Dortmund 2021 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 96: DAQ, Trigger and Electronics IV
T 96.7: Vortrag
Donnerstag, 18. März 2021, 17:30–17:45, Tu
Real-time reconstruction for the LHCb upgrade — •Peilian Li for the LHCb collaboration — Heidelberg University, Heidelberg, Germany
In 2022, the upgraded LHCb experiment will begin data taking with an instantaneous luminosity increased by a factor of five, from 4×1032 to 2×1033 cm−1s−1. The lowest level trigger in previous runs, a hardware-based trigger will be removed, requiring the first stage of the software trigger to process events at the non-empty LHC bunch-crossing rate of 30 MHz instead of the previous rate of 1 MHz. To cope with the unprecedentedly high event rate, an offline-quality real-time reconstruction is implemented in the second stage of the software trigger, with the integration of a real-time alignment and calibration. Thus the analysis will be performed on physics objects produced directly at the trigger level. This gives fast access to the data without the need for reprocessing and allows to store only objects relevant for specific analysis, which in turn significantly reduces the size of the stored events.
In this talk, we present an overview of the LHCb trigger to be used during Run 3 and its performance.