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arXiv 2010.09451hep-ph
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NLO对光夸克混合QCD-EW对Higgs产生的贡献的修正

NLO Corrections to Light-Quark Mixed QCD-EW Contributions to Higgs Production

Matteo Becchetti, Roberto Bonciani, Vittorio Del Duca, Valentin Hirschi, Francesco Moriello, Armin Schweitzer

摘要:

我们首次提出了精确的非线性光学QCD修正的光夸克部分的混合QCD-EW的贡献,希格斯粒子通过胶子融合在LHC 13,与确切的EW玻色子质量依赖。相关的两个回路的实际发射矩阵元素计算使用动态的一维系列扩展策略,其稳定性和速度允许使用本地IR减法计数器的数值相空间积分。对于$μ_R=μ_F=M_H$,我们发现:\begin{equation}σ^{(α_s^2α^2+α_s^3α^2)}_{g g\rightarrow H+X} = 1.467(2)^{\;+18.7\%}_{\;-14.6\%}\;(μ_R\;\text{var.})\;\pm 2\%\;(\text{PDF}) \ \textrm{pb},\end{equation},我们使用它来提供最佳结果,包括抑制贡献的估计:\begin{equation}σ^{(\text{EW},\textrm{best})}_{p p\rightarrow H+X} = 2.11 \pm 0.28 \ (\textrm{theory}) \ \mathrm{pb}.\end{equation}

英文摘要:

We present for the first time the exact NLO QCD corrections to the light-quark part of the mixed QCD-EW contributions to Higgs production via gluon fusion at LHC13, with exact EW-boson mass dependence. The relevant two-loop real-emission matrix element is computed using a dynamic one-dimensional series expansion strategy whose stability and speed allows for a numerical phase-space integration using local IR subtraction counterterms. For $μ_R=μ_F=M_H$, we find: \begin{equation}σ^{(α_s^2α^2+α_s^3α^2)}_{g g\rightarrow H+X} = 1.467(2)^{\;+18.7\%}_{\;-14.6\%}\;(μ_R\;\text{var.})\;\pm 2\%\;(\text{PDF}) \ \textrm{pb},\end{equation} which we use to provide the best result including an estimate of suppressed contributions: \begin{equation}σ^{(\text{EW},\textrm{best})}_{p p\rightarrow H+X} = 2.11 \pm 0.28 \ (\textrm{theory}) \ \mathrm{pb}.\end{equation}

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