Higgs boson couplings as a probe of new physics

TL;DR

Precise measurements of Higgs boson couplings can reveal deviations from the Standard Model, indicating new physics such as additional Higgs bosons, and help distinguish between different non-minimal Higgs sectors.

Contribution

The paper analyzes patterns of deviations in Higgs couplings in simple non-minimal Higgs sectors to identify signatures of new physics.

Findings

Patterns of deviations in $hVV$ and $hfar{f}$ couplings are characterized.

Deviations can serve as indirect evidence for additional Higgs bosons.

Different non-minimal sectors produce distinguishable coupling deviation patterns.

Abstract

Precise measurements of various coupling constants of the 125 GeV Higgs boson $h$ are one of the most important and solid methods to determine the structure of the Higgs sector. If we find deviations in the $h$ coupling constants from the standard model predictions, it can be an indirect evidence of the existence of additional Higgs bosons in non-minimal Higgs sectors. Furthermore, we can distinguish non-minimal Higgs sectors by measuring a pattern of deviations in various $h$ couplings. In this talk, we show patterns of the deviations in several simple non-minimal Higgs sectors, especially for the gauge $hVV$ and Yukawa $hf\bar{f}$ couplings. This talk is based on the paper [1].