Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Supersymmetry and Neutrinoless Double Beta Decay   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.

14
The categories of this paper are: math-ph
3
The categories of this paper are: physics
10
The categories of this paper are: q-bio
35
The categories of this paper are: mtrl-th
27
The categories of this paper are: comp-gas
9
The categories of this paper are: nlin
30
The categories of this paper are: q-alg
1
The categories of this paper are: cs
4
The categories of this paper are: cond-mat
16
The categories of this paper are: stat
13
The categories of this paper are: quant-ph
36
The categories of this paper are: cmp-lg
22
The categories of this paper are: chao-dyn
18
The categories of this paper are: econ
26
The categories of this paper are: bayes-an
8
The categories of this paper are: hep-ex