Selection rules for J^PC Exotic Hybrid Meson Decay in Large-N_c

摘要

The coupling of a neutral hybrid {1,3,5...}^-+ exotic particle (or current)to two neutral (hybrid) meson particles with the same J^PC and J=0 is proved tobe sub-leading to the usual large-N_c QCD counting. The coupling of the sameexotic particle to certain two - (hybrid) meson currents with the same J^PC andJ=0 is also sub-leading. The decay of a {1,3,5...}^-+ hybrid to eta pi^0, eta'pi^0, eta' eta, eta(1295) pi^0, pi(1300)^0 pi0, eta(1440) pi^0, a_0(980)^0sigma or f_0(980) sigma is sub-leading, assuming that these final stateparticles are (hybrid) mesons in the limit of large N_c.