Abstract

The compressed baryonic matter (CBM) experiment at the future FAIR facility near Darmstadt, Germany, will investigate baryonic matter at highest net-baryon densities but moderate temperatures by colliding nuclei at beam energies from 10 to 45 A GeV. Among the key observables are low-mass vector mesons and charmonium decaying into lepton pairs as they leave the hot and dense fireball without further interactions, thus providing undisturbed information from this early dense phase of the collision. In this paper, investigations for both decay channels, di-electrons and di-muons are presented in terms of detector concepts, simulations and feasibility studies.

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