论文标题
$ h \ rightarrow b \ bar {b} $和$ h \ rightarrow c \ bar {c} $ at $ \ mathcal {o}（α_s^3）$的顶级贡献
Top-induced contributions to $H\rightarrow b\bar{b}$ and $H\rightarrow c\bar{c}$ at $\mathcal{O}(α_s^3)$
论文作者
论文摘要
在本文中，我们介绍了对部分宽度的贡献$ h \ rightarrow b \ bar {b} $和$ h \ rightarrow c \ bar {c} $对顶级Quark Yukawa将$ y_t $ y_t $ coupl $ y_t $ coupto $ y_t $ coulto $α_s^3 $敏感的完全分别计算。这些贡献首先以$α_s^2 $的顺序输入，通过与$ y_t y_q $成比例的条款（$ q = b，c $）输入。以$α_s^3 $校正为订单，以及与$ y_t^2 $成比例的新贡献。我们的结果保留了整个最终国家夸克的质量，而顶级夸克则被整合在一起，从而产生了有效的田间理论（EFT）。我们的结果被实施到蒙特卡洛代码中，允许应用任意的最终选择削减。例如，我们使用Durham Jet聚集算法提出了Higgs Boson Rest框架中可观察物的差分分布。我们发现，顶部引起的（即EFT）零件的总影响对最终裁切的性质，尤其是B-Tagging和C Tagging要求的性质敏感。对于底部的夸克，EFT零件在百分比左右的总宽度（和差分分布）中有助于。对于$ h \ rightarrow c \ bar {c} $通道的影响要大得多，效果高达15％。但是，我们表明，通过应用射流选择切割可以大大降低它们的影响。
In this paper we present a fully-differential calculation for the contributions to the partial widths $H\rightarrow b\bar{b}$ and $H\rightarrow c\bar{c}$ that are sensitive to the top quark Yukawa coupling $y_t$ to order $α_s^3$. These contributions first enter at order $α_s^2$ through terms proportional to $y_t y_q$ ($q=b,c$). At order $α_s^3$ corrections to the mixed terms are present as well as a new contribution proportional to $y_t^2$. Our results retain the mass of the final-state quarks throughout, while the top quark is integrated out resulting in an effective field theory (EFT). Our results are implemented into a Monte Carlo code allowing for the application of arbitrary final-state selection cuts. As an example we present differential distributions for observables in the Higgs boson rest frame using the Durham jet clustering algorithm. We find that the total impact of the top-induced (i.e. EFT) pieces is sensitive to the nature of the final-state cuts, particularly b-tagging and c-tagging requirements. For bottom quarks, the EFT pieces contribute to the total width (and differential distributions) at around the percent level. The impact is much bigger for the $H\rightarrow c\bar{c}$ channel, with effects as large as 15%. We show however that their impact can be significantly reduced by the application of jet-tagging selection cuts.
