Heidelberg 2022 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 16: Experimental Methods (general) 1
T 16.8: Vortrag
Montag, 21. März 2022, 18:00–18:15, T-H29
ATLAS Primary Vertexing with ACTS — •Bastian Schlag1,2, Andreas Salzburger1, Markus Elsing1, Christian Schmitt2, and Volker Büscher2 — 1CERN — 2Johannes Gutenberg-Universität Mainz
The reconstruction of particle trajectories and their associated vertices is a crucial task in the event reconstruction of most high energy physics experiments. In order to maintain or even improve upon the current performance of tracking and vertexing algorithms under the upcoming challenges of increasing energies and ever increasing luminosities in the future, major software upgrades are required.
Based on the well-tested ATLAS tracking and vertexing software, the ACTS (A Common Tracking Software) project aims to provide a standalone, modern and experiment-independent toolkit of track- and vertex reconstruction software, specifically designed for parallel code execution.
The newly developed ACTS vertexing software suite provides thread-safe, highly performant and state-of-the-art vertex reconstruction tools that have been fully integrated and validated in the ATLAS software framework AthenaMT. Due to its superb physics and CPU performance, the ACTS vertexing software will be used as the default primary vertex reconstruction tool in ATLAS for LHC Run 3.
Additionally, an entirely new vertex seed finding algorithm with great physics performance and CPU speed-ups of up to a factor of 100 in high pile-up environments has been developed and implemented in ACTS.
This talk presents an overview of the ACTS vertexing software suite, its performance in ATLAS as well as latest developments.