Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Heavy Hybrid Spectrum from NRQCD and the Born-Oppenheimer
  Approximation   The spectrum of heavy-quark hybrids is studied in the leading
Born-Oppenheimer (LBO) approximation and using leading-order NRQCD simulations
with an improved gluon action on anisotropic lattices. The masses of four
hybrid states are obtained from our simulations for lattice spacings 0.1 fm and
0.2 fm and are compared to the LBO predictions obtained using
previously-determined glue-excited static potentials. The consistency of
results from the two approaches reveals a compelling physical picture for
heavy-quark hybrid states.

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The categories of this paper are: hep-th
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The categories of this paper are: solv-int
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The categories of this paper are: cmp-lg
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The categories of this paper are: eess
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The categories of this paper are: quant-ph
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The categories of this paper are: adap-org
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The categories of this paper are: q-alg
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The categories of this paper are: funct-an
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The categories of this paper are: chem-ph
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The categories of this paper are: math
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The categories of this paper are: comp-gas
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The categories of this paper are: q-fin
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The categories of this paper are: math-ph
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The categories of this paper are: q-bio
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The categories of this paper are: astro-ph
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The categories of this paper are: acc-phys