Abstract
The CBM experiment will study strongly interacting matter at high net-baryon densities with nuclear collisions up to 45A GeV beam energy at the future FAIR facility. With interaction rates unprecedented in heavy-ion collisions, CBM will give access also to extremely rare probes and thus to the early stage of the collisions, in search for the first-order phase transition from confined to deconfined matter and the QCD critical point. The CBM physics programme will be started with beams delivered by the SIS-100 synchrotron, providing energies from 2 to 11 GeV/nucleon for heavy nuclei, up to 14 GeV/nucleon for light nuclei, and 30 GeV for protons. The highest net baryon densities will be explored with ion beams up to 45 GeV/nucleon energy delivered by SIS-300 in a later stage of the FAIR project.After several years of preparation, the CBM experiment now enters the realisation phase. In this article, we report on the current status of the system developments and the expected physics performance for strange and charmed observables, as well as on the roadmap towards the first data taking.
Highlights
In parallel to the investigation of strongly interacting matter at the highest energy densities achievable in the terrestrial laboratory as currently performed with the heavy-ion programme at the CERN-LHC, an increasing number of experimental projects address heavy-ion collisions at moderate energies, corresponding roughly to the beam energy range of BNL-AGS and CERNSPS
We report on the current status of the system developments and the expected physics performance for strange and charmed observables, as well as on the roadmap towards the first data taking
Heavy-ion reactions in this energy range allow us to explore a region of the phase diagram of strongly interacting matter which has recently attracted renewed interest since it may bear a rich structure
Summary
A key feature of the CBM design considerations is the capability to operate at very high interaction rates of up to 107 collisions per second – several orders of magnitude higher than any other existing or currently planned heavy-ion experiment. This high-rate capability will give CBM a unique discovery potential for extremely rare probes like multi-strange anti-hyperons, exotic hadronic states, or charm production near the kinematic threshold.
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