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T: Fachverband Teilchenphysik
T 65: Trigger+DAQ 2
T 65.3: Vortrag
Mittwoch, 6. März 2024, 16:30–16:45, Geb. 30.23: 3/1
Commissioning and Validation of the jFEX ETmiss Algorithm for the ATLAS Level-1 Trigger — Anamika Aggarwal, Volker Büscher, Ralf Gugel, Moritz Hesping, Christian Kahra, Emanuel Meuser, •Niklas Schmitt, and Duc Bao Ta — Johannes Gutenberg-University, Mainz
During the last long shutdown of the LHC, the ATLAS level-1 calorimeter trigger underwent a major upgrade to cope with increased event rates when running at higher energies and instantaneous luminosity during Run 3 and beyond. As part of this phase-1 upgrade, a new system of feature extractor modules was implemented. These modules receive inputs from the calorimeters with finer granularity and execute more advanced algorithms. The new Jet Feature EXtractor (jFEX) reconstructs jets, tau-leptons, forward electrons and energy sums, including ETmiss . A big improvement compared to the Run 2 trigger is a new event-by-event pile-up correction. The latter provides a real-time correction for in-time pile-up that leads to additional energy deposits in the calorimeters. The commissioning of the new system, along with the performance validation using early Run 3 data, is crucial to assure optimal data-taking conditions.
This talk will give an overview about the calibration of the new jFEX ETmiss trigger as well as the parameter optimization for the pile-up correction algorithm. Furthermore, efficiency- and rate measurements based on 2023 proton-proton data are presented.