Decays of Higgs Bosons in the Standard Model and Beyond

TL;DR

This paper provides a comprehensive review and analysis of Higgs boson decays within the Standard Model and various extensions, including detailed decay predictions and constraints from LHC data.

Contribution

It offers the first systematic comparison of decay patterns across multiple Higgs models, integrating theoretical predictions with experimental constraints.

Findings

Decay widths for SM and extended Higgs models are summarized.

Analysis of decay patterns for various Higgs bosons, including the 125 GeV state.

Constraints on Higgs properties from LHC data are incorporated.

Abstract

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.