Comparison of $H\to\ell\bar{\ell}γ$ and $H\toγ\,Z, Z\to\ell\bar{\ell}$ including the ATLAS cuts
arXiv:1310.4380 · doi:10.1103/PhysRevD.89.033013
Abstract
A precise comparison is made between the Dalitz decay $H\to\ell\bar{\ell}γ$ and the two body decay $H\toγZ,Z\to\ell\bar{\ell}$ for electrons and for muons including experimental cuts appropriate for the ATLAS detector. The widths for these two processes differ by 8% for electrons and 3% for muons. Given that there remain QCD radiative corrections of this order that are not included, this suggests that the isolation of the Dalitz decay will be challenging.
4 pages, 3 figures, 2 tables