Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Arbitrary mass Majorana neutrinos in neutrinoless double beta decay   We revisit the mechanism of neutrinoless double beta (NLDBD) decay mediated
by the exchange with the heavy Majorana neutrino N of arbitrary mass mN,
slightly mixed with the electron neutrino. By assuming the dominance of this
mechanism, we update the well-known NLDBD-decay exclusion plot in the
mass-mixing angle plane taking into account recent progress in the calculation
of nuclear matrix elements within quasiparticle random phase approximation and
improved experimental bounds on the NLDBD-decay half-life of Ge-76 and Xe-136.
We also consider the known formula approximating the mN dependence of the
NLDBD-decay nuclear matrix element in a simple explicit form. We analyze its
accuracy and specify the corresponding parameters, allowing one to easily
calculate the NLDBD-decay half-life for arbitrary mN for all the experimentally
interesting isotopes without resorting to real nuclear structure calculations.

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The categories of this paper are: atom-ph
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The categories of this paper are: q-alg
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The categories of this paper are: q-bio
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The categories of this paper are: chao-dyn
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The categories of this paper are: ao-sci
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The categories of this paper are: dg-ga
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The categories of this paper are: mtrl-th
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The categories of this paper are: hep-lat
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The categories of this paper are: patt-sol
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The categories of this paper are: chem-ph
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The categories of this paper are: supr-con
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The categories of this paper are: math
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The categories of this paper are: hep-th
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The categories of this paper are: quant-ph
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The categories of this paper are: comp-gas
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The categories of this paper are: funct-an