This thesis presents measurements of the branching fractions of the charmless baryonic decays B(s) → p anti-p h+ h'-, where h(') denotes a kaon or a pion. Three new modes (B → p anti-p pi+ pi-, Bs → p anti-p K+ K- and Bs → p anti-p K+(-) pi-(+)) are observed for the first time and evidence is found for a fourth (B → p anti-p K+ K-). The inclusive branching fraction of B → p anti-p K+(-) pi-(+) is measured for the first time and the upper limit is set on the branching fraction of the Bs → p anti-p pi+ pi- decay. This represents the first observation of four-body charmless baryonic decays of a Bs meson and one of the first observations of baryonic Bs decays. The implementation of the real-time alignment of LHCb's vertex detector is also described. The novel real-time alignment and calibration strategy adopted by LHCb is essential to allow more stable data taking conditions and an optimal 'offline-quality' reconstruction to be performed at the trigger level, ensuring more efficient trigger selections and the possibility to perform physics analyses directly on the trigger output.
| Identifer | oai:union.ndltd.org:bl.uk/oai:ethos.bl.uk:727982 |
| Date | January 2017 |
| Creators | Dujany, Giulio |
| Contributors | Parkes, Christopher |
| Publisher | University of Manchester |
| Source Sets | Ethos UK |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Source | https://www.research.manchester.ac.uk/portal/en/theses/realtime-alignment-of-the-lhcb-vertex-detector-and-observation-of-charmless-baryonic-decays-bs--p-antip-h-h(1d6d02fd-f23a-4bbb-80a1-ad8ad4eeb390).html |
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