Implementation of ACTS into sPHENIX Track Reconstruction

Journal Article · 11 October 2021 · Computing and Software for Big Science

DOI: https://doi.org/10.1007/s41781-021-00068-w · OSTI ID:1825575

Osborn, Joseph D. ; Frawley, Anthony D.; Huang, Jin; Lee, Sookhyun; Costa, Hugo Pereira Da; Peters, Michael; Pinkenburg, Christopher; Roland, Christof; Yu, Haiwang

Abstract sPHENIX is a high energy nuclear physics experiment under construction at the Relativistic Heavy Ion Collider at Brookhaven National Laboratory (BNL). The primary physics goals of sPHENIX are to study the quark-gluon-plasma, as well as the partonic structure of protons and nuclei, by measuring jets, their substructure, and heavy flavor hadrons in $$p$$ $p$ $$+$$ $+$ $$p$$ $p$ , p + Au, and Au + Au collisions. sPHENIX will collect approximately 300 PB of data over three run periods, to be analyzed using available computing resources at BNL; thus, performing track reconstruction in a timely manner is a challenge due to the high occupancy of heavy ion collision events. The sPHENIX experiment has recently implemented the A Common Tracking Software (ACTS) track reconstruction toolkit with the goal of reconstructing tracks with high efficiency and within a computational budget of 5 s per minimum bias event. This paper reports the performance status of ACTS as the default track fitting tool within sPHENIX, including discussion of the first implementation of a time projection chamber geometry within ACTS.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: Commissariat a l'Energie Atomique (CEA); National Science Foundation (NSF); USDOE Office of Science (SC), Nuclear Physics (NP)
• Grant/Contract Number: AC05-00OR22725; SC0011088; SC0012704; SC0013393
• OSTI ID: 1825575
• Journal Information: Computing and Software for Big Science, Journal Name: Computing and Software for Big Science Journal Issue: 1 Vol. 5; ISSN 2510-2036
• Publisher: Springer Science + Business MediaCopyright Statement
• Country of Publication: Germany
• Language: English