Some Tests of Relativistic SU(6) Schemes

The problem of generalizing SU(6)-symmetry notions to the relativistic domain has provoked widespread discussion recently, pro and con [1]. It is now believed, rather generally, that any attempt to directly join the Poincaré group to an internal-symmetry group must lead to physical catastrophe, hence that any generalization of SU(6) can at best only represent some sort of approximation to dynamics. Whatever the formal situation may prove to be, for practical purposes one is ultimately interested in symmetry notions, "broken" or otherwise, which are directly applicable to effective S-matrix elements at some decent level of approximation. The successes achieved so far for SU(6) have after all spring from such direct applications. We are concerned here with such direct tests.