Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: QCD Corrections and Long-Range Mechanisms of neutrinoless double beta
  decay   Recently it has been demonstrated that QCD corrections are numerically
important for short-range mechanisms (SRM) of neutrinoless double beta decay
($0\nu\beta\beta$) mediated by heavy particle exchange. This is due to the
effect of color mismatch for certain effective operators, which leads to mixing
between different operators with vastly different nuclear matrix elements
(NMEs). In this note we analyze the QCD corrections for long-range mechanisms
(LRM), due to diagrams with light-neutrino exchange between a Standard Model
(V-A)$\times$(V-A) and a beyond the SM lepton number violating vertex. We argue
that in contrast to the SRM in the LRM case, there is no operator mixing from
color-mismatched operators. This is due to a combined effect of the nuclear
short-range correlations and color invariance. As a result, the QCD corrections
to the LRM amount to an effect no more than 60%, depending on the operator in
question. Although less crucial, taken into account QCD running makes
theoretical predictions for $0\nu\beta\beta$-decay more robust also for LRM
diagrams. We derive the current experimental constraints on the Wilson
coefficients for all LRM effective operators.

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The categories of this paper are: acc-phys
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The categories of this paper are: adap-org
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The categories of this paper are: atom-ph
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The categories of this paper are: stat
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The categories of this paper are: nlin
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The categories of this paper are: quant-ph
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The categories of this paper are: solv-int
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The categories of this paper are: mtrl-th
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The categories of this paper are: q-bio
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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: cs
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The categories of this paper are: funct-an
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The categories of this paper are: eess
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The categories of this paper are: hep-ex
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The categories of this paper are: astro-ph