Münster 2011 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 8: Schwerionenkollisionen und QCD Phasen II
HK 8.7: Talk
Monday, March 21, 2011, 18:30–18:45, HS AP
Low-mass di-electron reconstruction in the CBM experiment at FAIR — •Elena Lebedeva1, Tatyana Galatyuk1, Claudia Höhne2, and Joachim Stroth1 — 1Goethe-Universität, Frankfurt, Germany — 2Justus-Liebig Universität, Giessen, Germany
The Compressed Baryonic Matter (CBM) experiment at the future FAIR facility will measure lepton pairs emitted out of the hot and dense stage of relativistic heavy-ion collisions from 8-45 GeV/u beam energies. One of the experimental goals of the CBM experiment is the reconstruction of low-mass vector mesons (ρ0, ω and φ) by means of their electromagnetic decay.
The challenge is to effectively reduce the combinatorial background with the currently foreseen experimental setup, which does not provide electron identification in front of the magnetic field. The strategy of electron identification and background suppression will be discussed in particular with respect to systematic studies of the detector performance. Signal reconstruction efficiencies and signal-to-background ratios as function of collision energy will be presented.