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A search for the rare decay of a charged B meson into a charged K meson, a neutrino and an anti-neutrino /

The document describes a search for the rare decay B¯ → K¯vv̄ in a data set of about 230 millions of BB̄ pairs recorded by the BABAR detector at the PEP-II B Factory, via the process e⁺e⁻ → ϒ(4S) → BB̄. The method used selects events in which the B+ meson is fully reconstructed, and looks for a K¯ in the rest of the event. This is accomplished by applying kinematical and topological restrictions that select B¯ → K¯vv̄ events with the largest possible efficiency, while rejecting a maximum amount of background events. The number of background events is estimated from data and from simulated events, while the value of the selection efficiency relies solely on the simulation of B¯ → K¯vv̄ decays in the BABAR detector. These two numbers are required in order to set an upper limit on the branching ratio. We analyze a subset of the data sample and provide an interpretation of the result.

Identiferoai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:QMM.101133
Date January 2006
CreatorsHarnois-Déraps, Joachim.
PublisherMcGill University
Source SetsLibrary and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada
LanguageEnglish
Detected LanguageEnglish
TypeElectronic Thesis or Dissertation
Formatapplication/pdf
CoverageMaster of Science (Department of Physics.)
Rights© Joachim Harnois-Déraps, 2006
Relationalephsysno: 002602919, proquestno: AAIMR32712, Theses scanned by UMI/ProQuest.

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