University of Illinois Urbana-Champaign

Photoproduction of D(*,+/-) and D(0) mesons

Jaross, Glen Richard

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Description

Title
Photoproduction of D(*,+/-) and D(0) mesons
Author(s)
Jaross, Glen Richard
Issue Date
1991
Doctoral Committee Chair(s)
Wiss, J.E.
Department of Study
Physics, Elementary Particles and High Energy
Discipline
Physics, Elementary Particles and High Energy
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Physics, Elementary Particles and High Energy
Language
eng
Abstract
  • The charmed mesons D$\sp\circ$ and D$\sp{\*\pm}$ have been observed in photon-nucleus collisions at the FNAL Wide Band Laboratory. A sample of 5500 inclusive D$\sp\circ$ events and 1400 $\rm D\sp{\*\pm} \to D\sp\circ\pi\sp\pm$ events were used to study charm production mechanisms and D$\sp\circ$ meson decay dynamics.
  • The cross section for producing D$\sp\circ$ and D$\sp{\*\pm}$ mesons has been measured in the K$\sp\pm\pi\sp\mp$ and K$\sp\pm\pi\sp-\pi\sp+\pi\sp\mp$ decay modes of the D$\sp\circ$ meson as a function of incident photon energy and Feynman x. The results agree reasonably well with previous measurements.
  • The mean lifetime of the D$\sp\circ$ meson has been measured as: $\tau\sb{D}$ = 0.431 $\pm$.010 $\pm$.023 picoseconds using a sample of 2913 $\pm$ 101 events. The decay $\rm D\sp{\*\pm}\to (K\sp+K\sp-)\pi\sp\pm$ has been observed at a level of 56 $\pm$ 14 events, and its branching ratio was calculated to be$${\Gamma(D\sp{\*\pm} \to (K\sp+K\sp-)\pi\sp\pm)\over \Gamma(D\sp{\*\pm} \to (K\sp+\pi\sp-)\pi)} = .118 \pm .032$$The decay D$\sp\circ\to\pi\sp+\pi\sp-\pi\sp+\pi\sp-$ was also observed. Its branching ratio$${\Gamma(D\sp\circ \to \pi\sp+\pi\sp-\pi\sp+\pi\sp-)\over \Gamma(D\sp\circ \to K\sp+\pi\sp-\pi\sp+\pi\sp-)} = .114 \pm .026$$was calculated on the basis of 235 $\pm$ 43 events.
Type of Resource
text
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http://hdl.handle.net/2142/23521
Copyright and License Information
Copyright 1991 Jaross, Glen Richard

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