Abstract
The LHCb particle identification (PID) is crucial for LHCb flavour physics. The LHCb PID system consists of two ring-imaging Cherenkov detectors, a calorimeter system, and muon chambers. Information of those sub-detectors is combined in powerful PID observables using multivariate classifiers to achieve an optimum of separation quality. The detector's PID efficiencies are calculated with dedicated calibration data samples which are recorded with a new computing strategy in Run 2 of the LHC. The general PID strategy in Run 2 is presented as well as the PID performance for charged and neutral particle species as a key part of the LHCb physics programme.
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