Fig. 15.

Ratios of data to MC simulation for observables relevant to the primary vertex reconstruction performance: a track transverse momentum $p_{\text{T}}$, b number of tracks per vertex, c $\sqrt{\mathrm{\Sigma }{p}_{\text{T}}^2}$ of the tracks in each vertex. Error bars represent only statistical uncertainties. The ratios are shown for low (0–1) and high (55–72) values of $\mathit{\mu }$. The bottom panel in each figure shows the double ratio of high to low $\mathit{\mu }$