A Natural Explanation of Be/B Neutrino Flux Anomaly in the RSFP Scenario

Abstract

Recent solar neutrino data reveal a serious anomaly in the relative neutrino fluxes from different steps in the chain of thermonuclear reactions responsible for energy generation in the stars. Boron-8 neutrinos generated at the end of the chain are observed whereas hardly any Be-7 neutrinos generated at an intermediate stage of this chain are seen. This almost rules out an astrophysical solution of the solar neutrino puzzle. The only apparent way to save the whole logic of thermonuclear chain reactions occuring inside the stars is to invoke non-standard neutrino physics. In this work the Be/B neutrino flux anomaly has been examined within the framework of Resonant Spin Flavour Precession (RSFP) scenario. It is found that the survival probability for electronic neutrinos in the RSFP scenario has just the right dependence on neutrino energy to explain the Be-neutrino deficit for a suitable range of transverse solar magnetic field.