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How unique are the MSW parameters ?

P. K. Mohapatra

hep-pharXiv:hep-ph/9212258

Abstract

We investigate the effect of a possible large frozen-in magnetic field in the core of the sun and a neutrino magnetic moment of the order of 10-10 Bohr magneton on the MSW parameters. Such a possibility can completely depolarize the νeL resulting in a factor of half of the emitted number. This in combination with MSW can explain the present experimental data on solar neutrinos but with a different region of the parameter space than the regular MSW alone. In this scenario there is a larger region of parameter space allowed. There is a large strip of parameter space corresponding to adiabatic solution and no solution for large mixing angle region. The non-adiabatic region still remains as a solution but shifted and larger relative to the regular MSW.

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