Neutrinos in stochastic media: From sun to core-collapse supernovae

Abstract

Recent work on neutrino propagation in stochastic media and its implications for the Sun and corecollapse supernovae are reviewed. It is shown that recent results from Sudbury Neutrino Observatory and SuperKamiokande combined with a best global fit value of δm 2 = 5 × 10 −5 eV 2 and tan 2 θ = 0.3 rule out solar electron density fluctuations of a few percent or more. It is argued that solar neutrino experiments may be able to rule out even smaller fluctuations in the near future.