Figure 4

Average of $\Dzero$, $\Dplus$ and $\Dstar$ relative yields as a function of the relative charged-particle multiplicity at central rapidity (a) Average of D-meson relative yields in $\pt$ intervals (b) Ratio of the average relative yields in all $\pt$ intervals with respect to that of the $2< \pt< 4 \mathrm{GeV}/c$ interval The results are presented in the top panels with their statistical (vertical bars) and systematic (boxes) uncertainties, except for the feed-down fraction uncertainty that is drawn separately in the bottom panels The position of the points on the abscissa is the average value of $({\rm d}N_{\rm ch}/{\rm d}\eta) \big/ \langle {\rm d}N_{\rm ch}/{\rm d}\eta \rangle$ For some $\pt$ intervals the points are shifted horizontally by 1.5% to improve the visibility The dashed lines are also shown to guide the eye, a diagonal on (a) and a constant on (b)