Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Narrow Width of Penta-Quark Baryons in QCD String Theory   Using the QCD string theory, we investigate the physical reason of the narrow
width of penta-quark baryons in terms of the large gluonic-excitation energy.
In the QCD string theory, the penta-quark baryon decays via a gluonic-excited
state of a baryon and meson system, where a pair of Y-shaped junction and
anti-junction is created. On the other hand, we find in lattice QCD that the
lowest gluonic-excitation energy takes a large value of about 1 GeV. Therefore,
in the QCD string theory, the decay of the penta-quark baryon near the
threshold is considered as a quantum tunneling process via a highly-excited
state (a gluonic-excited state), which leads to an extremely narrow decay width
of the penta-quark system.

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The categories of this paper are: quant-ph
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The categories of this paper are: econ
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The categories of this paper are: hep-lat
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The categories of this paper are: q-fin
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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: mtrl-th
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The categories of this paper are: hep-ex
32
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: patt-sol
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The categories of this paper are: nucl-th
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The categories of this paper are: cond-mat
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The categories of this paper are: cs
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The categories of this paper are: plasm-ph
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The categories of this paper are: gr-qc