论文标题
在QCD中的NNLO的两吉格斯 - doublet模型中，带电的希格斯玻色子的衰减和顶级夸克
Decay of the charged Higgs boson and the top quark in two-Higgs-doublet model at NNLO in QCD
论文作者
论文摘要
我们介绍了被带电的希格斯玻色子腐烂的部分宽度的数值计算，$ h^ - \ rightArrow \ rightarrow \ bar {t} + b + x $，以及最高夸克腐烂的部分宽度，转化为轻度的higgs boson $ t \ prokgs boson $ t \ proncrow h^ + browarw h^ + + + + + x $ toct in n in n in n read to（射流质量的分解公式。在两种情况下，NNLO校正都显着降低了部分衰减宽度的重新归一化量表依赖性。我们显示了针对不同带电的希格斯玻色子质量和不同重新归一化量表的NNLO校正的相对大小。 NNLO校正约为200GEV（2000GEV）带电的Higgs玻色子质量（2000GEV）的领先顺序宽度的16％（1％），而对于顶级Quark Decay来说，它很小。我们的分析与Yukawa耦合的详细结构无关，并且可以应用于各种新的物理模型，如衰减分支比例在不同类型的两种类型二键型模型中所证明的那样。
We present numerical calculations of the partial width of the charged Higgs boson decay into a top quark, $H^- \rightarrow \bar{t} + b + X$, and the partial width of the top quark decay into a light charged Higgs boson $t \rightarrow H^+ + b + X$ at next-to-next-to-leading order (NNLO) in QCD, based on a factorization formula of the jet mass. The NNLO corrections significantly reduce the renormalization scale dependence of the partial decay width in both cases. We show relative size of the NNLO corrections for different charged Higgs boson masses and for different renormalization scales. The NNLO corrections are about 16% (1%) of the leading order widths for the charged Higgs boson mass of 200GeV (2000GeV), while it is quite small for the top quark decay. Our analyses are independent of the detailed structure of the Yukawa couplings, and can be applied to various new physics models, as demonstrated by the decay branching ratio in different types of the two-Higgs-doublet models.
