Selection rules for JᵖC Exotic Hybrid Meson Decay in Large-Nc

الأصل · EN

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.