NNLO QCD corrections to Higgs boson production at large transverse momentum
NNLO QCD corrections to Higgs boson production at large transverse momentum
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DOI：
10.1007/jhep10(2016)066
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发表时间：
2016-07
影响因子：
5.4
通讯作者：
Xuan Chen;J. Cruz-Martinez;T. Gehrmann;E. Glover;M. Jaquier
中科院分区：
文献类型：
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作者：
Xuan Chen;J. Cruz-Martinez;T. Gehrmann;E. Glover;M. Jaquier
在有效场论中，我们导出了Higgs玻色子对有限横动量部分子反冲产生的二阶QCD修正，其中顶夸克的贡献被积分出来。为了考虑夸克质量效应，我们用首阶夸克质量依赖性来补充有效场论的结果。我们的计算是完全差分的最终状态的运动学，包括希格斯玻色子的衰变到光子对。它允许人们对希格斯加喷流的最终状态和希格斯玻色子的横向动量分布进行次-次-领先阶（NNLO）精确的理论预测，并考虑到基准截面的实验定义。NNLO QCD修正是适度的和正的，它们使理论预言的不确定性大大降低。我们比较我们的结果8 TeV的LHC数据从ATLAS和CMS。虽然两个实验的数据形状都得到了很好的描述，但我们只同意CMS的归一化。通过将数据和理论归一化到希格斯粒子产生的包容性基准截面，发现两个实验都有很好的一致性，但代价是增加了理论的不确定性。我们在13 TeV的LHC，这是在最近的ATLAS数据很好的协议希格斯生产观测的预测。在此能量下，有效场论预测的高阶质量修正在大横动量下变得很重要，我们讨论了由此产生的预测的不确定性。
We derive the second-order QCD corrections to the production of a Higgs boson recoiling against a parton with finite transverse momentum, working in the effective field theory in which the top quark contributions are integrated out. To account for quark mass effects, we supplement the effective field theory result by the full quark mass dependence at leading order. Our calculation is fully differential in the final state kinematics and includes the decay of the Higgs boson to a photon pair. It allows one to make next-to-next-to-leading order (NNLO)-accurate theory predictions for Higgs-plus-jet final states and for the transverse momentum distribution of the Higgs boson, accounting for the experimental definition of the fiducial cross sections. The NNLO QCD corrections are found to be moderate and positive, they lead to a substantial reduction of the theory uncertainty on the predictions. We compare our results to 8 TeV LHC data from ATLAS and CMS. While the shape of the data is well-described for both experiments, we agree on the normalization only for CMS. By normalizing data and theory to the inclusive fiducial cross section for Higgs production, good agreement is found for both experiments, however at the expense of an increased theory uncertainty. We make predictions for Higgs production observables at the 13 TeV LHC, which are in good agreement with recent ATLAS data. At this energy, the leading order mass corrections to the effective field theory prediction become significant at large transverse momenta, and we discuss the resulting uncertainties on the predictions.