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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
Author(s):Ferrante, Andrew
Director of Research:Errede, Steve; Martinez Outschoorn, Verena
Doctoral Committee Chair(s):Peng, Jen-Chief
Doctoral Committee Member(s):Cooper, Lance
Department / Program:Physics
Discipline:Physics
Degree Granting Institution:University of Illinois at Urbana-Champaign
Degree:Ph.D.
Genre:Dissertation
Subject(s):LHC
ATLAS
BSM
Beyond the Standard Model
Higgs Physics
Exotic Search
Scalar
Pseudoscalar
Z Boson
Di-lepton
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.
Issue Date:2018-12-07
Type:Thesis
URI:http://hdl.handle.net/2142/102492
Rights Information:(C) 2018 by Andrew Ferrante. All rights reserved.
Date Available in IDEALS:2019-02-06
Date Deposited:2018-12


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