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Mainz 2022 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 45: Heavy-Ion Collisions and QCD Phases IX

HK 45.3: Talk

Wednesday, March 30, 2022, 16:45–17:00, HK-H1

Feasibility Studies of Di-Electron Spectroscopy with CBM at FAIR — •Cornelius Feier-Riesen for the CBM collaboration — GSI, Darmstadt, Germany — Justus-Liebig-Universität Gießen, Gießen, Germany

The Compressed Baryonic Matter experiment (CBM) at FAIR is designed to explore the QCD phase diagram at high net baryon densities and moderate temperatures by means of heavy ion collisions with energies from 2-11 AGeV beam energy (Au+Au collisions) and interaction rates up to 10 MHz, provided by the SIS100 accelerator.

Leptons as penetrating probes not taking part in the strong interaction leave the fireball without being modified thus carrying information from the dense baryonic matter. However, di-leptons are rare probes therefore calling for high efficiency and high purity identification capabilities. In CBM, electron identification will be performed by a Ring Imaging Cherenkov Detector (RICH) and by a Transition Radiation Detector (TRD).

In this contribution, feasibility studies of di-electron spectroscopy from low mass vector meson decays will be presented. Special emphasis is put on the experimental challenge to reduce the combinatorial background in order to get a high significance of the extracted di-electron signal.

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