Tracking and vertexing in LHCb

LHCb tracking system consists of the Vertex Locator (VELO), a high granularity silicon-strip vertex detector, the Tracker Turicensis (TT), a silicon strip detector upstream of the magnet, and three Tracking Stations (TStations), consisting of the Inner Tracker (IT) in the inner area and the Outer Tracker (OT) in the outer area. The IT is a silicon strip detector, while the OT is made of straw drift tubes. In the most upstream region, five rectangular muon stations, based on the multi wire proportional chamber technology, are placed. This design is very heterogeneous and requires a complex system of charged particle reconstruction algorithms. LHCb has set up a real-time fully automated alignment systems to ensure offline data precision already at the online data level.