Higgs boson decays to $\gamma\gamma$ and $Z \gamma$ in models with Higgs extensions

TL;DR

This paper investigates how extended Higgs sectors influence the decay rates of Higgs bosons to gamma gamma and Z gamma, proposing combined measurements to distinguish between the Standard Model and larger Higgs frameworks.

Contribution

It analyzes the impact of extended Higgs models on specific Higgs decay channels and suggests a method to identify non-standard Higgs properties through combined decay rate measurements.

Findings

Extended Higgs sectors alter decay rates of Higgs to gamma gamma and Z gamma.

Simultaneous measurement of these decay modes can reveal deviations from the Standard Model.

Proposed approach helps distinguish between Standard Model Higgs and larger Higgs sectors.

Abstract

The decays of a Higgs boson to the $\gamma\gamma$ and $Z\gamma$ final states are purely quantum mechanical phenomena that are closely related to each other. We study the effects of an extended Higgs sector on the decay rates of the two modes. We propose that a simultaneous determination of them and the $ZZ$ mode is a useful way to see whether the Higgs boson recently observed by the LHC experiments is of the standard model type or could be a member of a larger Higgs sector.