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arXiv 2005.12128hep-phhep-ex
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LHC上WW和WWj产生的固定顺序和合并部分子簇射预测,包括NLO、QCD和EW修正

Fixed-order and merged parton-shower predictions for WW and WWj production at the LHC including NLO QCD and EW corrections

Stephan Bräuer, Ansgar Denner, Mathieu Pellen, Marek Schönherr, Steffen Schumann

摘要:

首先,我们提出了一个联合分析${\rm p}{\rm p} \to μ^+ ν_μ{\rm e}^- \bar ν_{\rm e}$和${\rm p}{\rm p} \to μ^+ ν_μ{\rm e}^- \bar ν_{\rm e} {\rm j}$在次领先的顺序,包括QCD和电弱修正。其次,我们提供了所有的顺序预测${\rm p}{\rm p} \to μ^+ ν_μ{\rm e}^- \bar ν_{\rm p}+\mathrm{jets}$使用合并的部分子簇射模拟,也包括近似的EW效应。一个完全包容的样本WW生产相比,固定顺序计算独家零和一个喷气机的选择。在截面和实际实验装置的微分分布水平上详细研究了各种高阶效应。我们的研究证实,合并的预测比固定顺序的预测更稳定,特别是关于两个过程之间的比率。

英文摘要:

First, we present a combined analysis of ${\rm p}{\rm p} \to μ^+ ν_μ{\rm e}^- \bar ν_{\rm e}$ and ${\rm p}{\rm p} \to μ^+ ν_μ{\rm e}^- \bar ν_{\rm e} {\rm j}$ at next-to-leading order, including both QCD and electroweak corrections. Second, we provide all-order predictions for ${\rm p}{\rm p} \to μ^+ ν_μ{\rm e}^- \bar ν_{\rm p}+\mathrm{jets}$ using merged parton-shower simulations that also include approximate EW effects. A fully inclusive sample for WW production is compared to the fixed-order computations for exclusive zero- and one-jet selections. The various higher-order effects are studied in detail at the level of cross sections and differential distributions for realistic experimental set-ups. Our study confirms that merged predictions are significantly more stable than the fixed-order ones in particular regarding ratios between the two processes.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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