Date of Award
1-1-2024
Document Type
Thesis
Degree Name
M.S. in Physics
First Advisor
Jake V. Bennett
Second Advisor
Cecille Labuda
Third Advisor
Gavin Davies
School
University of Mississippi
Relational Format
dissertation/thesis
Abstract
An inclusive measurement of ϒ(4S) decays to ϒ(1S) is reported. Using 364.5 fb−1 of Belle II data collected at the ϒ(4S) center-of-mass energy, ϒ(4S) → ϒ(1S) decays are identified via a fit to the μ+μ− invariant mass spectrum. Backgrounds from initial state radiation production of ϒ(1S) are subtracted using a fit to 42.6 fb−1 of data collected below the ϒ(4S) center-of-mass energy. Using our models and values taken from literature, the inclusive branching ratio for inclusive ϒ(4S) decays to ϒ(1S) can be measured with a statistical uncertainty of 5.1% and a systematic uncertainty of 14.8%.
Recommended Citation
Stacy, John Wilson, "Inclusive Measurement of Upsilon(4S) To Upsilon(1S) Decays with Belle II Data" (2024). Electronic Theses and Dissertations. 2980.
https://egrove.olemiss.edu/etd/2980