Neutrinos on Earth and in the Heavens

Abstract

Recent data lead us to a simple and intriguing form of the neutrino mass matrix. In particular, we find solar neutrino oscillations to be nearly maximal (and rule out the small-angle MSW explanation of solar neutrino observations) if relic neutrinos comprise at least one~percent of the critical mass density of the universe.

Comments: 7 pages, harvmac, minor changes and new references in revised version