论文标题
希格斯（Higgs
Higgs decay to fermion pairs at NLO in SMEFT
论文作者
论文摘要
在标准模型有效野外理论（SMEFT）中固定操作员维度处的近代领导顺序（NLO）扰动校正的计算一直是引起极大兴趣的话题。在本文中，我们获得了从尺寸6运算符到希格斯玻色子衰减的NLO校正$ h \ to f \ bar {f} $，其中fermions $ f \ in \ in \ {μ，τ，c \} $。这将$ h \的先前结果扩展到b \ bar {b} $到所有与现象学相关的希格斯玻色子衰减中的结果，并为在有效的现场理论中对这些衰减的将来的精度分析提供了基础。我们指出，研究衰减速率比SMEFT的不同费用的好处，其中最令人惊讶的是对异常的$Hγγ$和$ HGG $耦合的敏感性增强，尤其是在风味依赖性的Wilson系数受到微型味道限制的情况下，尤其是在风味依赖性的Wilson系数的情况下。
The calculation of next-to-leading order (NLO) perturbative corrections at fixed operator dimension in Standard Model Effective Field Theory (SMEFT) has been a topic of much recent interest. In this paper we obtain the NLO corrections from dimension-6 operators to the Higgs boson decays $h\to f\bar{f}$, where the fermions $f \in \{μ,τ,c\}$. This extends previous results for $h\to b\bar{b}$ to all phenomenologically relevant Higgs boson decays into fermions, and provides the basis for future precision analyses of these decays within effective field theory. We point out the benefits of studying ratios of decay rates into different fermions in SMEFT, the most surprising of which is enhanced sensitivity to anomalous $hγγ$ and $hgg$ couplings induced by flavor-universal SMEFT operators, especially in scenarios where flavor-dependent Wilson coefficients are constrained by Minimal Flavor Violation.
