General one-loop formulas for decay $h\rightarrow Z\gamma$

TL;DR

This paper derives general one-loop formulas for the decay process h→Zγ, applicable to the Standard Model and its extensions, providing a unified analytic framework for radiative corrections in these decays.

Contribution

It presents new, general one-loop formulas for h→Zγ decay in the unitary gauge, applicable to the Standard Model and various gauge extensions.

Findings

Formulas expressed in Passarino-Veltman functions

Applicable to Standard Model and gauge extensions

Can derive decay width for H±→W±γ

Abstract

Radiative corrections to the $h\rightarrow Z\gamma$ are evaluated in the one-loop approximation. The unitary gauge gauge is used. The analytic result is expressed in terms of the Passarino-Veltman functions. The calculations are applicable for the Standard Model as well for a wide class of its gauge extensions. In particular, the decay width of a charged Higgs boson $H^\pm \rightarrow W^\pm\gamma$ can be derived. The consistence of our formulas and several specific earlier results is shown.