Nucleosynthesis constraints on heavy tau-neutrino in the presence of annihilations to majorons

Abstract

We show that in the presence of sufficiently strong ${\nu }_{\tau }$ annihilations to majorons, primordial nucleosynthesis constraints can not rule out any values of the ${\nu }_{\tau }$ mass up the present laboratory limit.

Comments: Talk given at TAUP 95, Toledo, Sept. 1995; 5 pages, LaTex file + 2 figures, all compressed by uufiles