A parametrized Kalman filter for fast track fitting at LHCb

• Verfasst von: Billoir, Pierre [VerfasserIn]
• Verfasst von: Günther, Paul André [VerfasserIn]
• Verfasst von: Stemmle, Simon [VerfasserIn]
• Titel: A parametrized Kalman filter for fast track fitting at LHCb
• Verf.angabe: P. Billoir, M. De Cian, P.A. Günther, S. Stemmle
• E-Jahr: 2021
• Jahr: 7 May 2021
• Umfang: 7 S.
• Teil: volume:265
• Teil: year:2021
• Teil: day:9
• Teil: elocationid:108026
• Teil: pages:1-7
• Teil: extent:7
• Fussnoten: Available online 7 May 2021 ; Gesehen am 16.07.2021
• Titel Quelle: Enthalten in: Computer physics communications / Program library
• Ort Quelle: Amsterdam : Elsevier Science, 2001
• Jahr Quelle: 2021
• Band/Heft Quelle: 265(2021) vom: 9., Artikel-ID 108026, Seite 1-7
• DOI: doi:10.1016/j.cpc.2021.108026
• Datenträger: Online-Ressource
• Sprache: eng
• Sach-SW: Kalman filter
• Sach-SW: LHCb experiment
• Sach-SW: Track reconstruction
• K10plus-PPN: 1763021831

Abstract

We present an alternative implementation of the Kalman filter employed for track fitting within the LHCb experiment. It uses simple parametrizations for the extrapolation of particle trajectories in the field of the LHCb dipole magnet and for the effects of multiple scattering in the detector material. A speedup of more than a factor of four is achieved while maintaining the quality of the estimated track quantities. This Kalman filter implementation could be used in the purely software-based trigger of the LHCb upgrade.