Top anomalous magnetic moment and the two photon decay of Higgs

TL;DR

This paper investigates how the Higgs to two-photon decay rate varies with the top quark's gyromagnetic factor, providing a general framework to predict changes due to modifications in $g_t$ and SM corrections.

Contribution

It introduces a calculation of the Higgs to two-photon decay rate dependence on the top quark's gyromagnetic factor, including potential modifications beyond the Standard Model.

Findings

Decay rate depends on $g_t$ in the heavy top limit

Predicted changes in decay rate for one-loop SM correction

Framework allows for further modifications of $g_t$

Abstract

We compute the dependence of the Higgs to two-photon decay rate $\Gamma_{h\to \gamma \gamma}$ on the top quark gyromagnetic factor $g_t$ in the heavy top limit and evaluate the expected change for one-loop SM correction to $g_t$. Our results are general and allow consideration of further modifications of $g_t$ and we predict the resultant $\Gamma_{h\to \gamma \gamma}$.