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arXiv 1808.01660hep-phhep-ex
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汤川对LHC生产bbH的贡献

Top-Yukawa contributions to bbH production at the LHC

Nicolas Deutschmann, Fabio Maltoni, Marius Wiesemann, Marco Zaro

摘要:

我们研究了大型强子对撞机强子碰撞中希格斯玻色子与底夸克($b\bar{b}H$)的产生,包括与顶夸克汤川耦合($y_t^2$)、底夸克($y_b^2$)成比例的项所产生的不同贡献。他们的干扰($y_b y_t$)。我们的结果在QCD中精确到次领先阶,采用四味方案和(Born改进的)重顶夸克近似。我们发现,下一个领先的订单修正$y_t^2$组件是相当大的,使其成为主导的生产机制相关的$b\bar{b}H$生产的标准模型,并增加其包容率几乎是一个因素的两倍。通过研究各种贡献的末态分布,我们确定了可观测量和选择切割,可用于选择各种组件,并提高底夸克汤川耦合的$b\bar{b}H$生产的实验灵敏度。

英文摘要:

We study the production of a Higgs boson in association with bottom quarks ($b\bar{b}H$) in hadronic collisions at the LHC, including the different contributions stemming from terms proportional to the top-quark Yukawa coupling ($y_t^2$), to the bottom-quark one ($y_b^2$), and to their interference ($y_b y_t$). Our results are accurate to next-to-leading order in QCD, employ the four-flavour scheme and the (Born-improved) heavy-top quark approximation. We find that next-to-leading order corrections to the $y_t^2$ component are sizable, making it the dominant production mechanism for associated $b\bar{b}H$ production in the Standard Model and increasing its inclusive rate by almost a factor of two. By studying final-state distributions of the various contributions, we identify observables and selection cuts that can be used to select the various components and to improve the experimental sensitivity of $b\bar{b}H$ production on the bottom-quark Yukawa coupling.

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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