University of Illinois Urbana-Champaign

Production of charm mesons by high energy neutrons

Shipbaugh, Calvin Leroy

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https://hdl.handle.net/2142/23910

Description

Title
Production of charm mesons by high energy neutrons
Author(s)
Shipbaugh, Calvin Leroy
Issue Date
1988
Doctoral Committee Chair(s)
Wiss, J.E.
Department of Study
Physics
Discipline
Physics
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
  • charm mesons
  • high energy neutrons
  • neutron-nucleus collisions
  • FNAL Tevatron
Language
en
Abstract
"The charmed mesons D""'±, DO, and D; have been observed in neutron-nucleus collisions at the FNAL Tevatron. A sample of 134 ± 19 events was investigated in the decay D""'±-+ D°1r± with the subsequent decay mode D°-+ K+ K-. The cross section per nucleon for D""'±, at most probable energy ...;s = 35 GeV, was measured to be: d:(xf) . BR = 2.11 ± .43 (±.63)JLb/nucleon Xf for 0.0 < x f < 0.14 (xf = .07). The branching ratio (BR) is defined as: BR =BR(D'"" -+ D1r) x BR(D -+ K+ K-). The dependence of the cross section per nucleus on number of nucleons in the target was fit to a form A a and it was found that a = .96 .17. A sample of 64 ±.16 D; events was investigated for the decay D; -+ 4>1r±. The differential cross section for D; production averaged over the particle and antiparticle states is: 1 (dO'(D+) dO'(D-») BR· ""2 dx fS + dx / = 2.85 ± 0.80 ± .86 JLb/nucleon at x f = 0.175 where the first error is statistical and the second error is systematic. The branching fraction is defined as BR =BR(Ds -+ 4>n'), and a linear A dependence was assumed."
Type of Resource
text
Permalink
http://hdl.handle.net/2142/23910
Copyright and License Information
1988 Calvin Leroy Shipbaugh

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