Chiral Suppression and SU(3) Symmetry in Scalar Glueball Decays

We theoretically evaluate the decay rates of a scalar glueball up to the order O(α_s), where only two Feynman diagrams contribute and a special attention is paid on possible flavour SU(3) symmetry breaking in the process. It is
concluded that the SU(3) flavour symmetry may be respected in any case. However, due to chiral suppression in G₀→qq, Γ(G₀→qq qq) very likely is larger than Γ(G₀→qq). These results are supported by the experimental data on the decays of χ_c0(1P) (0⁺⁺). Based on this result, we propose a criterion to identify the scalar glueball.