Performance of the Tracking System at the LHCb Experiment

The LHCb experiment is specialized in a very precise reconstruction of B decays into many particle final states. The LHCb detector is a forward spectrometer with a tracking system based on silicon strip detectors and straw-tube drift chambers before and after a dipole generating a magnetic field, to precisely measure the vertex position and the momentum resolution of the particles traveling through the detector. We report on the performances of the individual tracking subdetectors in terms of hit resolution and detector efficiencies, as well as on the overall track reconstruction performance and the alignment status.