# Figure 1

 Acceptance-times-efficiency factor for $\Ds$ mesons as a function of $\pt$. The $(\rm Acc \times \epsilon)$ factors for prompt (red) and non-prompt (blue) $\Ds{}$ mesons in Pb--Pb collisions for the 0--10\% centrality interval are shown, together with those for prompt (orange) and non-prompt (green) $\Ds{}$ mesons for the 30--50\% centrality interval.