Performance of the particle identification system at LHCb

Effective particle identification (PID) is crucial for LHCb to meet its ambitious physics objectives after "Upgrade I". To handle the higher luminosity and pile-up conditions of Run 3, LHCb has significantly upgraded its core PID subsystems, which include the Ring Imaging Cherenkov detectors, electromagnetic and hadronic calorimeters, and muon stations. This document provides an updated assessment of the PID performance following these upgrades, with a focus on charged hadrons and leptons. The results demonstrate that the enhanced subsystems offer reliable and robust PID capabilities under the challenging operational conditions of Run 3, ensuring LHCb’s ability to continue producing world-class physics results in the near future.