Top anomalous magnetic moment and the two photon decay of Higgs

Abstract

We compute the dependence of the Higgs to two-photon decay rate $Γ_{h\to γγ}$ 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 $Γ_{h\to γγ}$.

4 pages, 2 figures; v2, plot of decay rate expanded range; v3, updated with recent experimental results, removed plot of beta-function