Determination of the CKM element (Vub)

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dc.contributor.author Fortin, Domininque
dc.date.accessioned 2009-12-14T23:05:48Z
dc.date.available 2009-12-14T23:05:48Z
dc.date.copyright 2005 en
dc.date.issued 2009-12-14T23:05:48Z
dc.identifier.uri http://hdl.handle.net/1828/1971
dc.description.abstract The precise determination of the CKM matrix element |Vub| is crucial in testing the Standard Model mechanism for CP violation. From a sample of 88 million BB pairs collected with the MBAR detector, charmless semileptonic B decays are selected using simultaneous requirements on the electron energy, Ee, and the invariant mass squared of the electron-neutrino pair, q2. The partial branching fraction, unfolded for detector effects, is determined in a region of the q2-Ee plane where the dominating semileptonic decays to charm mesons are highly suppressed. Theoretical calculations based on the Heavy Quark Expansion allows for a determination of |Vub| = (3.95 ± 0.27 +0.58 -0:42 ± 0.25) x 10 3, where the errors represent experimental, heavy quark parameters and theoretical uncertainties, respectively. en
dc.language English eng
dc.language.iso en en
dc.rights Available to the World Wide Web en
dc.subject particles en
dc.subject leotons en
dc.subject nuclear physics en
dc.subject.lcsh UVic Subject Index::Sciences and Engineering::Physics en
dc.title Determination of the CKM element (Vub) en
dc.type Thesis en
dc.contributor.supervisor Kowalewski, Robert
dc.degree.department Dept. of Physics and Astronomy en
dc.degree.level Doctor of Philosophy Ph.D. en

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