Münster 2011 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 15: Schwerionenkollisionen und QCD Phasen III

HK 15.4: Vortrag

Dienstag, 22. März 2011, 15:00–15:15, HS AP

Performance Studies for the Measurement of ψ′ via the Decay Channel ψ‵ → J/ψ   π⁺π⁻ → e⁺e⁻ π⁺π⁻ with the ALICE Detector — •Moritz Pohl¹, Christoph Blume², and Frederick Kramer¹ — ¹University of Frankfurt — ²University of Heidelberg

The measurement of quarkiona production in heavy-ion collisions is crucial for the investigation of the Quark-Gluon Plasma, as studied by the ALICE experiment at the LHC. An important baseline for such studies are corresponding measurements in pp collisions.

The decay channel ψ‵ → J/ψ   π⁺π⁻ → e⁺e⁻ π⁺π⁻ is of particular interest because it allows to estimate the contribution of secondary J/ψ to the total measured yield which results from the decay of exicted charmonium states. Results of a Monte Carlo based study at √s = 7 TeV pp collisions will be presented. Acceptance and reconstruction efficiencies using the central barrel detectors of ALICE - the Inner Trackings System (ITS), the Time Projection Chamber (TPC) and the Transition Radiation Detector (TRD) - be discussed. Investigations on the signal to background ratio and possible strategies for improvements will be presented.