CCAST, World Lab, Beijing 100080, Peoples R China
; CAS, Inst High Energy Phys, Beijing 100049, Peoples R China
Article; Proceedings Paper
Relativistic effects in two photon decay of 0(-+) quarkonium are investigated with a relativistic phenomenological approach. Comparing with the non-relativistic approximation, the relativistic phenomenological approach gives corrections coming from three sources: q (q) over bar relative momentum distribution, q (q) over bar relative energy distribution and description of quark spinors in the meson. These relativistic effects are studied in detail for cc and ss systems.