Parton distributions for LO generators
Parton distributions for LO generators
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DOI：
10.1140/epjc/s10052-008-0610-x
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发表时间：
2007-11
期刊：
影响因子：
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通讯作者：
A. Sherstnev;R. Thorne
中科院分区：
文献类型：
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作者：
A. Sherstnev;R. Thorne
我们研究了将LO部分子矩阵元与LO或NLO部分子分布相结合所得到的结果。对于矩阵元素和部分子分布，这些都与使用NLO的最好预测进行了比较。其目的是确定在只有LO矩阵元素可用的情况下，例如在许多蒙特卡罗生成器中，使用哪些部分子分布是最合适的。对于某些过程，LO和NLO部分子分布都有缺陷，有时甚至是严重的，因此提出了一种修正的最优LO集。我们研究了各种各样的过程，新的修改后的LO*PDF在几乎所有情况下都至少与LO和NLO PDF一样好，而且往往更好。
We present a study of the results obtained by combining LO partonic matrix elements with either LO or NLO parton distributions. These are compared to thebestprediction using NLO for both matrix elements and parton distributions. The aim is to determine which parton distributions are most appropriate to use in those cases where only LO matrix elements are available, e.g. as in many Monte Carlo generators. Both LO and NLO parton distributions have flaws, sometimes serious, for some processes, so a modifiedoptimalLO set is suggested. We investigate a wide variety of processes, and the new modified LO* PDF works at least as well as, and often better than, both LO and NLO PDFs in nearly all cases.