SMuK 2023 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 122: DAQ Systems

T 122.3: Vortrag

Donnerstag, 23. März 2023, 16:20–16:35, POT/0106

Online Track Reconstruction for the Mu3e Experiment — •Haris Avudaiyappan Murugan for the Mu3e collaboration — Institute of Nuclear Physics, Johannes Gutenberg University of Mainz, Germany

The Mu3e experiment aims to observe or exclude the rare decay of a positive muon into two positrons and an electron. Such an observation would be a violation of charged lepton flavour conservation and thus a clear signal of new physics. In the first phase, it will observe 10⁸ muon decays per second using a thin pixel detector complemented by scintillating timing detectors. The data rate from the detector subsystems is estimated at about 100 Gb/s and is mostly comprised of background processes from other decay channels of the muon. To store the data for physics analysis, it needs to be reduced by a factor of 100. This can be achieved by selecting the potential signal events through online track and vertex reconstruction on graphics processing units (GPUs). The talk discusses the algorithm employed on the GPUs and the achieved performance.