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http://hdl.handle.net/2123/5827
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| Title: | Semileptonic B Decays to Light Neutral Hadrons: B to pi0 l nu and B to eta l nu |
| Authors: | Cole, Shoshanna Beth |
| Keywords: | Belle Collaboration Vub KEK-B semileptonic B decays B to pi0 l nu heavy to light transitions B to pi0lnu B to eta l nu CKM matrix B to etalnu pi0lnu b to ulnu etalnu ulnu semileptonic decays |
| Issue Date: | May-2007 |
| Publisher: | School of Physics University of Sydney. |
| Abstract: | An 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. |
| Description: | Master of Science |
| URI: | http://hdl.handle.net/2123/5827 |
| Rights and Permissions: | The author retains copyright of this thesis. |
| Type of Work: | Masters Thesis |
| Appears in Collections: | Sydney Digital Theses (Open Access) |
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