Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The nature of massive neutrinos and multiple mechanisms in neutrinoless
  double beta decay   Determining the nature -Dirac or Majorana- of massive neutrinos is one of the
most pressing and challenging problems in the field of neutrino physics. We
discuss how one can possibly extract information on the couplings, if any,
which might be involved in neutrinoless double beta-decay using a multi-isotope
approach. We investigate as well the potential of combining data on the
half-lives of nuclides which largely different Nuclear Matrix Elements such as
$^{136}$Xe and of one or more of the four nuclei $^{76}$Ge, $^{82}$Se,
$^{100}$Mo and $^{130}$Te, for discriminating between different pairs of
non-interfering or interfering mechanisms of neutrinoless double beta-decay.
The case studies do not extend to the evaluation of the theoretical
uncertainties of the results, due to the nuclear matrix elements calculations
and other causes.

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The categories of this paper are: q-fin
21
The categories of this paper are: adap-org
35
The categories of this paper are: mtrl-th
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The categories of this paper are: chem-ph
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The categories of this paper are: hep-th
16
The categories of this paper are: stat
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The categories of this paper are: solv-int
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The categories of this paper are: econ
10
The categories of this paper are: q-bio
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The categories of this paper are: atom-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: alg-geom
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The categories of this paper are: nlin
5
The categories of this paper are: gr-qc
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The categories of this paper are: math-ph
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The categories of this paper are: hep-lat