Selection rules for JPC Exotic Hybrid Meson Decay in Large-Nc
Abstract
The coupling of a neutral hybrid 1,3,5...-+ exotic particle (or current) to two neutral (hybrid) meson particles with the same JPC and J=0 is proved to be sub-leading to the usual large-Nc QCD counting. The coupling of the same exotic particle to certain two - (hybrid) meson currents with the same JPC and J=0 is also sub-leading. The decay of a 1,3,5...-+ hybrid to eta pi0, eta' pi0, eta' eta, eta(1295) pi0, pi(1300)0 pi0, eta(1440) pi0, a0(980)0 sigma or f0(980) sigma is sub-leading, assuming that these final state particles are (hybrid) mesons in the limit of large Nc.
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