The operational experience of the Upstream Tracker

Abstract

The LHCb experiment has faced a major upgrade in order to take data during Run 3 of the LHC with an instantaneous luminosity five times larger with respect to the previous runs. The Upstream Tracker (UT) is the new silicon strip tracking subdetector placed upstream of the LHCb magnet. It is fundamental to the particle reconstruction and plays an important role in the new software trigger. The installation of the UT has been completed in March 2023, representing a milestone for the experiment, and its commissioning phase is ongoing. This paper provides an overview of the status of the detector and details the ongoing work aimed at optimizing its functionality for the physics data acquisition.