Fig. 5.

Observed and expected 95% CL upper limits on the product $\mathit{\sigma }(\mathrm{X})\mathcal{B}(\mathrm{X}\to \mathrm{W}\mathrm{H})\mathcal{B}(\mathrm{H}\to \mathrm{b}\overline{\mathrm{b}})$ (upper) and $\mathit{\sigma }(\mathrm{X})\mathcal{B}(\mathrm{X}\to \mathrm{Z}\mathrm{H})\mathcal{B}(\mathrm{H}\to \mathrm{b}\overline{\mathrm{b}})$ (lower) as a function of the resonance mass for a single narrow spin-1 resonance, for the combination of the eight categories, and including all statistical and systematic uncertainties. The inner green and outer yellow bands represent the $\pm 1$ and $\pm 2$ standard deviation uncertainties in the expected limit. The purple and red solid curves correspond to the cross sections predicted by the HVT model A and model B, respectively