Abstract
The CBM experiment will investigate highly compressed baryonic matter created in A+A collisions at the new FAIR research center. With a beam energy range up to 11 AGeV for the heaviest nuclei at the SIS 100 accelerator, CBM will investigate the QCD phase diagram in the intermediate range, i.e. at moderate temperatures but high net-baryon densities. This intermediate range of the QCD phase diagram is of particular interest, because a first order phase transition ending in a critical point and possibly new highdensity phases of strongly interacting matter are expected. In this range of the QCD phase diagram only exploratory measurements have been performed so far. CBM, as a next generation, high-luminosity experiment, will substantially improve our knowledge of matter created in this region of the QCD phase diagram and characterize its properties by measuring rare probes such as multi-strange hyperons, dileptons or charm, but also with event-by-event fluctuations of conserved quantities, and collective flow of identified particles. The experimental preparations with special focus on hadronic observables and strangeness is presented in terms of detector development, feasibility studies and fast track reconstruction. Preparations are progressing well such that CBM will be ready with FAIR start. As quite some detectors are ready before, they will be used as upgrades or extensions of already running experiments allowing for a rich physics program prior to FAIR start.
Highlights
The CBM experiment will investigate highly compressed baryonic matter created in A+A collisions at the new FAIR research center
Heavy ion collisions in this energy range create matter at energy densities that reach beyond the critical density of about 1 GeV/fm3
The CBM experiment is being prepared in order to characterize the dense baryonic matter created in heavy-ion collisions at FAIR by measuring a wide variety of observables including rare probes such as multistrange particles, charm and dileptons
Summary
This region of the phase diagram is predicted to have rich structures like e.g. new exotic phases as the quarkyonic matter [5] or a first order phase transition and a critical point, see e.g. Heavy ion collisions in this energy range create matter at energy densities that reach beyond the critical density of about 1 GeV/fm. The CBM experiment is being prepared in order to characterize the dense baryonic matter created in heavy-ion collisions at FAIR by measuring a wide variety of observables including rare probes such as multistrange particles, charm (if the energy is sufficient) and dileptons
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