Darmstadt 2016 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 44: Instrumentation XII
HK 44.5: Vortrag
Mittwoch, 16. März 2016, 17:45–18:00, S1/01 A2
Electron identification performance of the now completely installed ALICE TRD and its potential for J/ψ measurements in Run 2 — •Pascal Dillenseger, Christoph Blume, and Julian Book for the ALICE collaboration — Institut für Kernphysik, Goethe-Universität Frankfurt
The study of J/ψ production in ultrarelativistic heavy-ion collisions provides information about deconfinement in matter under extreme conditions. The ALICE experiment at the LHC is able to measure the e+e− J/ψ decay channel at mid-rapidity (|y| < 0.9) and down to pT = 0. One of the main challenges in this channel is the hadronic background in the sample of electron candidates. The excellent PID performance of ALICE during Run 1, mainly by the measurement of dE/dx in the large TPC, will be further improved by the Transition Radiation Detector (TRD) in Run 2, which has recently started. This has become possible after the completion of the TRD during the Long Shutdown 1. In this presentation, the PID methods and the performance of the full TRD and its impact on the J/ψ measurement in Run 2 will be discussed.