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dc.contributor.authorCole, Shoshanna Beth
dc.date.accessioned2010-01-27
dc.date.available2010-01-27
dc.date.issued2007-05-01
dc.identifier.urihttp://hdl.handle.net/2123/5827
dc.descriptionMaster of Scienceen_AU
dc.description.abstractAn analysis of B to pi0 l nu and B to eta l nu decays using the neutrino reconstruction technique is presented. The dataset consists of 535 million BB pairs in 492 fb^−1 of data collected with the Belle detector at the KEKB asymmetric e+e− collider. The measured B to pi0 l nu and B to eta l nu branching fractions are B(B to pi0 l nu) = (0.68 ± 0.09 ± 0.11 ± 0.04)×10^−4 and B(B to eta l nu) = (0.42 ± 0.13)×10^−4. The errors on the pi0 measurement are statistical, experimental systematic, and due to b to u l nu modelling, respectively; that on the eta is statistical only. The B to pi0 l nu branching fraction is measured in three q^2 bins: q^2 < 8 GeV^2, 8 GeV^2 ≤ q^2 < 16 GeV^2, and 16 GeV^2 ≤ q^2. The Cabibbo-Kobayashi-Maskawa quark-mixing matrix element |Vub| is extracted from the B to pi0 l nu branching fraction using a Light-Cone Sum Rules form factor extrapolated to the full q^2 range, and is found to be |Vub| = (3.29 ± 0.23 ± 0.27 ± 0.05)×10^−3, where the errors are statistical, experimental systematic, and theoretical, respectively.en_AU
dc.publisherSchool of Physicsen_AU
dc.publisherUniversity of Sydney.en_AU
dc.rightsThe author retains copyright of this thesis.
dc.rights.urihttp://www.library.usyd.edu.au/copyright.html
dc.subjectBelle Collaborationen_AU
dc.subjectVuben_AU
dc.subjectKEK-Ben_AU
dc.subjectsemileptonic B decaysen_AU
dc.subjectB to pi0 l nuen_AU
dc.subjectheavy to light transitionsen_AU
dc.subjectB to pi0lnuen_AU
dc.subjectB to eta l nuen_AU
dc.subjectCKM matrixen_AU
dc.subjectB to etalnuen_AU
dc.subjectpi0lnuen_AU
dc.subjectb to ulnuen_AU
dc.subjectetalnuen_AU
dc.subjectulnuen_AU
dc.subjectsemileptonic decaysen_AU
dc.titleSemileptonic B Decays to Light Neutral Hadrons: B to pi0 l nu and B to eta l nuen_AU
dc.typeMasters Thesisen_AU
dc.date.valid2007-01-01en_AU


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