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Title: Rare hadronic decays of charged B mesons at LHCb
Author: Hadavizadeh, Thomas
ISNI:       0000 0004 7430 7267
Awarding Body: University of Oxford
Current Institution: University of Oxford
Date of Award: 2018
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This thesis documents two searches for rare hadronic decays of B+ mesons with the LHCb experiment at the Large Hadron Collider. Both are performed using proton-proton collision data corresponding to an integrated luminosity of 4.8 fb-1, collected at centre-of-mass energies of 7, 8 and 13 TeV during 2011-2016. The first is a search for B+ → Ds+K+K- decays. A significant signal is observed for the first time and the branching fraction is determined to be B(B+ → Ds+K+K-) = (7.1 ± 0.5 ± 0.6 ± 0.7) x 10-6, where the first uncertainty is statistical, the second systematic and the third due to the uncertainty on the branching fraction of the normalisation mode B+ → Ds+D0. The second search is performed for the rare pure annihilation decay B+ → Ds+φ. No significant signal is observed and a limit of B(B+ → Ds+φ) < 4.9 x 10-7 is set on the branching fraction at 95% confidence level.
Supervisor: John, Malcolm Sponsor: Science and Technology Facilities Council
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available
Keywords: Particle Physics ; LHCb ; Physics ; Flavour Physics