Interactions of a neutrino with an extremely light scalar

Abstract

An extremely light scalar weakly interacting with light neutrinos has interesting consequences in stellar evolution, neutrino oscillations and laboratory neutrino mass measurements. In this paper we construct realistic gauge models for such scalar-neutrino interactions.

Comments: This replacement contains, in order, the Erratum and corrigendum to the paper published in Phys. Lett. B444, 75(1998), and the original published verion. Several errors in section III and IV are corrected. 13 pages, Revtex