Addendum to: Model-dependent and -independent implications of the first Sudbury Neutrino Observatory results

Abstract

In the light of recent experimental and theoretical improvements, we review our previous model-independent comparison [hep-ph/0106247] of the Super-Kamiokande (SK) and Sudbury Neutrino Observatory (SNO) solar neutrino event rates, including updated values for the ``equalized'' SK datum and for the reference Standard Solar Model (SSM) B neutrino flux. We find that the joint SK+SNO evidence for active neutrino flavor transitions is confirmed at the level of 3.3 standard deviations, independently of possible transitions to sterile states. Barring sterile neutrinos, we estimate the 3-sigma range for the ${}^8$B neutrino flux (normalized to SSM) as f_B=0.96 +0.54-0.55. Accordingly, the 3-sigma range for the energy-averaged nu_e survival probability is found to be <P_ee> = 0.31 +0.55-0.16, independently of the functional form of P_ee. An increase of the reference nu_e + d --> p + p + e cross section by ~3%, as suggested by recent theoretical calculations, would slightly shift the central values of f_B and of <P_ee> to ~1.00 and ~0.29, respectively, and would strengthen the model-independent evidence for nu_e transitions into active states at the level of ~3.6 sigma.

6 pages + 2 figures. Addendum to hep-ph/0106247

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Cited by in corpus (4)

• Getting the most from the statistical analysis of solar neutrino oscillations
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• Can a CPT Violating Ether Solve ALL Electron (Anti)Neutrino Puzzles?
• Active neutrino Oscillations and the SNO neutral Current measurement