Exact symmetry of large N_c QCD
Abstract
QCD and QED exhibit an infinite set of three-point Green's functions that contain only OZI rule violating contributions, and (for QCD) vanish exactly in the large N_c limit. This is due to symmetrization, do not follow from any Lagrangian symmetry, and constitutes the discovery of a new symmetry principle in QCD and QED. We prove that the amplitude for a neutral hybrid {1,3,5...}^{-+} exotic current to create eta pi0 vanishes exactly for QCD in the large N_c limit. Crystal Barrel's experimental claim of a resonant 1^{-+} decaying to eta pi0 suggests that the 1^{-+} is not a hybrid meson.Keywords
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