e^+e^-→q■g及Y→3g碎裂的色弦结构

The Structures of Colour String for e^+ e^-→qqg and Y→3g

Lund模型对e^+e^-→q(?)g→3jets及(?)→3g→h′s的解释,是把Lund弦碎裂用到他们对这两系统假定的色弦结构上,本文直接从这些系统的颜色波函数出发,用QCD全面分析了它们的色弦结构,并揭示了Lund模型采用的色弦结构图象的合理与近似程度。

In Lund model, the explanation of e^+e^-→qqg→3 jets and Υ→3g→h's is based on applying Lund string fragmentation model to their assumed structures of colour string for qqg and 3g systems. In this paper, starting from the colour wave functions of qqg and 3g systems, we study these colour string structures by QCD directly. The results reveal the reasonableness and accuracy of Lund string pictures.