A modified version of the CKKW matrix element merging algorithm is presented,suitable for use in an angular-ordered parton shower, using truncated showersand forced splittings. The algorithm is implemented in the Herwig++ Monte Carloevent generator for the benchmark process e+e- -> hadrons. Results arepresented at parton and hadron levels, demonstrating a smooth merging betweenthe matrix elements and parton shower and an improved description of LEP data. Comment: 32 pages, 36 figures
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机译：提出了CKKW矩阵元素合并算法的改进版本，适用于使用截断淋浴器和强制劈裂的角序parton淋浴器。该算法在Herwig ++ Monte Carloevent生成器中实现，用于基准过程e + e->强子。结果以parton和强子水平表示，证明了矩阵元素和parton淋浴器之间的平滑融合以及对LEP数据的改进描述。评论：32页，36位数字
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