Revisiting $HW\rightarrow\gamma\gamma\ell\nu$

Abstract

A new particle of mass around 125 GeV is known to have loop induced couplings to $gg$ and $\gamma\gamma$. More specific to the Higgs interpretation are tree level couplings to $W$ and $Z$. A small but clean signal of the Higgs coupling to $W$ arises from associated production of a Higgs, with $H\rightarrow\gamma\gamma$. We consider this signal in light of a large NLO enhancement of the irreducible background.