Matching matrix elements and shower evolution for top-pair production in hadronic collisions
Matching matrix elements and shower evolution for top-pair production in hadronic collisions
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DOI：
10.1088/1126-6708/2007/01/013
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发表时间：
2007-01-01
影响因子：
5.4
通讯作者：
Treccani, Michele
中科院分区：
文献类型：
--
作者：
Mangano, Michelangelo L.;Moretti, Mauro;Treccani, Michele
我们研究了在Tevatron和LHC强子碰撞中顶对产生的情况下多喷流矩阵元的匹配和簇射演化。我们提出了在ALPGEN蒙特卡罗发生器中实现的匹配算法的结果，并将它们与在部分子水平上获得的结果进行比较，并与MC@NLO方法的预测。我们强调的匹配算法的一致性时，适用于这些最终状态，并与MC@NLO获得最包容的数量的优秀协议。然而，我们也确定了一个显着的差异，在领先的喷流伴随着顶夸克对的快度谱，并评论这种差异的可能起源。
We study the matching of multijet matrix elements and shower evolution in the case of top-pair production in hadronic collisions at the Tevatron and at the LHC. We present the results of the matching algorithm implemented in the ALPGEN Monte Carlo generator, and compare them with results obtained at the parton level, and with the predictions of the MC@NLO approach. We highlight the consistency of the matching algorithm when applied to these final states, and the excellent agreement obtained with MC@NLO for most inclusive quantities. We nevertheless identify also a remarkable difference in the rapidity spectrum of the leading jet accompanying the top quark pair, and comment on the likely origin of this discrepancy.