.3 times the BP2000 SSM prediction.
- Publication:
-
Physical Review Letters
- Pub Date:
- June 2001
- DOI:
- 10.1103/PhysRevLett.86.5651
- arXiv:
- arXiv:hep-ex/0103032
- Bibcode:
- 2001PhRvL..86.5651F
- Keywords:
-
- High Energy Physics - Experiment
- E-Print:
- 7 pages, 5 figures, submitted to PRL (part of this paper)