Abstract
The contributions of right-handed weak currents in neutrinoless double beta decay are studied taking explicitly into account the mass corrections to the intermediate neutrino propagator. Due to these corrections the right-handed currents become effective even if all neutrinos are light (${\mathit{m}}_{\ensuremath{\nu}}$>10 MeV). Explicit expressions for the neutrino-momentum integrals and the decay half-life are derived. As an example two neutrino-mass scenarios containing the hypothetical 17-keV neutrino are discussed. The experimental half-life of the $^{76}\ensuremath{\rightarrow}^{76}$Se decay is used to obtain an upper limit for a new kind of effective right-handed coupling within the two scenarios.
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