Köln 2004 – scientific programme

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HK: Physik der Hadronen und Kerne

HK 14: Poster Session: Heavy Ions

HK 14.15: Poster

Tuesday, March 9, 2004, 13:30–15:30, Foyer

Calculation of the track length and time of flight in ALICE central barrel detectors — •Sylwester Radomski — Gesellschaft fuer Schwerionenforschung mbH

The ALICE experiment, currently under construction, is designed for the investigation of the heavy ion reactions at LHC collider. The central barrel of the ALICE experiment is composed out of three tracking detectors: ITS, TPC, TRD and TOF detector. Tracks are reconstructed and fit by the algorithm based on the Kalman Filter. The separation between 5pB/K and p/K is performed by combining the information of the track length and time–of–flight hypothesis from the track reconstruction and time–of–flight measurement from TOF detector. In this talk the algorithms of the calculation of the track length and the corresponding time–of–flight hypothesis, for different particle types, are described. The results of the simulation studies are presented and compared with theoretical estimations. The impact of the track length and momentum resolution on the calculated time–of–flight resolution is investigated. The importance of this study for electron identification in ALICE is pointed out.