We consider a class of simplest Majoron models where neutrino- majoron couplings can be in the range $g \sim 10^{ -5}-10^{ -3}$ leading to the observability of neutrinoless double beta decay with majoron emission. The majoron is a singlet of the electroweak gauge symmetry, thus avoiding conflict with the LEP data on Z decay, which rules out the triplet and doublet majoron models.
Categories: hep-ph