Performance of the upgraded CMS pixel detector for the LHC Phase 1

After the Phase 1 upgrade the Large Hadron Collider is expected to reach an instantaneous luminosity of $2\times 10^{34}\mbox{cm}^{-2}\mbox{s}^{-1}$ or higher, resulting in an extreme operating environment for the experiments, particularly their tracking devices. In order to maintain its current performance level, the CMS pixel detector will be replaced by a more lightweight system with additional instrumentation, better acceptance and refined front-end electronics. The upgraded pixel detector will provide improved track and vertex reconstruction, standalone tracking capabilities, as well as identification of long-lived particles, which will be key elements of many physics analyses with CMS.