{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/23910"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/23910","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Production of charm mesons by high energy neutrons","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.\"","abstract_html":"&quot;The charmed mesons D&quot;&quot;&#x27;±, 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&quot;&quot;&#x27;±-+ D°1r± with the subsequent decay mode D°-+ K+ K-. The cross section per nucleon for D&quot;&quot;&#x27;±, at most probable energy ...;s = 35 GeV, was measured to be: d:(xf) . BR = 2.11 ± .43 (±.63)JLb/nucleon Xf for 0.0 &lt; x f &lt; 0.14 (xf = .07). The branching ratio (BR) is defined as: BR =BR(D&#x27;&quot;&quot; -+ 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&gt;1r±. The differential cross section for D; production averaged over the particle and antiparticle states is: 1 (dO&#x27;(D+) dO&#x27;(D-») BR· &quot;&quot;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&gt;n&#x27;), and a linear A dependence was assumed.&quot;","abstract_has_math":false,"creators":["Shipbaugh, Calvin Leroy"],"institution":null,"degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Physics","degree_department":null,"school":null,"contributors":["Wiss, J.E."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2011,"date_issued":"2011-05-17T15:17:12Z","date_published":"2011-05-17T15:17:12Z","updated_at":"2026-07-22T22:25:22Z","subjects":["FNAL Tevatron","charm mesons","high energy neutrons","neutron-nucleus collisions"],"languages":["en"],"rights":["1988 Calvin Leroy Shipbaugh"],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["3478307"],"render_values":[{"text":"3478307","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/23910","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Wiss, J.E."]},{"key":"dc:creator","label":"Author","values":["Shipbaugh, Calvin Leroy"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2011-05-17T15:17:12Z","10000-01-01","1988"]},{"key":"dc:type","label":"Dc Type","values":["Dissertation / Thesis","text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Physics"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph.D."]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["FNAL Tevatron","charm mesons","high energy neutrons","neutron-nucleus collisions"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["1988 Calvin Leroy Shipbaugh"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["3478307","http://hdl.handle.net/2142/23910"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["\"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"]},{"key":"dc:title","label":"Title","values":["Production of charm mesons by high energy neutrons"]}]}],"canonical_facts":{"dc:contributor":["Wiss, J.E."],"dc:creator":["Shipbaugh, Calvin Leroy"],"dc:date":["2011-05-17T15:17:12Z","10000-01-01","1988"],"dc: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.\"","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"],"dc:identifier":["3478307","http://hdl.handle.net/2142/23910"],"dc:language":["en"],"dc:rights":["1988 Calvin Leroy Shipbaugh"],"dc:subject":["FNAL Tevatron","charm mesons","high energy neutrons","neutron-nucleus collisions"],"dc:title":["Production of charm mesons by high energy neutrons"],"dc:type":["Dissertation / Thesis","text"],"thesis:degree_discipline":["Physics"],"thesis:degree_level":["Dissertation"],"thesis:degree_name":["Ph.D."]},"updated_at":"2026-07-22T22:25:22Z"}