Speaker
Description
Abstract: The High-Luminosity LHC (HL-LHC) will impose unprecedented demands on event reconstruction, driven by extreme pile-up conditions, increased detector granularity, and stringent latency constraints. In this environment, track reconstruction stands out as one of the most critical and computationally challenging components of future trigger systems, directly impacting physics performance and the efficiency of trigger-level event selection.
To address these challenges, the CERN Next Generation Triggers project is devoting significant effort to rethinking trigger-level track reconstruction algorithms, software architectures, and computing models, with the goal of ensuring scalability, robustness, and sustained physics performance throughout the HL-LHC era. A key aspect is the increased tight coupling between online and offline track reconstruction, which blurs the traditional boundaries between them and have broader implications for WLCG preparation for HL-LHC.
This presentation highlights selected, concrete developments in trigger-level track reconstruction within the ATLAS and CMS experiments, focusing on innovative solutions tailored to HL-LHC conditions. Topics include the evolution of tracking strategies, algorithmic simplifications and refactorings driven by compute resources constraints, the adoption of heterogeneous computing architectures such as GPUs and FPGAs, as well as new approaches based on machine learning techniques.
Speaker Bio: Noemi Calace is a staff physicist at CERN, working on the ATLAS Experiment at the Large Hadron Collider. She earned her PhD in Particle Physics from the University of Geneva in 2018, focusing on detector layout optimisation, track reconstruction, and physics performance for the ATLAS Phase-II Inner Tracker. Her research focuses on tracking algorithms and detector upgrades for the ATLAS tracking detector in preparation for the High-Luminosity LHC. She has held several leadership roles within ATLAS, including co-convener of the Upgrade Tracking and Inner Detector Tracking groups, and is currently the ATLAS Reconstruction Coordinator.