Schmolz, Pascal (2024): Measurement of the Υ(4S) → B⁰ anti-B⁰ branching fraction at the Belle experiment = Messung des Verzweigungsverhältnisses (4S) → B⁰ anti-B⁰ am Belle Experiment. Dissertation, LMU München: Faculty of Physics |
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Abstract
B factories are electron-positron accelerators whose purpose is to generate the highest possible number of B mesons. The centre-of-mass energy of the collision is set to produce a Υ(4S) resonance with the highest probability. The short-lived state consisting of a bottom and an antibottom quark subsequently decays predominantly into a pair of B mesons. The available energy and the conservation of charge result in a decay to either a pair of uncharged or charged B mesons. The rate at which either a charged or uncharged pair is created is of decisive importance for a variety of precision measurements. From an experimental point of view, it is often more advantageous to determine physical quantities in ratios instead of determining them directly. This dissertation, by contrast, addresses the direct measurement of the branching fraction of the decay Υ(4S) → B⁰ anti-B⁰. For this purpose, a data set recorded at the Belle experiment with an integrated luminosity of 571 inverse femtobarn is analysed.
Item Type: | Theses (Dissertation, LMU Munich) |
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Keywords: | high energy physics, flavor physics, belle experiment, branching fraction, isospin symmetry |
Subjects: | 500 Natural sciences and mathematics 500 Natural sciences and mathematics > 530 Physics |
Faculties: | Faculty of Physics |
Language: | English |
Date of oral examination: | 26. July 2024 |
1. Referee: | Kuhr, Thomas |
MD5 Checksum of the PDF-file: | 415453203b0ae34c581cc9b11cd98f46 |
Signature of the printed copy: | 0001/UMC 30835 |
ID Code: | 34151 |
Deposited On: | 22. Nov 2024 14:43 |
Last Modified: | 22. Nov 2024 14:43 |