TWISTING MAGNETIC-FIELD AND MULTIPLE RESONANCE MECHANISM IN THE SOLAR-NEUTRINO PROBLEM

The magnetic moment solution to the solar neutrino problem is investig ated in the context of a solar magnetic field with varying phase veloc ity on the transverse plane. This phase velocity is assumed to success ively take values which are approximately proportional to the solar de nsity, giving rise to the appearance of many resonances along the neut rino trajectory. We obtain a magnetic moment necessary for a neutrino reduction compatible with the experimental situation in the range (6-7 ) x 10(-13)mu(B), an improvement by a factor of 4-6 relative to the on e resonance case under the same field conditions.