Solar B8 and hep Neutrino Measurements from 1258 Days of Super-Kamiokande Data

S. Fukuda et al. (Super-Kamiokande Collaboration)
Phys. Rev. Lett. 86, 5651 – Published 18 June 2001
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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)0.07+0.08(syst)×106cm2s1, which is 45.1±0.5(stat)1.4+1.6(syst)% of that predicted by the BP2000 SSM. The day vs night flux asymmetry (ΦnΦd)/Φaverage is 0.033±0.022(stat)0.012+0.013(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 40×103cm2s1, which is 4.3 times the BP2000 SSM prediction.

  • Received 19 March 2001

DOI:https://doi.org/10.1103/PhysRevLett.86.5651

©2001 American Physical Society

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Vol. 86, Iss. 25 — 18 June 2001

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