Related paper Measurement of charm production at central rapidity in proton-proton collisions at $\sqrt{s} = 2.76$ TeV Acceptance $\times$ efficiency $\times 2 y_{\rm fid}$ for $\Dzero$ (left), $\Dplus$ (centre) and $\Dstar$ (left) as a function of $\pt$, where $2 y_{\rm fid}$ is the fiducial acceptance (see text).[png] [pdf]