{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/35207"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/35207","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Measurement of W Boson Polarization in Top Quark Decay","abstract":"A measurement of the polarization of the W boson from top quark decay is an excellent test of the V-A form of the charged-current weak interaction in the standard model. Since the longitudinal W boson is intimately related to the electroweak symmetry breaking mechanism, and the standard model gives a specific prediction for the fraction longitudinal W bosons from top decays, it is of particular interest for study. This thesis presents a measurement of W boson polarization in top quark decays through an analysis of the co9 distribution in the lepton-plus-jets channel of the tt candidate events from pp collisions at (see document for equation). This measurement uses an integrated luminosity of (see document) of data collection with the CDF Run II detector, resulting in 31 tt candidate events with at least one identified 5 jet. Using a binned likelihood fit to the co9 distribution from the tt candidate events found in this sample, the fraction of W bosons with longitudinal polarization is determined to be (equation. This result is consistent with the standard model prediction, gives a top quark mass of 174.3 GeV/e2, of (see document).","abstract_html":"A measurement of the polarization of the W boson from top quark decay is an excellent test of the V-A form of the charged-current weak interaction in the standard model. Since the longitudinal W boson is intimately related to the electroweak symmetry breaking mechanism, and the standard model gives a specific prediction for the fraction longitudinal W bosons from top decays, it is of particular interest for study. This thesis presents a measurement of W boson polarization in top quark decays through an analysis of the co9 distribution in the lepton-plus-jets channel of the tt candidate events from pp collisions at (see document for equation). This measurement uses an integrated luminosity of (see document) of data collection with the CDF Run II detector, resulting in 31 tt candidate events with at least one identified 5 jet. Using a binned likelihood fit to the co9 distribution from the tt candidate events found in this sample, the fraction of W bosons with longitudinal polarization is determined to be (equation. This result is consistent with the standard model prediction, gives a top quark mass of 174.3 GeV/e2, of (see document).","abstract_has_math":false,"creators":["Vickey, Trevor Neil"],"institution":null,"degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Physics","degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2012,"date_issued":"2012-11-11T17:57:23Z","date_published":"2012-11-11T17:57:23Z","updated_at":"2026-07-22T22:25:31Z","subjects":["Polarization; Quark; W-Boson, electroweak; boson; gluon; qcd; fitter; non-w; mistag; chamber-calibration; wireplane; muon; five-dimentional; vertex; hardonization; scintillator; dark-current; source-runs"],"languages":["en"],"rights":["© 2004 Neil"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/2142/35207","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:creator","label":"Author","values":["Vickey, Trevor Neil"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2012-11-11T17:57:23Z","10000-01-01","2004"]},{"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":["Polarization; Quark; W-Boson, electroweak; boson; gluon; qcd; fitter; non-w; mistag; chamber-calibration; wireplane; muon; five-dimentional; vertex; hardonization; scintillator; dark-current; source-runs"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["© 2004 Neil"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/35207"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["A measurement of the polarization of the W boson from top quark decay is an excellent test of the V-A form of the charged-current weak interaction in the standard model. Since the longitudinal W boson is intimately related to the electroweak symmetry breaking mechanism, and the standard model gives a specific prediction for the fraction longitudinal W bosons from top decays, it is of particular interest for study. This thesis presents a measurement of W boson polarization in top quark decays through an analysis of the co9 distribution in the lepton-plus-jets channel of the tt candidate events from pp collisions at (see document for equation). This measurement uses an integrated luminosity of (see document) of data collection with the CDF Run II detector, resulting in 31 tt candidate events with at least one identified 5 jet. Using a binned likelihood fit to the co9 distribution from the tt candidate events found in this sample, the fraction of W bosons with longitudinal polarization is determined to be (equation. This result is consistent with the standard model prediction, gives a top quark mass of 174.3 GeV/e2, of (see document).","Submitted by Elias Lopez (erlopez2@illinois.edu) on 2012-11-11T17:57:23Z No. of bitstreams: 1 Vickey_Trevor_Neil.pdf: 1688153 bytes, checksum: 18ee306db6834fbdc0c5191d41e0e8ed (MD5)","Made available in DSpace on 2012-11-11T17:57:23Z (GMT). No. of bitstreams: 1 Vickey_Trevor_Neil.pdf: 1688153 bytes, checksum: 18ee306db6834fbdc0c5191d41e0e8ed (MD5) Previous issue date: 2004","Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Elias Lopez (erlopez2@illinois.edu) on 2012-11-14T02:37:09Z Item is restricted indefinitely.","Restriction data tranferred 2014-07-01T11:35:26-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: Publisher has not yet granted open access permission","Publisher has not yet granted open access permission","U of I Only"]},{"key":"dc:title","label":"Title","values":["Measurement of W Boson Polarization in Top Quark Decay"]}]}],"canonical_facts":{"dc:creator":["Vickey, Trevor Neil"],"dc:date":["2012-11-11T17:57:23Z","10000-01-01","2004"],"dc:description":["A measurement of the polarization of the W boson from top quark decay is an excellent test of the V-A form of the charged-current weak interaction in the standard model. Since the longitudinal W boson is intimately related to the electroweak symmetry breaking mechanism, and the standard model gives a specific prediction for the fraction longitudinal W bosons from top decays, it is of particular interest for study. This thesis presents a measurement of W boson polarization in top quark decays through an analysis of the co9 distribution in the lepton-plus-jets channel of the tt candidate events from pp collisions at (see document for equation). This measurement uses an integrated luminosity of (see document) of data collection with the CDF Run II detector, resulting in 31 tt candidate events with at least one identified 5 jet. Using a binned likelihood fit to the co9 distribution from the tt candidate events found in this sample, the fraction of W bosons with longitudinal polarization is determined to be (equation. This result is consistent with the standard model prediction, gives a top quark mass of 174.3 GeV/e2, of (see document).","Submitted by Elias Lopez (erlopez2@illinois.edu) on 2012-11-11T17:57:23Z No. of bitstreams: 1 Vickey_Trevor_Neil.pdf: 1688153 bytes, checksum: 18ee306db6834fbdc0c5191d41e0e8ed (MD5)","Made available in DSpace on 2012-11-11T17:57:23Z (GMT). No. of bitstreams: 1 Vickey_Trevor_Neil.pdf: 1688153 bytes, checksum: 18ee306db6834fbdc0c5191d41e0e8ed (MD5) Previous issue date: 2004","Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Elias Lopez (erlopez2@illinois.edu) on 2012-11-14T02:37:09Z Item is restricted indefinitely.","Restriction data tranferred 2014-07-01T11:35:26-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: Publisher has not yet granted open access permission","Publisher has not yet granted open access permission","U of I Only"],"dc:identifier":["http://hdl.handle.net/2142/35207"],"dc:language":["en"],"dc:rights":["© 2004 Neil"],"dc:subject":["Polarization; Quark; W-Boson, electroweak; boson; gluon; qcd; fitter; non-w; mistag; chamber-calibration; wireplane; muon; five-dimentional; vertex; hardonization; scintillator; dark-current; source-runs"],"dc:title":["Measurement of W Boson Polarization in Top Quark Decay"],"dc:type":["Dissertation / Thesis","text"],"thesis:degree_discipline":["Physics"],"thesis:degree_level":["Dissertation"],"thesis:degree_name":["Ph.D."]},"updated_at":"2026-07-22T22:25:31Z"}