{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/102492"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/102492","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Direct search for exotic spin zero particles in the di-lepton final state of Higgs-Z associated production in sqrt(s) = 13 TeV pp collisions","abstract":"This thesis presents a search for a new exotic spin-0 particle a in 36.47 fb^(-1) of sqrt(s) = 13 TeV pp collisions recorded by the ATLAS detector at the LHC. This analysis is part of a broader search for a H ==> aa ==> bbbb, which uses a Higgs produced in association with a weak vector boson to improve triggering on events. The channel considered here uses Higgs-Z---associated production with two leptons in the final state. The analysis uses a likelihood-fit profile of a multivariate discriminant to place 95% confidence limit upper bounds on the cross section of the proposed signal. A study of the performance of the ATLAS Tile Calorimeter in extremely energetic events is also presented.","abstract_html":"This thesis presents a search for a new exotic spin-0 particle a in 36.47 fb^(-1) of sqrt(s) = 13 TeV pp collisions recorded by the ATLAS detector at the LHC. This analysis is part of a broader search for a H ==> aa ==> bbbb, which uses a Higgs produced in association with a weak vector boson to improve triggering on events. The channel considered here uses Higgs-Z---associated production with two leptons in the final state. The analysis uses a likelihood-fit profile of a multivariate discriminant to place 95% confidence limit upper bounds on the cross section of the proposed signal. A study of the performance of the ATLAS Tile Calorimeter in extremely energetic events is also presented.","abstract_has_math":false,"creators":["Ferrante, Andrew"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Physics","degree_department":null,"school":null,"contributors":["Errede, Steve","Martinez Outschoorn, Verena","Peng, Jen-Chief","Cooper, Lance"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2019,"date_issued":"2019-02-06T19:36:38Z","date_published":"2019-02-06T19:36:38Z","updated_at":"2026-07-22T22:24:42Z","subjects":["LHC","ATLAS","BSM","Beyond the Standard Model","Higgs Physics","Exotic Search","Scalar","Pseudoscalar","Z Boson","Di-lepton"],"languages":["en"],"rights":["(C) 2018 by Andrew Ferrante. 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All rights reserved."],"dc:subject":["LHC","ATLAS","BSM","Beyond the Standard Model","Higgs Physics","Exotic Search","Scalar","Pseudoscalar","Z Boson","Di-lepton"],"dc:title":["Direct search for exotic spin zero particles in the di-lepton final state of Higgs-Z associated production in sqrt(s) = 13 TeV pp collisions"],"dc:type":["text"],"thesis:degree_discipline":["Physics"],"thesis:degree_level":["Dissertation"],"thesis:degree_name":["Ph.D."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:24:42Z"}