Combinatorial Kalman Filter and High Level Trigger Reconstruction for the Belle II Experiment 1st Edition by Nils Braun ISBN 3030249964 978-3030249960

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Product details:

ISBN 10: 3030249964
ISBN 13: 978-3030249960
Author: Nils Braun

Combinatorial Kalman filters are a standard tool today for pattern recognition and charged particle reconstruction in high energy physics. In this thesis the implementation of the track finding software for the Belle II experiment and first studies on early Belle II data are presented. The track finding algorithm exploits novel concepts such as multivariate track quality estimates to form charged trajectory hypotheses combining information from the Belle II central drift chamber with the inner vertex sub-detectors. The eventual track candidates show an improvement in resolution on the parameters describing their spatial and momentum properties by up to a factor of seven over the former legacy implementation. The second part of the thesis documents a novel way to determine the collision event null time T0 and the implementation of optimisation steps in the online reconstruction code, which proved crucial in overcoming the high level trigger limitations.

Table of contents:

Introduction
Experimental Setup
Foundations
Fast Reconstruction for the High Level Trigger
Event Timing
Combinatorial Kalman Filter
Conclusion
Bibliography

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Tags:

Nils Braun,Combinatorial,Kalman Filter,High Level