Decay eta'→ etaππ in the (6,6*)+(6*,6) model of chiral-symmetry breaking

Assuming that the chiral-symmetry-breaking Hamiltonian belongs to the (6,asciimacron6) + (asciimacron6,6) representation of SU(3) SU(3), we have estimated the width Γ of the decay η^'->ηππ. For lᵤ=2 an upper limit Γ<0.44 MeV was obtained, in agreement with physical expectation and with the experimental upper limit Γ<1.3 MeV. There is no significant difference between this and the other popular models (8,8) and (3,asciimacron3) + (asciimacron3,3).