{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/19653"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/19653","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"A search for top quarks in proton-antiproton collisions using dileptons","abstract":"A search for tt pairs in pp collisions with a center of mass energy $\\sqrt s$ = 1.8TeV is presented. The analysis looks for tt pairs which decayed through the chain $\\bar {tt}\\to W\\sp+bW\\sp-\\bar b\\to\\ell\\sp+\\bar \\nu b\\ell\\sp-\\nu\\bar b$ where one of the b quarks is explicitly identified. In a sample of 109.4 $\\pm$ 7.2 pb$\\sp{-1}$ of data, 6 tags in 4 events are found with an expected background of 1.53 $\\pm$.33 events. This results in an estimated production cross section of 4.6$\\sbsp{-3.1}{+4.4}$ pb at $m\\sb{top}$ = 175 GeV/$c\\sp2.$","abstract_html":"A search for tt pairs in pp collisions with a center of mass energy $\\sqrt s$ = 1.8TeV is presented. The analysis looks for tt pairs which decayed through the chain $\\bar {tt}\\to W\\sp+bW\\sp-\\bar b\\to\\ell\\sp+\\bar \\nu b\\ell\\sp-\\nu\\bar b$ where one of the b quarks is explicitly identified. In a sample of 109.4 $\\pm$ 7.2 pb$\\sp{-1}$ of data, 6 tags in 4 events are found with an expected background of 1.53 $\\pm$.33 events. This results in an estimated production cross section of 4.6$\\sbsp{-3.1}{+4.4}$ pb at $m\\sb{top}$ = 175 GeV/$c\\sp2.$","abstract_has_math":true,"creators":["Martin, Andrew James"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Physics","degree_department":null,"school":null,"contributors":["Errede, Steven M."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2011,"date_issued":"2011-05-07T12:14:15Z","date_published":"2011-05-07T12:14:15Z","updated_at":"2026-07-22T22:25:14Z","subjects":["Physics, Elementary Particles and High Energy"],"languages":["eng"],"rights":["Copyright 1996 Martin, Andrew James"],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["9780591088700","AAI9702600","(UMI)AAI9702600"],"render_values":[{"text":"9780591088700","href":null,"code":true},{"text":"AAI9702600","href":null,"code":true},{"text":"(UMI)AAI9702600","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/19653","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Errede, Steven M."]},{"key":"dc:creator","label":"Author","values":["Martin, Andrew James"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2011-05-07T12:14:15Z","10000-01-01","1996"]},{"key":"dc:type","label":"Dc Type","values":["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."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Physics, Elementary Particles and High Energy"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["eng"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 1996 Martin, Andrew James"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["9780591088700","AAI9702600","(UMI)AAI9702600","http://hdl.handle.net/2142/19653"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["A search for tt pairs in pp collisions with a center of mass energy $\\sqrt s$ = 1.8TeV is presented. The analysis looks for tt pairs which decayed through the chain $\\bar {tt}\\to W\\sp+bW\\sp-\\bar b\\to\\ell\\sp+\\bar \\nu b\\ell\\sp-\\nu\\bar b$ where one of the b quarks is explicitly identified. In a sample of 109.4 $\\pm$ 7.2 pb$\\sp{-1}$ of data, 6 tags in 4 events are found with an expected background of 1.53 $\\pm$.33 events. This results in an estimated production cross section of 4.6$\\sbsp{-3.1}{+4.4}$ pb at $m\\sb{top}$ = 175 GeV/$c\\sp2.$","Made available in DSpace on 2011-05-07T12:14:15Z (GMT). No. of bitstreams: 2 license.txt: 4922 bytes, checksum: 910b249b4beec47e7ab768910c8f966f (MD5) 9702600.pdf: 4847462 bytes, checksum: d3791a283145bbe31cdedb3e8667b68b (MD5) Previous issue date: 1996","Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Howard Ding (hding2@illinois.edu) on 2011-05-07T14:38:31Z Item is restricted indefinitely.","Restriction data tranferred 2014-07-01T11:16:04-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: ETDs are only available to UIUC Users without author permission","ETDs are only available to UIUC Users without author permission","U of I Only"]},{"key":"dc:title","label":"Title","values":["A search for top quarks in proton-antiproton collisions using dileptons"]}]}],"canonical_facts":{"dc:contributor":["Errede, Steven M."],"dc:creator":["Martin, Andrew James"],"dc:date":["2011-05-07T12:14:15Z","10000-01-01","1996"],"dc:description":["A search for tt pairs in pp collisions with a center of mass energy $\\sqrt s$ = 1.8TeV is presented. The analysis looks for tt pairs which decayed through the chain $\\bar {tt}\\to W\\sp+bW\\sp-\\bar b\\to\\ell\\sp+\\bar \\nu b\\ell\\sp-\\nu\\bar b$ where one of the b quarks is explicitly identified. In a sample of 109.4 $\\pm$ 7.2 pb$\\sp{-1}$ of data, 6 tags in 4 events are found with an expected background of 1.53 $\\pm$.33 events. This results in an estimated production cross section of 4.6$\\sbsp{-3.1}{+4.4}$ pb at $m\\sb{top}$ = 175 GeV/$c\\sp2.$","Made available in DSpace on 2011-05-07T12:14:15Z (GMT). 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