This thesis describes an experimental investigation of semileptonic B meson decays with a D and pi mesons in the final state: B- → D+pi -e-nu e. The data for the analysis were collected with the CLEO II detector at the Cornell Electron-positron Storage Ring. The D meson is reconstructed in the D+ → K-pi+pi+ channel. The advantage of using this particular B decay mode is that there is no contribution from the D* due to phase space exclusion. This analysis is the first attempt at measuring non-resonant decays semileptonic decays with the CLEO II detector. Even though we do not distinguish between higher order D resonances and the so called non-resonant decays, measuring this decay channel reveals useful information about the deficit observed in inclusive charm semileptonic B decays. We present the full neutrino reconstruction method used in extracting this decay channel from our data sample. The main difficulty comes in understanding combinatoric backgrounds and we develop two methods to solve this problem. After extensive study, no statistically significant signal is observed. So an upper limit is extracted. The result we obtain is B (B- → D +pi-e- nue) < 0.71% at 90% C.L. This is consistent with the expected amount of B - → D+pi- e-nu e events predicted by the current models.
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:QMM.36617 |
| Date | January 2000 |
| Creators | Janicek, René. |
| Contributors | Patel, Popat M. (advisor) |
| Publisher | McGill University |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Format | application/pdf |
| Coverage | Doctor of Philosophy (Department of Physics.) |
| Rights | All items in eScholarship@McGill are protected by copyright with all rights reserved unless otherwise indicated. |
| Relation | alephsysno: 001763806, proquestno: NQ64583, Theses scanned by UMI/ProQuest. |
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