Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quark-gluon mixed condensate of the QCD vacuum in Holographic QCD   We investigate the quark-gluon mixed condensate based on an AdS/QCD model.
Introducing a holographic field dual to the operator for the quark-gluon mixed
condensate, we obtain the corresponding classical equation of motion. Taking
the mixed condensate as an additional free parameter, we show that the present
scheme reproduces very well experimental data. A fixed value of the mixed
condensate is in good agreement with that of the QCD sum rules.

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The categories of this paper are: dg-ga
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The categories of this paper are: ao-sci
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The categories of this paper are: nlin
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The categories of this paper are: econ
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The categories of this paper are: patt-sol
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The categories of this paper are: eess
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The categories of this paper are: math
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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: math-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: atom-ph
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The categories of this paper are: hep-th
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The categories of this paper are: nucl-th
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The categories of this paper are: physics
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The categories of this paper are: nucl-ex