Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Disassembling the Nuclear Matrix Elements of the Neutrinoless double
  beta Decay   In this article we analyze the nuclear matrix elements (NME) of the
neutrinoless double beta decays of the nuclei 48-Ca, 76-Ge, 82-Se, 124-Sn,
130-Te and 136-Xe in the framework of the Interacting Shell Model (ISM). We
study the relative value of the different contributions to them, such as higher
order terms in the nuclear current, finite nuclear size effects and short range
correlations, as well as their evolution with the maximum seniority permitted
in the wave functions. We discuss also the build-up of the NME's as a function
of the distance between the decaying neutrons. We calculate the decays to final
0+ first excited states and find that these decays are at least 25 times more
supressed with respect to the ground state to ground state transition.

25
The categories of this paper are: patt-sol
4
The categories of this paper are: cond-mat
17
The categories of this paper are: q-fin
15
The categories of this paper are: nucl-ex
13
The categories of this paper are: quant-ph
33
The categories of this paper are: plasm-ph
10
The categories of this paper are: q-bio
11
The categories of this paper are: hep-lat
21
The categories of this paper are: adap-org
30
The categories of this paper are: q-alg
6
The categories of this paper are: astro-ph
27
The categories of this paper are: comp-gas
32
The categories of this paper are: atom-ph
29
The categories of this paper are: funct-an
18
The categories of this paper are: econ
20
The categories of this paper are: acc-phys