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HK: Fachverband Physik der Hadronen und Kerne

HK 55: Heavy-Ion Collisions and QCD Phases XIII

HK 55.3: Vortrag

Mittwoch, 13. März 2024, 18:00–18:15, HBR 62: EG 03

Improved electron identification in CBM RICH^* — •Pavish Subramani for the CBM collaboration — Bergische Universität Wuppertal, Germany

The Compressed Baryonic Matter(CBM) experiment is a future fixed target experiment built as part of FAIR phase-1 at GSI, Darmstadt. The aim of the CBM experiment is to probe the QCD phase diagram at high baryonic densities and moderate temperatures by means of heavy ion collisions. Since the electrons are least affected by the QCD strong interactions, the di-electron channel is ideal to probe the dense fireball forming in such collisions. CBM features a Ring Imaging Cherenkov Detector (RICH) to efficiently identify those electrons up to 6 GeV/c with a pion suppression factor in the order of 100.

This talk will focus on recent improvements in the electron identification performance of the CBM RICH, where the machine learning technique used for ring-track matching is improved by changing the MLP to xGBoost. Further, the possibility of using CBM’s Transition Radiation Detector (TRD), which is downstream of the RICH, as an intermediate tracker is discussed. Particularly, the use of this tracker to eliminate rings from secondary electrons not stemming from the target region is evaluated.
^*Work supported by GSI, BMBF 05P21PXFC1, “Netzwerke 2021”, an initiative of the Ministry of Culture and Science of the State of Northrhine Westphalia.

Keywords: Electron identification; CBM RICH; Backtracking; MLP; Quark gluon plasma