On Prospects for Exploration of Supersymmetry in Double Beta Decay Experiments.

We analyze constraints on the parameters of the Rp violating supersymmetry (Rp / SUSY) which can be extracted from non-observation of the neutrinoless nuclear double beta decay (0νββ) at a given halflife lower bound. Our analysis covers a large class of phenomenologically viable Rp / SUSY models. We introduce special characteristics: the SUSY sensitivity of a ββ-decaying isotope and the SUSY reach of a 0νββ-experiment. The former provides a physical criterion for a selection of the most promising isotopes for SUSY searches and the latter gives a measure of success for a 0νββ-experiment in exploring the Rp / SUSY parameter space. On this basis we discuss prospects for exploration of supersymmetry in various 0νββ-experiments. 1 Observation of the neutrinoless double beta (0νββ) decay Z AY → Z+2 AY + 2e − of some nucleus Z AY would be an unambiguous signal of the physics beyond the standard model (SM) of electro-weak interactions [1], [2]. This