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dc.contributor.advisorJawahery, Abolhassanen_US
dc.contributor.authorHamilton, Brian Keithen_US
dc.date.accessioned2013-07-06T05:30:11Z
dc.date.available2013-07-06T05:30:11Z
dc.date.issued2012en_US
dc.identifier.urihttp://hdl.handle.net/1903/14329
dc.description.abstractI present a measurement of the inclusive semileptonic branching fraction of the B<sub>s</sub> meson and B<sub>s</sub> production rates relative to all B mesons using a data set collected with the BaBar detector at the PEP-II asymmetric energy electron-positron collider operating at center-of-mass energies above the Upsilon(4S) resonance. The quantities are extracted simultaneously using inclusive yields of phi mesons and phi mesons in coincidence with a high momentum lepton. The B<sub>s</sub> semileptonic branching fraction is found to be B(B<sub>s<\sub> &rarr; l &nu; X) = (9.5<sup>+2.5</sup><sub>-2.0</sub><sup>+1.1</sup><sub>-1.9</sub>)%, where the first uncertainty is statistical and the second is systematic. Additionally, I present measurements of antideuteron production using the BaBar data collected at collision center-of-mass energies corresponding to the masses of the Upsilon(2S), Upsilon(3S), and Upsilon(4S) resonances. Measurements of specific ionization for charged tracks in the \babar\ detector are used to obtain the antideuteron production rate in decays of the Upsilon(1S), Upsilon(2S), and Upsilon(3S) resonances as well as in continuum e<sup>+</sub>e<sup>-</sup> annihilation to hadrons. The total rates observed in the data are B(Upsilon(2S) &rarr; dbar X) = (2.62 &plusmn; 0.10<sup>+0.31</sup><sub>-0.28</sub>)&times; 10<sup>-5</sup>, B(Upsilon(1S) &rarr; dbar X) = (2.85 &plusmn; 0.47<sup>+0.21</sup><sub>-0.29</sub>)&times; 10<sup>-5</sup>, B(Upsilon(3S) &rarr; dbar X) = (2.45 &plusmn; 0.14<sup>+0.27</sup><sub>-0.24</sub>)&times; 10<sup>-5</sup>, and the cross section for antideuteron production in continuum e<sup>+</sub>e<sup>-</sup> annihilation is found to be &sigma;(e<sup>+</sub>e<sup>-</sup> (10.58 GeV) &rarr; dbar X) = (10.49 &plusmn; 0.33<sup>+1.28</sup><sub>-1.14</sub>) fb. No significant production in Upsilon(4S) decays is observed.en_US
dc.titleStudies of B_s Production and Semileptonic Decay, and of Antideuteron Production in Upsilon Decay and Quark Fragmentation at BaBaren_US
dc.typeDissertationen_US
dc.contributor.publisherDigital Repository at the University of Marylanden_US
dc.contributor.publisherUniversity of Maryland (College Park, Md.)en_US
dc.contributor.departmentPhysicsen_US
dc.subject.pqcontrolledParticle physicsen_US
dc.subject.pquncontrolledantideuteronen_US
dc.subject.pquncontrolledbabaren_US
dc.subject.pquncontrolledB_sen_US
dc.subject.pquncontrolleddeuteronen_US
dc.subject.pquncontrolledsemileptonicen_US
dc.subject.pquncontrolledupsilonen_US


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