QCD Corrections and Anomalous Couplings in $Z\gamma$ Production at Hadron Colliders

Abstract

The processes $pp/ pbar p \to Z \gamma + X \to \ell^+ \ell^- \gamma + X$ ($\ell=e, \mu$) and $pp/ pbarp \to Z \gamma + X \to \bar\nu\nu\gamma + X$ are calculated to ${\cal O}(\alpha_s)$ for general $ZZ\gamma$ and $Z\gamma\gamma$ couplings. The impact of ${\cal O}(\alpha_s)$ QCD corrections on the observability of $ZZ\gamma$ and $Z\gamma\gamma$ couplings in $Z\gamma$ production at the Tevatron and the Large Hadron Collider (LHC) is discussed.