摘要With a 15M J/ψ inclusive Monte Carlo sample, the absolute branching fraction of J/ψ→γ\η' from the J/ψ inclusive photon spectrum is measured to be Br(J/ψ→γ\η')=(4.68±0.08±0.27)×10-3, which is in good agreement with the input value. The J/ψ→γfJ(2220) is also searched for using the same sample. Under our assumptions, the statistical significances of J/ψ→γfJ(2220) are larger than 7\σ.
Abstract：With a 15M J/ψ inclusive Monte Carlo sample, the absolute branching fraction of J/ψ→γ\η' from the J/ψ inclusive photon spectrum is measured to be Br(J/ψ→γ\η')=(4.68±0.08±0.27)×10-3, which is in good agreement with the input value. The J/ψ→γfJ(2220) is also searched for using the same sample. Under our assumptions, the statistical significances of J/ψ→γfJ(2220) are larger than 7\σ.
2009, Vol. 26 
