If your browser has problems viewing the above (it should work with Chrome), you can view the article as pdf below, or download the pdf file here MSW osc solar standard equation
The above article demonstrates that the standard neutrino oscillation formula is inappropriate for the calculation of flavor change probabilities for solar neutrino above approximately 420 keV. We provide an appropriate formula (an equation which will properly calculate solar neutrino transition probabilities) and discussion at MSW graph 1