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Observable majoron emission in neutrinoless double beta decay

1992; Elsevier BV; Volume: 291; Issue: 1-2 Linguagem: Inglês

10.1016/0370-2693(92)90126-o

1873-2445

Zurab Berezhiani, A. Yu. Smirnov, J. W. F. Valle,

Dark Matter and Cosmic Phenomena

We consider a class of simplest majoron models where neutrino-majoron couplings can be in the range g∼ 10−5−10−3, leading to the observability of neutrinoless double beta decay with majoron emission. The majoron is a singlet (or mostly a singlet) of the electroweak SU(2)⊗U(1) gauge symmetry, thus avoiding conflict with the LEP data on Z-decay, which rules out the triplet and doublet majoron models. Some aspects of the phenomenology of such models are discussed.