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19 April 2024 |
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Addendum to: Model-dependent and -independent implications of the first Sudbury Neutrino Observatory results | | G.L. Fogli
; E. Lisi
; D. Montanino
; A. Palazzo
; | | Date: |
14 Mar 2002 | | Journal: | Phys.Rev. D65 (2002) 117301 | | Subject: | hep-ph | | Affiliation: | U. of Bari & INFN, Bari), D. Montanino (U. of Lecce & INFN, Lecce), A. Palazzo (U. of Bari & INFN, Bari | | 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 = 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 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. | | Source: | arXiv, hep-ph/0203138 | | Services: | Forum | Review | PDF | Favorites | |
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