Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Neutrinoless Double Beta Decay and Neutrino Masses   Neutrinoless double beta decay is a promising test for lepton number
violating physics beyond the standard model of particle physics. There is a
deep connection between this decay and the phenomenon of neutrino masses. In
particular, we will discuss the relation between neutrinoless double beta decay
and Majorana neutrino masses provided by the so-called Schechter--Valle theorem
in a quantitative way. Furthermore, we will present an experimental cross check
to discriminate neutrinoless double beta decay from unknown nuclear background
using only one isotope, i.e., within one experiment.

27
The categories of this paper are: comp-gas
3
The categories of this paper are: physics
2
The categories of this paper are: math
22
The categories of this paper are: chao-dyn
17
The categories of this paper are: q-fin
34
The categories of this paper are: chem-ph
26
The categories of this paper are: bayes-an
30
The categories of this paper are: q-alg
20
The categories of this paper are: acc-phys
29
The categories of this paper are: funct-an
35
The categories of this paper are: mtrl-th
36
The categories of this paper are: cmp-lg
33
The categories of this paper are: plasm-ph
25
The categories of this paper are: patt-sol
4
The categories of this paper are: cond-mat
12
The categories of this paper are: nucl-th