Analytic Neutrino Oscillation Probabilities in Matter: Revisited

We summarize our recent paper on neutrino oscillationprobabilities in matter, explaining the importance, relevance and need for simple, highly accurate approximations to the neutrino oscillationprobabilities in matter. Simple expressions for the neutrinomixing angles and mass squared differences in matter are given in an Appendix. Using these in the vacuum oscillationprobabilities instead of the vacuum values, gives an excellent approximation to the oscillationprobabilities in matter.