Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Penta-quark baryon from the QCD Sum Rule   Exotic penta-quark baryon with strangeness +1, \Theta^+, is studied in the
QCD sum rule approach. We derive sum rules for the positive and negative parity
baryon states with J=1/2 and I=0. It is found that the standard values of the
QCD condensates predict a negative parity \Theta^+ of mass \simeq 1.5 GeV,
while no positive parity state is found. We stress the roles of chiral-odd
condensates in determining the parity and mass of \Theta^+.

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The categories of this paper are: acc-phys
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The categories of this paper are: cond-mat
3
The categories of this paper are: physics
33
The categories of this paper are: plasm-ph
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The categories of this paper are: chem-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: q-alg
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The categories of this paper are: mtrl-th
1
The categories of this paper are: cs
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The categories of this paper are: dg-ga
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The categories of this paper are: bayes-an
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The categories of this paper are: ao-sci
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The categories of this paper are: cmp-lg
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The categories of this paper are: chao-dyn
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The categories of this paper are: math-ph
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The categories of this paper are: solv-int