Υ ( 1S)的强衰变及粲重子结构的研究

A Study of the Charm-Baryonic Structure from Υ(1S) Decays

在微拢QCD框架内,利用重子结构的夸克模型,计算了Υ→pp,ΛcΛc,∑c∑-c,ΞcΞc,Ξ+ccΞ-cc,ΩcccΩccc衰变的分支比,讨论了在Υ衰变中寻找Ωccc粲重子的可能性.

In the framework of perturbative QCD, the exclusive decays Υ→B(B:baryon) are studied.With the constituent quark model describing the charm-baryonic structure, we calculate the decay widths for Υ→p, Λ_c_c, Σ_c_c, Ξ_c_c, Ξ+_~cc -_~cc , Ω_~ccc _~ccc , and discuss the prospect to search for the charm baryon Ω_~ccc in Υ decays.