标题： 部分子和双极子QCD级联中的多重性 显示英文标题

标题： Multiplicities in Parton and Dipole QCD Cascades

摘要： QCD级联中多重性的演化方程，无论是部分子还是二极管图像，都可以用来估计超出修正的领先对数近似（MLLA）形式精度的修正。 两种图像之间的差异以及其他超出一阶MLLA修正的不确定性在此进行了详细研究。 例如，我讨论了一些颜色抑制的修正，这些修正在缺乏对非微扰QCD更好了解的情况下无法确定，它们与颜色重新连接的问题有关。 还提出了一个适用于二极管级联的广义演化方程。 显示英文摘要

摘要： Evolution equations for multiplicities in QCD cascades can, both in the parton and dipole picture, be used to estimate corrections beyond the formal accuracy of the modified leading log approximation (MLLA). The differences between the two pictures, and other uncertainties beyond first order MLLA corrections, are here investigated in some detail. For example, I discuss how some colour suppressed corrections, which cannot be determined without better knowledge of non-perturbative QCD, are related to the question of colour reconnection. A generalized evolution equation for the dipole cascade is also presented.