Figure 1

Reconstruction efficiency of \Vzero\ particles in \pPb\ collisions at \fivenn (left panel) and in pp collisions at \seven (right panel) for three selection criteria: inclusive, within $\Rvj<0.4$ and \Vzero{}s in UE (upper panels) and the ratio relative to inclusive selection (lower panels) UE \Vzero{}s are estimated with the OC estimator ($\Rvj>0.6$) in \pPb collisions and with the PC estimator in pp collisions.