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FNAL Tevatron Production of charm mesons by high energy neutrons Dissertation / Thesis text Wiss, J.E. Shipbaugh, Calvin Leroy 2011-05-17T15:17:12Z 2011-05-17T15:17:12Z 10000-01-01 1988 "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." Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-05-17T15:17:12Z No. of bitstreams: 1 1988_shipbaugh.pdf: 4830038 bytes, checksum: a703c1769d46c1985cbb7352009855e0 (MD5) Made available in DSpace on 2011-05-17T15:17:12Z (GMT). No. of bitstreams: 1 1988_shipbaugh.pdf: 4830038 bytes, checksum: a703c1769d46c1985cbb7352009855e0 (MD5) Previous issue date: 1988 Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Carolyn Mead (cmead2@illinois.edu) on 2011-05-17T15:17:12Z Item is restricted indefinitely. Restriction data tranferred 2014-07-01T11:13:42-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: Thesis Thesis U of I Only 3478307 http://hdl.handle.net/2142/23910 en 1988 Calvin Leroy Shipbaugh charm mesons high energy neutrons neutron-nucleus collisions Physics Physics University of Illinois at Urbana-Champaign Dissertation Ph.D.