Product of acceptance and efficiency for $\Dzero$ mesons as a function of $\pt$ (left) and as a function of $y_{\rm lab}$ (right). In the left panel, efficiencies are shown for prompt $\Dzero$ with (solid line) and without (dashed line) PID selection applied, and feed-down $\Dzero$ (dotted line). In the right panel, the ${\rm Acc}\times\epsilon$ values are shown for prompt $\Dzero$ mesons for the three $\pt$ intervals considered in the analysis as a function of rapidity.