Fig. 9.

A comparison of the average number of merged pixel clusters expected for truth particles from simulation and pixel clusters identified as merged used in reconstructed tracks is shown as a function of the $\mathit{\rho }$ and three-prong $\mathit{\tau }$ ($\mathit{\tau }\to {\mathit{\pi }}^{+}{\mathit{\pi }}^{-}{\mathit{\pi }}^{\pm }{\mathit{\nu }}_{\mathit{\tau }}$) transverse momentum. Ideal represents the true number of merged clusters, which would be obtained as the number of identified merged clusters in the case of perfect performance. It is required that the stable charged particles are created before the IBL. a $\mathit{\rho }\to {\mathit{\pi }}^{+}{\mathit{\pi }}^{-}$ sample. b ${\mathit{\tau }}^{\pm }\to {\mathit{\pi }}^{+}{\mathit{\pi }}^{-}{\mathit{\pi }}^{\pm }{\mathit{\nu }}_{\mathit{\tau }}$ sample