Anthropic predictions for neutrino masses

Abstract

It is argued that small values of the neutrino masses may be due to anthropic selection effects. If this is the case, then the combined mass of the three neutrino species is expected to be ~1eV, neutrinos causing a non-negligible suppression of galaxy formation.

Revised to match accepted PRD version. Added references, discussion of very heavy neutrinos, analytic growth factor fit. 9 pages, 4 figs. Color figs and links at http://space.mit.edu/home/tegmark/anthroneutrino.html