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HK: Fachverband Hadronen und Kerne

HK 68: Heavy Ion Collisions and QCD phases

HK 68.1: Gruppenbericht

Donnerstag, 19. März 2009, 16:30–17:00, H-ZO 10

The Compressed Baryonic Matter experiment at FAIR: Progress with feasibility studies and detector developments. — •Johann M. Heuser — GSI Darmstadt

The CBM experiment is being planned at the international research center FAIR, under realization next to the GSI laboratory. Its physics programme addresses the QCD phase diagram in the region of highest net baryon densities. Of particular interest are the expected first order phase transition from partonic to hadronic matter, ending in a critical point, and modifications of hadron properties in the dense medium as a signal of chiral symmetry restoration.

Laid out as a fixed-target experiment at the synchrotrons SIS100/300, the detector will record both proton-nucleus and nucleus-nucleus collisions at beam energies up to 45 AGeV. Hadronic, leptonic and photonic observables have to be measured with large acceptance. The interaction rates will reach 10 MHz to measure extremely rare probes like charm near threshold. Two versions of the experiment are being studied, optimized for either electron-hadron or muon identification, combined with silicon detector based charged-particle tracking and micro-vertex detection.

The CBM physics requires the development of novel detector sytems, trigger and data acquisition concepts as well as innovative real-time reconstruction techniques. Progress with feasibility studies of the experiment and the development of its detector systems will be discussed.

* Supported by EU-FP6 HadronPhysics