PoS - Proceedings of Science
Volume 414 - 41st International Conference on High Energy physics (ICHEP2022) - Poster Session
Improved track reconstruction for prompt and long-lived particles in ATLAS for the LHC Run 3
D. Muñoz Pérez*  on behalf of the ATLAS Collaboration
Full text: pdf
Pre-published on: November 24, 2022
Published on: June 15, 2023
In preparation for the LHC Run 3, the ATLAS experiment at the LHC has completed a major effort to improve the track reconstruction performance for prompt and long-lived particles. Resource consumption was halved while expanding the charged-particle reconstruction capacity. Large- radius track reconstruction, targeting long-lived particles, was optimized to run in all events expanding the potential phase-space of these searches. The detector alignment precision was improved to avoid limiting factors for precision measurements of Standard Model processes. Mixture density networks and simulating radiation damage effects improved the position estimate of charged particles overlapping in the ATLAS pixel detector, bolstering downstream algorithms’ performance. The Adaptative Multi-Vertex Finder replaced the Iterative Vertex Finder for primary vertex reconstruction, improving the vertex reconstruction efficiency in high pile-up environments like such expected for the LHC Run 3. This contribution highlights the above achievements and reports on the readiness of the ATLAS detector for Run 3 collisions at 13.6 TeV.
DOI: https://doi.org/10.22323/1.414.1078
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