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dc.contributor.advisorClarke, Peter
dc.contributor.advisorClark, Philip
dc.contributor.authorFardell, Gemma Claire
dc.date.accessioned2013-09-25T12:05:02Z
dc.date.available2013-09-25T12:05:02Z
dc.date.issued2013-07-01
dc.identifier.urihttp://hdl.handle.net/1842/7849
dc.description.abstractThis thesis presents a measurement of the effective B0s decay width, ΓFS, from a single exponential fit to the flavour-specific decay channel B0s → D-s π +. This measurement is based on an integrated luminosity of 340 pb-1 recorded by LHCb in 2011 at a center of mass energy of 7TeV. The dataset is divided into two exclusive selections. B0s → D-s (( ϕ →K-K+) π-)π + only has a significant background contribution arising from combinatorial background, and the modelling of this is determined entirely by the data. B0s → D-s ((K-K* (892)0 → K+ π-))π + has a larger contribution from combinatoric and mis-identified background and provides an alternative measurement. A simultaneous fit for the effective B0s decay width is performed to both the datasets leading to the result: ΓFS = 0:668 ± 0:017 ± 0:031 ps-1 The result is then combined with information from the LHCb B0s → J/ψØ analysis leading to an improved measurement of the average B0 s decay width: Γs = 0:666 ± 0:010 ± 0:031 ps-1en_US
dc.contributor.sponsorScience and Technology Facilities Council (STFC)en_US
dc.language.isoenen_US
dc.publisherThe University of Edinburghen_US
dc.subjectlifetimesen_US
dc.subjectBs mesonen_US
dc.subjectLHCben_US
dc.subjectLarge Hadron Collideren_US
dc.titleMeasurement of the e ffective lifetime of the B0 s meson using the flavour speci fic decay Bs → D-s π + at the LHCb experiment.en_US
dc.typeThesis or Dissertationen_US
dc.type.qualificationlevelDoctoralen_US
dc.type.qualificationnamePhD Doctor of Philosophyen_US


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