Bochum 2009 – scientific programme

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HK: Fachverband Hadronen und Kerne

HK 68: Heavy Ion Collisions and QCD phases

HK 68.2: Talk

Thursday, March 19, 2009, 17:00–17:15, H-ZO 10

Study of J/ψ production in p+p collisions at √s = 10 TeV with the Transition Radiation Detector of ALICE using full simulations. — •Dirk Krumbhorn — Physikalisches Intitut, Heidelberg, Deutschland

The performance of J/ψ-production in p+p collisions at √s = 10 TeV with the central barrel detectors in ALICE was studied. In particular, the decay channel J/ψ → e⁺+e⁻ (BR: 6%) with the electron and positron identified by the Transition Radiation Detector (TRD) using full Monte Carlo simulations was examined. Influences of different cuts on reconstructed single tracks as well as the software framework for particle identification with the TRD were carefully studied. We report on the overall J/ψ reconstruction efficiency at mid-rapidity, the J/ψ mass resolution and compare to results from earlier studies using fast simulations. An estimate of the combinatoric background from mis-identified particles and expectations for first year of data taking with ALICE is given.