Charged majoron emission in neutrinoless double beta decay

We examine in detail the predictions of the charged majoron model, introduced recently by Burgess and Cline, for 0+ → 0+ ββ transitions. The relevant nuclear matrix elements are evaluated, within the quasiparticle random phase approximation, for 76Ge, 82Se, 100Mo, 128Te and 150Nd nuclei. The calculated transition rates turn out to be much smaller than the experimental upper limits on possible majoron emission, except in a small region of the modelʹs parameter space.