arXiv 1401.73402014-01hep-ph

在具有NLO和部分子簇射效应的LHC上的Higgs对产生

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

R. Frederix, S. Frixione, V. Hirschi, F. Maltoni, O. Mattelaer, P. Torrielli, E. Vryonidou, M. Zaro

备注：: 11 pages, 7 figures, version accepted for publication on PLB
发表信息：: Phys.Lett. B732 (2014) 142-149
DOI：: 10.1016/j.physletb.2014.03.026

摘要：

我们提出的SM-Higgs对生产渠道的相关性在大型强子对撞机：胶子-胶子融合，VBF，和顶对，W，Z和单顶相关的生产预测。这些结果都达到了QCD中的NLO精度，并且用MC@NLO方法与部分子簇射相匹配，因此它们是全微分的。除了胶子-胶子融合过程需要特殊处理以改进无限顶质量极限之外，我们的预测是在公开可用的MadGraph5_aMC@NLO框架内以全自动的方式获得的。我们表明，在一般的所有渠道，特别是胶子-胶子融合和顶对相关的生产，非线性光学校正减少了理论的不确定性，并需要为了达到可靠的预测总速率以及分布。

英文摘要：

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.

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