关键词: QCD反常, η'-η_c混合, B→η'X衰变

Abstract: A new approach for the (η)' (and (η))-(η)_cmixing is discussed on the basis of the axial anomaly in QCD. Through (η)'((η))-(η)_c mixing the calculated J/(ψ)->(γ)(η)' and J/(ψ)->(γ)(η) decay widths agree with experimental data. By the mixing of (η)'((η)) with excited state (η)'_c, branching ratios BR((ψ)'->(γ)(η)') = (1.8±0.9)×10^-4 and BR((ψ)'->(γ)(η)) = (3.4±1.5)×10^-5 are predicted. In particular, by the mixing between (η)' and color-octet(cc)₈ pair and b->(cc)₈s decay, the large branching ratio for B->(η)'Xdecay observed by CLEO recently may be explained.

Key words: QCD axial anomaly, (η)'-(η)_cmixing, B->, (η)'X decay