Pseudoscalar Decay Constants and eta Implies 3 pi in Chiral and 1/N Perturbation Theory

摘要

The normal and anomalous chiral Ward identities are reexamined from the point of view of chiral and 1/ perturbation theory. Constraints of psi implies eta gamma and psi implies eta' gamma and pseudoscalar two photon decays are imposed, yielding a system of six simultaneous equations. A solution for the pseudoscalar decay constants is found which is relatively insensitive to the unknown gluonic bound states. The decay eta implies 3 pi is then calculated using these results, with good agreement with recent measurements. (ERA citation 05:019755)