ABSTRACT
The existence of two T = 0, negative-G vector mesons–one coupled to the baryon current, the other coupled to the hypercharge current–was first discussed within the framework of the vector theory of strong interactions (VTSI). Subsequently, Gell-Mann and Ne'eman have constructed a symmetry model based on the group SU(3) which can accommodate the two T = 0 vector mesons of VTSI–the meson as a member of a unitary octet and the meson as a unitary singlet. The chapter shows that the preliminary data of the Brookhaven-Syracuse group are, within limited statistics, consistent with the absence of the decay mode. It suggests that the discrepancy is due to mixing between ω and φ arising from the fact that the ω and φ have the same quantum numbers as far as spin-parity, isospin, and G-parity are concerned.
