Využití kinematicky podmíněných rozpadů v alignmentu detektoru Belle 2.

Kaplan, Martin

This thesis is a Monte Carlo study of several distinct samples and some of their combinations for track-based alignment of tracking detectors at the Belle II experiment. Simultaneous alignment of drift chamber layers, vertex detector sensors including their deformation parameters and vertex detector half-shells is performed using a set of linear constraints. Samples of muon tracks from cosmic rays, muon pairs from the e+ e− → µ+ µ− process with and without the inter- action point vertex constraint and muon pairs from the kinematic-constrained J/Ψ → µ+ µ− decay are studied. Performance of certain combinations of sam- ples in the alignment procedure of the tracking detectors is analyzed. One combination of samples is identified as a suitable sample for the alignment of the real detector, which started its operation in spring 2019 and thus the results of this thesis present a first comprehensive analysis of systematic and statistical errors associated with a realistic scenario of the Belle II detector. 1

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