Track impact parameter resolution in the 2017 dataset with the CMS Phase-1 Pixel detector

This note summarizes preliminary results on the measurement of the transverse impact parameter resolution of tracks using legacy data collected in proton-proton collisions in 2017 with the Phase-1 Pixel detector. The measurement is performed in unbiased collision events with respect to the beam-spot position. The resultant track impact parameter resolution is parameterized as a function of track $p_{\rm T}$ and $\eta$.