Supersymmetry and Neutrinoless Double Beta Decay

Details Supersymmetry and Neutrinoless Double Beta Decay Supersymmetry and Neutrinoless Double Beta Decay

1995-02-24

arxiv.org/abs/hep-ph/9502385v1

Phys.Rev. D53 (1996) 1329-1348

Physics

High Energy Physics

High Energy Physics - Phenomenology

Latex, 38 pages, plus 11 figures (660kb) submitted seperately as uuencoded Postscript file

Scientific paper

10.1103/PhysRevD.53.1329

Neutrinoless double beta decay ($\znbb$) induced by superparticle exchange is investigated. Such a supersymmetric (SUSY) mechanism of $\znbb$ decay arises within SUSY theories with R-parity non-conservation (\rp). We consider the minimal supersymmetric standard model (MSSM) with explicit \rp terms in the superpotential (\rp MSSM). The decay rate for the SUSY mechanism of $\znbb$ decay is calculated. Numerical values for nuclear matrix elements for the experimentally most interesting isotopes are calculated within pn-QRPA. Constraints on the \rp MSSM parameter space are extracted from current experimental half-life limits. The most stringent limits are derived from data on $^{76}$Ge. It is shown that these constraints are more stringent than those from other low-energy processes and are competitive to or even more stringent than constraints expected from accelerator searches.

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