用{ \epem }湮灭事件形状矩检验分析强子化模型
Tests of analytical hadronisation models using event shape moments in {\epem} annihilation
摘要：
强子化的分析模型，即色散模型，形状函数和单一的穿着胶子近似的预测，进行了比较与时刻的强子事件形状分布测量在\epem湮灭在14和209 GeV之间的质心能量。与强子化的蒙特卡罗模型相反，分析模型只需要调整两个通用参数，强耦合和第二个参数化非微扰修正。所提取的As值与世界平均值一致，并与以前的测量结果具有竞争力。事件形状分布的方差与这些模型中的一些给出的预测进行了比较。模型的局限性，可能是由于未知的高阶修正，证明和讨论。
英文摘要：
Predictions of analytical models for hadronisation, namely the dispersive model, the shape function and the single dressed gluon approximation, are compared with moments of hadronic event shape distributions measured in \epem annihilation at centre-of-mass energies between 14 and 209 GeV. In contrast to Monte Carlo models for hadronisation, analytical models require to adjust only two universal parameters, the strong coupling and a second quantity parametrising nonperturbative corrections. The extracted values of as are consistent with the world average and competitive with previous measurements. The variance of event shape distributions is compared with predictions given by some of these models. Limitations of the models, probably due to unknown higher order corrections, are demonstrated and discussed.
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