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arXiv 2310.09354hep-ph
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强子Higgs衰变中的四喷注事件形状

Four-jet event shapes in hadronic Higgs decays

Aude Gehrmann-De Ridder, Christian T Preuss, Ciaran Williams

AI总结:

本文研究了强子Higgs衰变中类四喷注事件形状的次领头阶微扰QCD预测,考虑了$b\ar{b}$和$gg$两类衰变模式,发现NLO修正较大且两种模式存在明显形状差异。

摘要:

我们给出了强子Higgs衰变中类四喷注事件形状观测量的次领头阶微扰QCD预测。为此,我们考虑了两类Higgs衰变:包括Yukawa诱导的衰变到$b\ar{b}$对,或通过有效Higgs-gluon-gluon耦合圈诱导的衰变到两个胶子。我们给出了与事件形状变量thrust minor、light-hemisphere mass、narrow jet broadening、$D$-parameter和Durham四到三喷注跃迁变量相关的分布结果。对于每个观测量,我们研究了高阶修正的影响,并比较了两类Higgs衰变中修正的大小和形状。我们发现了大的NLO修正,两种衰变模式之间存在明显的形状差异,导致与$H\ o gg$衰变模式相关的分布峰值发生显著偏移。

英文摘要:

We present next-to-leading order perturbative QCD predictions for four-jet-like event-shape observables in hadronic Higgs decays. To this end, we take into account two Higgs-decay categories: involving either the Yukawa-induced decay to a $b\bar{b}$ pair or the loop-induced decay to two gluons via an effective Higgs-gluon-gluon coupling. We present results for distributions related to the event-shape variables thrust minor, light-hemisphere mass, narrow jet broadening, $D$-parameter, and Durham four-to-three-jet transition variable. For each of these observables we study the impact of higher-order corrections and compare their size and shape in the two Higgs-decay categories. We find large NLO corrections with a visible shape difference between the two decay modes, leading to a significant shift of the peak in distributions related to the $H\to gg$ decay mode.

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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