Köln 2004 – wissenschaftliches Programm

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HK: Physik der Hadronen und Kerne

HK 14: Poster Session: Heavy Ions

HK 14.9: Poster

Dienstag, 9. März 2004, 13:30–15:30, Foyer

Electron identification with CERES — •Oliver Busch — Gesellschaft für Schwerionenforschung, Darmstadt, Germany

The CERES experiment measures low-mass dilepton production in heavy-ion collisions at the CERN SPS. The traditional electron reconstruction strategy combines electron identification and standalone tracking in 2 Ring Imaging Çerenkov (RICH) detectors. After the CERES upgrade, the CERES radial TPC provides powerful tracking and momentum reconstruction capabilities. This motivates new analysis strategies to separate tracking, particle identification, and rejection of electron pairs from physically trivial sources. We present track dependent methods for RICH ring reconstruction applied to data from Pb-Au collisions at 158 AGeV.