{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/45423"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/45423","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"A search for Z' bosons in the dimuon decay channel in 8 TeV proton-proton collisions","abstract":"In this thesis, I present a search for $Z'$ bosons in the $\\mu^+\\mu^-$ decay channel using 20 fb$^{-1}$ of $p$-$p$ collisions at $\\sqrt{s} = 8 $ TeV, produced during the 2012 run at the Large Hadron Collider at CERN, using the ATLAS detector to record the collision products. The search proceeds via a comparison of the reconstructed dimuon invariant mass distribution with the expected distribution, given Standard Model only sources of background. In addition to the ``official'' ATLAS dimuon selection, I present a new dimuon selection, designed for this analysis, whose purpose is to increase the sensitivity of the search relative to the official selection. I observe no statistically significant deviation from the Standard Model expectation, and proceed to place new lower limits on the masses of $Z'$ bosons inspired by the $E_6$ Grand Unified Theory.","abstract_html":"In this thesis, I present a search for $Z&#x27;$ bosons in the <span class=\"etd-inline-math\">&mu;<sup>+</sup>&mu;<sup>-</sup></span> decay channel using 20 fb<span class=\"etd-inline-math\"><sup>-1</sup></span> of $p$-$p$ collisions at $\\sqrt{s} = 8 $ TeV, produced during the 2012 run at the Large Hadron Collider at CERN, using the ATLAS detector to record the collision products. The search proceeds via a comparison of the reconstructed dimuon invariant mass distribution with the expected distribution, given Standard Model only sources of background. In addition to the ``official&#x27;&#x27; ATLAS dimuon selection, I present a new dimuon selection, designed for this analysis, whose purpose is to increase the sensitivity of the search relative to the official selection. I observe no statistically significant deviation from the Standard Model expectation, and proceed to place new lower limits on the masses of $Z&#x27;$ bosons inspired by the <span class=\"etd-inline-math\">E<sub>6</sub></span> Grand Unified Theory.","abstract_has_math":true,"creators":["Coggeshall, James"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Physics","degree_department":null,"school":null,"contributors":["Liss, Tony M.","Errede, Steven M.","Cooper, S. Lance","El-Khadra, Aida X."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2013,"date_issued":"2013-08-22T16:39:43Z","date_published":"2013-08-22T16:39:43Z","updated_at":"2026-07-22T22:25:34Z","subjects":["Large Hadron Collider (LHC)","European Organization for Nuclear Research (CERN)","Argonne Tandem Linear Accelerator System (ATLAS)","Z'","dilepton resonances","muon resolution"],"languages":["en"],"rights":["Copyright 2013 James Coggeshall"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/2142/45423","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Liss, Tony M.","Errede, Steven M.","Cooper, S. 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The search proceeds via a comparison of the reconstructed dimuon invariant mass distribution with the expected distribution, given Standard Model only sources of background. In addition to the ``official'' ATLAS dimuon selection, I present a new dimuon selection, designed for this analysis, whose purpose is to increase the sensitivity of the search relative to the official selection. I observe no statistically significant deviation from the Standard Model expectation, and proceed to place new lower limits on the masses of $Z'$ bosons inspired by the $E_6$ Grand Unified Theory.","Item withdrawn by Mark Zulauf (zulauf@illinois.edu) on 2013-06-21T14:32:37Z Item was in collections: University of Illinois Theses & Dissertations (ID: 1) No. of bitstreams: 1 Coggeshall_James.pdf: 7604951 bytes, checksum: 116d265ff25fb575dd293b9f8ab36d2b (MD5)","Made available in DSpace on 2013-08-22T16:39:43Z (GMT). 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In addition to the ``official'' ATLAS dimuon selection, I present a new dimuon selection, designed for this analysis, whose purpose is to increase the sensitivity of the search relative to the official selection. I observe no statistically significant deviation from the Standard Model expectation, and proceed to place new lower limits on the masses of $Z'$ bosons inspired by the $E_6$ Grand Unified Theory.","Item withdrawn by Mark Zulauf (zulauf@illinois.edu) on 2013-06-21T14:32:37Z Item was in collections: University of Illinois Theses & Dissertations (ID: 1) No. of bitstreams: 1 Coggeshall_James.pdf: 7604951 bytes, checksum: 116d265ff25fb575dd293b9f8ab36d2b (MD5)","Made available in DSpace on 2013-08-22T16:39:43Z (GMT). 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