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HK: Fachverband Physik der Hadronen und Kerne
HK 26: Instrumentation und Anwendungen II
HK 26.8: Talk
Tuesday, March 11, 2008, 13:00–13:15, 2D
Electron/Pion Separation in the ALICE TRD — Alexander Wilk1 and •Alexandru Bercuci2 — 1Institut für Kernphysik, Münster — 2Gesellschaft für Schwerionenforschung, Darmstadt
The identification of electrons with momenta > 1 GeV/c is one of the most important features of the ALICE Transition Radiation Detector (TRD). In 2007 a complete TRD supermodule was used for the first time for measurements in a beam of pions and electrons at the CERN PS.
A major goal of these measurements was to obtain runs with very high statistics (some 100k events) and a good independent electron/pion discrimination. These runs are used to extract reference data to be used for the electron/hadron identification procedures for physics data in ALICE, such as the 2-d likelihood method or an approach using artificial neural networks. In this talk we present the results of the pion suppression for momenta from 1 to 6 GeV/c as well as a comparison to results from simulations.
This work is supported by BMBF.