Does SU-3 give predictions for the new mesons decays

The violation of SU-3 predictions for decays of PSI and CHI mesons due to the mass differences of the final particles is discussed. The usual explicit mass dependence in the form Ksup(2l+1) is inapplicable if several independent structures contribute to the matrix elements (e.g. γsub(μ) and sigmasub(μν)qsub(ν) for PSI → B antiB). Depending on relative values of different terms in the decay amplitude the mass corrections to the SU-3 relations can vary up to several times giving the same anbiguity to the theoretical predictions. Taking this into account, two-and three-body decays of PSI and CHI mesons are discussed. For several decays unambiguous predictions can be made