Online Selection of J/ψ → μ+μ− Decays in the CBM Experiment

The Compressed Baryonic Matter (CBM) experimental setup is currently being constructed at the Facility for Antiproton and Ion Research (FAIR) acceleration complex at GSI (Darmstadt, Germany) by an international collaboration that includes a team from JINR. One of the main goals of this experiment is to study the charmonium production in high-energy nuclear collisions. The experiment will operate at extreme interaction rates of up to 10 MHz. The expected dataflow rate will be of the order of 1 TB/s, making it impossible to store all the raw data from detectors in long-term buffers. It will demand the selection of J/ψ → μ+μ− decays in real-time. This paper presents criteria for the fast and effective selection of signal events by using exclusively data on charged muon hits collected in the Muon Chamber (MUCH) coordinate stations and describes the software implementing these criteria. The possibility of this software to solve the problem of the online selection J/ψ → μ+μ− decays is proven.

Abstract licence: CC BY

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