Comment on the Light-Heavy Majorana Neutrino Mechanism in No-Neutrino Double beta Decay

摘要

We review the cancellation mechanism between light and heavy neutrinos in no-neutrino double beta decay, and the limits on the mass and mixing angle for the heavy neutrino. We emphasize that the effective mass for no-neutrino double beta decay varies with atomic weight, being heavier the lighter the parent nucleus. A search for double beta decay in exp 48 Ca will be an excellent test of this mechanism. (ERA citation 09:023971)