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HK: Fachverband Hadronen und Kerne
HK 23: Heavy Ion Collisions and QCD phases
HK 23.3: Talk
Tuesday, March 17, 2009, 15:00–15:15, H-ZO 10
Omega production in pp collisions at 3.5 GeV: line shape in the lepton decay channel. — •Attilio Tarantola1, Anar Rustamov2, Herbert Stroebele1, and Joachim Stroth1,2 — 1Institut für Kernphysik Goethe-Universität, 60486 Frankfurt, Germany — 2GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
HADES (High Acceptance Di-Electron Spectrometer) operates at SIS18 of GSI, Darmstadt. It is used to study in-medium properties of light vector mesons in ground state and excited nuclear matter. The observables of interest are their spectral functions and in particular possible modifications of width and mass. These can be identified by comparing the results obtained from pp, pA and AA reactions. In this contribution the reconstructed inclusive dilepton spectrum from pp data at 3.5 GeV kinetic beam energy will be presented. Preliminary results of a differential analysis of the omega meson production will be shown as well. The reconstructed omega meson line shape will be the reference for dilepton spectra obtained in pA reaction measured with HADES.