Karlsruhe 2024 – scientific programme
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T: Fachverband Teilchenphysik
T 65: Trigger+DAQ 2
T 65.1: Talk
Wednesday, March 6, 2024, 16:00–16:15, Geb. 30.23: 3/1
Optimization of the Level-1 Tau Trigger at ATLAS for Run 3 — •Philipp Rincke1, 2, Stan Lai1, and Arnaud Ferrari2 — 1II. Physikalisches Institut, Georg-August-Universität Göttingen, Deutschland — 2Department of Physics and Astronomy, Uppsala University, Sweden
The Level-1 calorimeter trigger system of the ATLAS detector was updated for Run 3 of the LHC, including the introduction of the electron feature extractor (eFEX) and jet feature extractor (jFEX). For tau signatures, both the eFEX and jFEX reconstruct tau objects, which are referred to as eTAUs and jTAUs respectively.
By geometrically matching the eTAUs and jTAUs in a topological processor, combined tau objects (cTAU) are reconstructed in the Level-1 Trigger. This allows to combine the better energy resolution of eTAUs with the larger isolation area of jTAUs. So far the tau isolation criterion has not been optimized for cTAUs and the proposed cTAU trigger items have not been commissioned. In this talk, the current status of the investigations to optimize the isolation criterion for cTAUs are presented.
Keywords: Tau; Calorimeter; Level-1; ATLAS