The Compressed Baryonic Matter (CBM) experiment is designed to investigate high baryon density matter at moderate temperatures in Au+Au collisions at 4-35A GeV beam energies. Among the different observables, lepton pairs are particularly attractive, as they directly probe the entire space-time evolution of the expanding fireball formed in such collisions, escaping freely without final-state interaction. This includes detailed investigations of low-mass vector mesons in their di-electron decay channel. In the simulation studies we investigate the feasibility 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. Simulation results with most-up-to date realistic detector response as well as detailed background studies will be presented.
|On behalf of collaboration:||CBM|
Claudia Hoehne (U) Tetyana Galatyuk (Goethe University / EMMI)