Parton distribution benchmarking with LHC data
Parton distribution benchmarking with LHC data
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DOI：
10.1007/jhep04(2013)125
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发表时间：
2013-04-01
影响因子：
5.4
通讯作者：
Yuan, C. -P.
中科院分区：
文献类型：
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作者：
Ball, Richard D.;Carrazza, Stefano;Yuan, C. -P.
我们对来自 ABM、CT、HERAPDF、MSTW 和 NNPDF 合作的最新 NNLO PDF 集进行了详细比较。我们比较了低尺度和高尺度的部分子分布，以及与大型强子对撞机现象学相关的部分光度分布。我们研究了在实验协方差矩阵可用的情况下，LHC 基准包含截面和电弱玻色子和射流产生的微分分布的 PDF 依赖性。我们通过使用所有各种 PDF 计算每个数据集的 chi(2) 来量化数据和理论之间的一致性。对于强耦合的共同值，PDF 比较是一致执行的。我们还提供了大型强子对撞机喷气机生产的基准比较，比较了各种可用代码和比例设置的结果。最后，我们讨论更新的 NNLO PDF 集对胶子聚变希格斯产生截面中组合 PDF+alpha 不确定性的影响。
We present a detailed comparison of the most recent sets of NNLO PDFs from the ABM, CT, HERAPDF, MSTW and NNPDF collaborations. We compare parton distributions at low and high scales and part on luminosities relevant for LHC phenomenology. We study the PDF dependence of LHC benchmark inclusive cross sections and differential distributions for electroweak boson and jet production in the cases in which the experimental covariance matrix is available. We quantify the agreement between data and theory by computing the chi(2) for each data set with all the various PDFs. PDF comparisons are performed consistently for common values of the strong coupling. We also present a benchmark comparison of jet production at the LHC, comparing the results from various available codes and scale settings. Finally, we discuss the implications of the updated NNLO PDF sets for the combined PDF+alpha(s) uncertainty in the gluon fusion Higgs production cross sections.