Chiral quarks, chiral limit, nonanalytic terms and baryon spectroscopy

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Abstract
It is shown that the principal pattern in baryon spectroscopy, which is associated with the flavor-spin dependent hyperfine interaction, is due to the spontaneous breaking of chiral symmetry in QCD and persists in the chiral limit. All corrections, which are associated with a finite quark (Goldstone boson) mass are suppressed by the factor $(\mu/\Lambda_\chi$)^2 and higher.

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