Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Decoupling Spurious Baryon States in the 1/N_c Expansion of QCD   We identify ``spurious'' states in meson-baryon scattering, those that appear
in QCD for N_c > 3 but decouple for N_c = 3. The key observation is that the
relevant flavor SU(3) Clebsch-Gordan coefficients contain factors of 1 - 3/N_c.
We show that this method works even if SU(3) is badly broken. We also observe
that resonant scattering poles lying outside naive quark model multiplets are
not necessarily large N_c artifacts, and can survive via configuration mixing
at N_c = 3.

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The categories of this paper are: cs
35
The categories of this paper are: mtrl-th
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The categories of this paper are: hep-lat
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The categories of this paper are: adap-org
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The categories of this paper are: physics
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The categories of this paper are: nucl-th
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The categories of this paper are: alg-geom
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The categories of this paper are: nucl-ex
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The categories of this paper are: eess
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The categories of this paper are: cond-mat
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The categories of this paper are: atom-ph
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The categories of this paper are: supr-con
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The categories of this paper are: acc-phys
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The categories of this paper are: econ
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The categories of this paper are: math-ph
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The categories of this paper are: q-bio