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Higgs pair production at the LHC with NLO and parton-shower effects

机译:LHC上的希格斯配对制作具有NLO和部分花洒效果

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摘要

We present predictions for the SM-Higgs-pair production channels of relevance at the LHC: gluon-gluon fusion, VBF, and top-pair, W, Z and single-top associated production. All these results are at the NLO accuracy in QCD, and matched to parton showers by means of the MC@NLO method; hence, they are fully differential. With the exception of the gluon-gluon fusion process, for which a special treatment is needed in order to improve upon the infinite-top-mass limit, our predictions are obtained in a fully automatic way within the publicly available MADGRAPH5_AMC@NLO framework. We show that for all channels in general, and for gluon-gluon fusion and top-pair associated production in particular, NLO corrections reduce the theoretical uncertainties, and are needed in order to arrive at reliable predictions for total rates as well as for distributions.
机译:我们提出了在大型强子对撞机相关的SM-希格斯对生产渠道的预测:胶子-胶子融合,VBF和顶对,W,Z和单顶相关生产。所有这些结果均达到QCD中的NLO精度,并通过MC @ NLO方法与parton花洒匹配。因此,它们是完全差分的。除了胶子-胶子融合工艺(需要对其进行特殊处理以改善无限大质量极限)以外,我们的预测是在公开提供的MADGRAPH5_AMC @ NLO框架内以全自动方式获得的。我们表明,对于一般的所有渠道,特别是对于胶子-胶子融合和与顶对相关的生产,NLO校正减少了理论上的不确定性,因此需要对总速率和分布进行可靠的预测。

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