Abstract
It is shown that gauge theories give contributions to neutrinoless double- decay [] which are not covered by the standard parametrizations. While probably small, their existence raises the question of whether the observation of implies the existence of a Majorana mass term for the neutrino. For a "natural" gauge theory we argue that this is indeed the case.
- Received 14 December 1981
DOI:https://doi.org/10.1103/PhysRevD.25.2951
©1982 American Physical Society