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Title: Angular analysis of the B0 to K*0μ+μ- decay at the LHCb experiment
Author: Kress, Felix Johannes
ISNI:       0000 0004 9357 0984
Awarding Body: Imperial College London
Current Institution: Imperial College London
Date of Award: 2020
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An angular analysis of the B0 → K*0 (→ K+μ-) μ+μ- decay is presented in this thesis. The measurement uses a data set corresponding to an integrated luminosity of 4.7fb-1 of pp collision data collected with the LHCb detector during the years 2011, 2012 and 2016. Angular observables are determined in bins of the invariant dimuon mass squared using an unbinned maximum likelihood fit, in which contamination from decays with the K+μ- system in an S-wave configuration is taken into account. The results of the observables are the most precise to date, reducing the uncertainty with respect to the previous LHCb measurements by approximately 30%. The tension that was previously observed with the Standard Model predictions persists, and studies with the FLAVIO software package indicate a slight increase in the tension. However, the precise value depends on the choice of theory nuisance parameters.
Supervisor: Patel, Mitesh ; Egede, Ulrik Sponsor: Science and Technology Facilities Council
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral