Parts | Days | Selection | Search | Downloads | Help
HK: Fachverband Physik der Hadronen und Kerne
HK 13: Physik mit schweren Ionen
HK 13.9: Talk
Monday, March 10, 2008, 18:45–19:00, 2E
Systematic Study of the Optimization Potential for Di-Lepton Measurements in the CBM Experiment — •Konstantin Antipin1, Harald Appelshäuser1, and Claudia Höhne2 for the CBM collaboration — 1Institut für Kernphysik, Universität Frankfurt, Frankfurt — 2Gesellschaft für Schwerionenforschung, Darmstadt
Currently the design of the CBM experiment at the future FAIR complex at GSI is being optimized for precision measurements of lepton pairs. They are considered to be a central observable for the understanding and characterization of the high density baryonic matter created in heavy-ion collisions. Since leptons leave the fireball without interaction, their study can provide information on in-medium properties of vector mesons or on a possible restoration of the chiral symmetry.
In this presentation we will focus on the electron decay channel of the vector mesons. The main challenge in this process is to effectively reduce the combinatorial background. Potential contributions to the background as Dalitz-decays or gamma conversion have to be studied in detail and strategies have to be developed to increase the signal-to-background ratio.
A systematic study on the development of an optimized detector setup for a high precision di-electron measurement will be presented. This includes modifications of the proposed setup of the CBM detector, the introduction of new detector components, establishing of necessary purity levels and particle identification strategies.
This work is supported by BMBF, GSI and H-QM.