Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Violations of Local Duality in the Heavy Quark Sector   We examine the origin of possible failures of the quark-hadron local duality.
In particular, we consider a correlator of two currents comprising heavy quark
operators, and compare the evaluation by the Operator Product Expansion with
the result obtained inserting an infinite set of hadronic states, in the N_c to
infinity limit. Whereas the smeared spectral functions agree with each other,
their local behaviour is different. The difference manifests itself in the form
of a term O(Lambda/epsilon) (epsilon being the residual energy) that is not
present in the expansion in powers of Lambda/epsilon predicted by the OPE.

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The categories of this paper are: astro-ph
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The categories of this paper are: gr-qc
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The categories of this paper are: nucl-th
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The categories of this paper are: quant-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: plasm-ph
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The categories of this paper are: funct-an
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The categories of this paper are: ao-sci
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The categories of this paper are: mtrl-th
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The categories of this paper are: dg-ga
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The categories of this paper are: cond-mat
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The categories of this paper are: cmp-lg
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The categories of this paper are: atom-ph
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The categories of this paper are: math
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The categories of this paper are: nlin
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The categories of this paper are: physics