We make an updated review and a systematic and comprehensive analysis of the decays of Higgs bosons in the Standard Model (SM) and its three well-defined prototype extensions such as the complex singlet extension of the SM (cxSM), the four types of two Higgs-doublet models (2HDMs) without tree-level Higgs-mediated flavor-changing neutral current (FCNC) and the minimal supersymmetric extension of the SM (MSSM). We summarize the theoretical predictions for the decay widths of the SM Higgs boson and those of Higgs bosons appearing in its extensions taking account of all possible decay modes. We incorporate them to study and analyze decay patterns of CP-even, CP-odd, and CP-mixed neutral Higgs bosons and charged ones. We put special focus on the properties of a neutral Higgs boson with mass about 125 GeV discovered at the LHC and present constraints obtained from precision analysis of it. This review is intended to be self-contained and consolidated by coherently integrating relevant physics information for studying decays of Higgs bosons in the SM and beyond.

我们对标准模型 (SM) 中希格斯玻色子的衰变及其三个明确定义的原型扩展，例如 SM 的复杂单线态扩展 (cxSM)、四种类型的两种Higgs-doublet 模型 (2HDMs) 没有树级 Higgs 介导的风味改变中性电流 (FCNC) 和 SM 的最小超对称扩展 (MSSM)。我们总结了对 SM 希格斯玻色子的衰变宽度和出现在其扩展中的希格斯玻色子衰变宽度的理论预测，同时考虑了所有可能的衰变模式。我们将它们结合起来研究和分析 CP 偶数、CP 奇数和 CP 混合中性希格斯玻色子和带电玻色子的衰变模式。我们特别关注在 LHC 中发现的质量约为 125 GeV 的中性希格斯玻色子的特性，并提出了从其精确分析中获得的约束。这篇综述旨在通过连贯整合相关物理信息来研究 SM 及以后的希格斯玻色子衰变，从而实现独立和巩固。