Role of the spin-flip flavour mechanism in the solar neutrino deficit

Details Role of the spin-flip flavour mechanism in the solar neutrino deficit Role of the spin-flip flavour mechanism in the solar neutrino deficit

Nov 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990phlb..251..305p&link_type=abstract

Physics Letters B, Volume 251, Issue 2, p. 305-310.

Physics

3

Scientific paper

The neutrino deficit reported by the three solar neutrino experiments (Homestake, Kamiokande II and Baksan) is examined in the light of the resonant spin-flip flavour mechanism. It is found that the strong suppression recently observed by the Baksan group along with the ~50% deficit from Homestake and Kamiokande II implies, for the neutrino flavour mass difference Δ2m21=(0.5-1.5) × 10-8eV2, and for the magnetic moment a lower bound μ>~6×10-12ωB. A magnetic B=105G is assumed in the solar neutrino production zone and through the radiation zone, decreasing then linearly along the convection zone. A change in B has the main effect of modifying the lower bound on μ by the same proportion. A possible anticorrelation between neutrino flux and solar activity is not apparent.

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