O(αs)Monte Carlo approach toW+ Higgs-boson associated production at hadron supercolliders

We calculate the $O\left({\alpha }_s\right)$ corrections to the process $\mathrm{pp}\to W^{\pm }\mathrm{HX}\to l\nu \gamma \gamma X$ using a Monte Carlo approach. Complete spin correlations are included. We examine the size of QCD corrections before and after minimal cuts on the final state, for both the Superconducting Super Collider and the CERN Large Hadron Collider. By comparing the $\mathrm{WH}$ cross section to the single-$W$ cross section, some uncertainties due to parton distributions may also be eliminated. Comparison of the theoretical cross section with an observed event rate may allow one to distinguish between the presence of a standard model or minimal supersymmetric model intermediate mass Higgs boson.