Production of charm mesons by high energy neutrons
type: CreativeWork
description: "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."
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."
author: Shipbaugh, Calvin Leroy
language: en
keywords: FNAL Tevatron, charm mesons, high energy neutrons, neutron-nucleus collisions
date published: 2011-05-17T15:17:12Z
date modified: 2026-07-22T22:25:22Z
provider: University of Illinois - Urbana-Champaign
publisher: Networked Digital Library of Theses and Dissertations
type: WebPage
source organization: University of Illinois - Urbana-Champaign

PropertyValue
property ID: Handle
value: http://hdl.handle.net/2142/23910