Studies of the Belle II vertex detector physics performance

Sumitted to PubDB: 2025-10-10

Category: Master Thesis

Tags: PXD

Principal Authors	Zdenek Dolezal, Tadeas Bilka
Non-Belle II authors	T. Wilczek
Date	2025-01-05
Belle II Number	BELLE2-MTHESIS-2025-020
Abstract	The goal of this thesis is to study the performance of the Belle II vertex detector. The first part gives a brief physics motivation and introduces the Belle II experiment, then the entire detector is described. The following chapter explains the parametrization used. Then the performance of the detector is examined using muons from cosmic radiation while its magnetic field was turned off shortly after PXD commissioning. The next chapter uses muons from collisions to study the detector. It starts with a Monte Carlo simulation and then follows by comparing it to recent data measured during the year 2024. And at the end the resolution of the detector while PXD was turned off was determined. The outcome of the thesis is the resolution of the detector and a python script that can be used to verify the performance of the detector in the future.