Physics
Scientific paper
Aug 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986phrvd..34..969r&link_type=abstract
Physical Review D (Particles and Fields), Volume 34, Issue 4, 15 August 1986, pp.969-979
Physics
216
Quark And Lepton Masses And Mixing
Scientific paper
Mikheyev and Smirnov have observed that neutrino oscillations in the Sun can be greatly enhanced through the mechanism of Wolfenstein matter oscillations. We develop a qualitative understanding of this phenomenon in the small-mixing-angle limit and carry out extensive calculations in order to apply it to the solar-neutrino problem. Our simple theoretical model agrees remarkably well with the calculations. After determining those values of Δm2 and sin22theta in the small-mixing-angle limit for which the 8B plus 7Be neutrino capture rate in 37Cl is suppressed by a factor 2-4, we predict the corresponding capture rate for pp plus 7Be neutrinos in 71Ga. The gallium capture rate can range from no reduction to a factor of 10 reduction. We also determine the modified spectrum of 8B neutrinos arriving at Earth and discuss the importance of this spectrum as a means of choosing between oscillations and the solar model as the cause of the solar-neutrino problem, and also as a means of distinguishing between different sets of oscillation parameters.
Gelb James M.
Rosen Simon Peter
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