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arXiv 1901.02253hep-ph
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希格斯粒子中的推力分布在次领先级和更高的级上衰减

Thrust distribution in Higgs decays at the next-to-leading order and beyond

Jun Gao, Yinqiang Gong, Wan-Li Ju, Li Lin Yang

摘要:

我们预测了希格斯玻色子强子衰变中次领先阶和近似次领先阶的推力分布。近似的NNLO修正来自软/共线相空间区域中的因式分解公式。我们发现大的修正,特别是胶子通道。最低阶的尺度变化往往低估了真正的高阶贡献。因此,本文的结果是必要的,以控制理论预测的摄动不确定性。我们还讨论了可能的改进我们的结果,如软胶子remation的2喷注限制,和一个精确的次到次到领先的顺序计算的多喷注区域。

英文摘要:

We present predictions for the thrust distribution in hadronic decays of the Higgs boson at the next-to-leading order and the approximate next-to-next-to-leading order. The approximate NNLO corrections are derived from a factorization formula in the soft/collinear phase-space regions. We find large corrections, especially for the gluon channel. The scale variations at the lowest orders tend to underestimate the genuine higher order contributions. The results of this paper is therefore necessary to control the perturbative uncertainties of the theoretical predictions. We also discuss on possible improvements to our results, such as a soft-gluon resummation for the 2-jets limit, and an exact next-to-next-to-leading order calculation for the multi-jets region.

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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