Three-Neutrino MSW Effect and the Lehmann Mass Matrix

Abstract

Recent work on analytical solutions to the MSW equations for three neutrino flavours is reviewed, with emphasis on the exponential density. Application to a particular mass matrix, proposed by Lehmann, Newton and Wu, is also discussed. Within this model, the experimental data allow a determination of the three neutrino masses. They are found to be 0.002-0.004, 0.01 and 0.05 eV.

6 pages, LaTeX, 1 figure. Invited talk given at the conference "Beyond the Desert 2002", 2-7 June 2002, Oulu, Finland, to be published in the proceedings