This thesis presents a study of inclusive production of charmonium mesons at the U (4S) resonance ( s = 10.58 GeV) and in the continuum up to 50 MeV below the resonance. The full dataset of BABAR Run 1 (an integrated luminosity of 23.3 fb-1) is used in the analysis. / The branching fractions of B mesons to J/ y , y (2S), cc1 and cc2 are measured: BB→J/yX = (1.044 +/- 0.013 +/- 0.035)%, BB→y2S X = (0.274 +/- 0.020 +/- 0.029)%, BB→cc1X = (0.378 +/- 0.034 +/- 0.026)% and BB→cc2X < 0.21%. By equating the y (2S) production rates calculated using the y (2S) → ℓ+ℓ- final state to those using y (2S) → pi+pi- J/ y , we obtain competitive measurements of the y (2S) → ℓ+ℓ- branching fractions: By2S →e+e- = (0.815 +/- 0.090 +/- 0.090)% and By2S →m+m- = (0.700 +/- 0.083 +/- 0.093)%. The cross-section for J/ y production in e+e - annihilation in the continuum is measured to be: se+e-→J/yX = (2.47 +/- 0.21 +/- 0.20) pb. This cross-section excludes J/ y mesons from B decays, two-photon or initial state radiation processes. An upper limit on the inclusive non-BB¯ J/ y decays of the U (4S) is set at BU4S →J/yX < 5.1 x 10-4, for J/ y with the center of mass momentum above 2 GeV/c. The helicity, the center of mass production angle distribution and the center of mass momentum distribution of the reconstructed J/ y mesons are presented.
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:QMM.38083 |
| Date | January 2001 |
| Creators | Milek, Marko. |
| Contributors | Patel, Popat (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: 001846179, proquestno: NQ75661, Theses scanned by UMI/ProQuest. |
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