SMuK 2023 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 36: Computing I

HK 36.1: Talk

Wednesday, March 22, 2023, 15:45–16:00, SCH/A117

ALICE TRD: online-offline processing and electron identification in LHC Run 3 and 4 — •Felix Schlepper — Physikalisches Institut, Heidelberg, Deutschland

During the long shutdown 2 (LS2) of the LHC, the ALICE experiment was upgraded to exploit the full scientific potential. The upgrade was posed by the challenge of continuously reading out and online processing p-p and Pb-Pb collisions at rates of 1 MHz and 50 kHz, respectively. To meet these new requirements, the ALICE experiment developed a new online-offline software framework O2 for Run 3 and 4.

This talk will give an overview of the software, the calibration and particle identification (PID) strategies currently being implemented and commissioned for the Transition Radiation Detector (TRD). The TRD contributes to the electron identification capabilities of ALICE. In Run 1 and 2 a classical likelihood-based algorithm was used. Since the front end electronics (FEE) was upgraded, the data readout precision was notably reduced to cope with the higher rates. Hence, new algorithms for PID, including Machine Learning, will be used to recover and possibly improve the previous PID capabilities. First performance results will be shown as well.