A search for Z' bosons in the dimuon decay channel in 8 TeV proton-proton collisions
Coggeshall, James
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https://hdl.handle.net/2142/45423
Description
Title
A search for Z' bosons in the dimuon decay channel in 8 TeV proton-proton collisions
Author(s)
Coggeshall, James
Issue Date
2013-08-22T16:39:43Z
Director of Research (if dissertation) or Advisor (if thesis)
Liss, Tony M.
Doctoral Committee Chair(s)
Errede, Steven M.
Committee Member(s)
Liss, Tony M.
Cooper, S. Lance
El-Khadra, Aida X.
Department of Study
Physics
Discipline
Physics
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Date of Ingest
2013-08-22T16:39:43Z
Keyword(s)
Large Hadron Collider (LHC)
European Organization for Nuclear Research (CERN)
Argonne Tandem Linear Accelerator System (ATLAS)
Z'
dilepton resonances
muon resolution
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.
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