Total top-quark pair-production cross section at hadron colliders through O(αS(4)).
Total top-quark pair-production cross section at hadron colliders through O(αS(4)).
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DOI：
10.1103/physrevlett.110.252004
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发表时间：
2013-03
影响因子：
8.6
通讯作者：
M. Czakon;P. Fiedler;A. Mitov
中科院分区：
文献类型：
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作者：
M. Czakon;P. Fiedler;A. Mitov
我们计算了反应gg→TT+X的全截面的次前级量子色动力学修正。与我们先前计算的部分子通道一起，本文的结果完善了强子对撞机顶对产生总截面的次前级量子色动力学修正。我们估计，由于未知的高阶修正，在LHC和Tevatron，由于未知的高阶修正，这个观测值的理论不确定度在LHC约为3%，在Tevatron为2.2%。我们观察到标准模型预测和可用的实验测量之间有很好的一致性。这个可观测到的非常高的理论精度使得对部分子分布函数和新的物理搜索的审查达到了一个新的水平。
We compute the next-to-next-to-leading order (NNLO) quantum chromodynamics (QCD) correction to the total cross section for the reaction gg → tt + X. Together with the partonic channels we computed previously, the result derived in this Letter completes the set of NNLO QCD corrections to the total top pair-production cross section at hadron colliders. Supplementing the fixed order results with soft-gluon resummation with next-to-next-to-leading logarithmic accuracy, we estimate that the theoretical uncertainty of this observable due to unknown higher order corrections is about 3% at the LHC and 2.2% at the Tevatron. We observe a good agreement between the standard model predictions and the available experimental measurements. The very high theoretical precision of this observable allows a new level of scrutiny in parton distribution functions and new physics searches.