2021/01/01 by Simon Akar, S. Akar, Gowtham Atluri +14 · 3 citations
Engineering · Mathematics · Physics and Astronomy · #Algorithm #Artificial intelligence #Atlas (anatomy) #Bridging (networking) #Computer science #Deep learning #Engineering #Estimator #Feature (linguistics) #Fidelity #High fidelity #High-Energy Particle Collisions Research #Kernel (algebra) #Large Hadron Collider #Machine learning #Mathematics #Monte Carlo method #Particle Detector Development and Performance #Particle physics #Particle physics theoretical and experimental studies #Physics #Variety (cybernetics) #hep-ex #physics.data-an
paper · pdf · doi:10.1051/epjconf/202125104012
published in EPJ Web of Conferences 251, 04012 (EDP Sciences)
openalex publication_date 2021/01/01 · arxiv created 2021/07/05 · arxiv updated 2021/09/08 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
The locations of proton-proton collision points in LHC experiments are called primary vertices (PVs). Preliminary results of a hybrid deep learning algorithm for identifying and locating these, targeting the Run 3 incarnation of LHCb, have been described at conferences in 2019 and 2020. In the past year we have made significant progress in a variety of related areas. Using two newer Kernel Density Estimators (KDEs) as input feature sets improves the fidelity of the models, as does using full LHCb simulation rather than the “toy Monte Carlo” originally (and still) used to develop models. We have also built a deep learning model to calculate the KDEs from track information. Connecting a tracks-to-KDE model to a KDE-to-hists model used to find PVs provides a proof-of-concept that a single deep learning model can use track information to find PVs with high efficiency and high fidelity. We have studied a variety of models systematically to understand how variations in their architectures affect performance. While the studies reported here are specific to the LHCb geometry and operating conditions, the results suggest that the same approach could be used by the ATLAS and CMS experiments.