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Uniform TitleProbing mSUGRA with a search for chargino-neutralino production using trileptons
NameGlatzer, Julian (author), Somalwar, Sunil (chair), Thomas, Scott (co-chair), Lath, Amitabh (internal member), Rutgers University, Graduate School - New Brunswick,
Degree Date2008-10
Date Created2008
SubjectPhysics and Astronomy,
Supersymmetry,
Proton-antiproton colliders,
Leptons (Nuclear physics)
DescriptionThis thesis describes the CDF II 2fb-1 search for supersymmetric chargino-neutralino production in sqrt(s)=1.96 TeV p-pbar collisions using the "golden" channel with three leptons and missing transverse energy in the final state and the application of the results to obtain a limit on the parameter space of the supersymmetric model mSUGRA.
Electrons and muons are reconstructed directly; isolated tracks are used as a proxy for tau leptons. Several analysis channels with different signal purity are defined and evaluated independently. Based on 7 observed and 6.4 expected background events this analysis was able set the first direct limits on chargino-neutralino production in mSUGRA since LEP. Based on mSUGRA phenomenology the sensitivity of this analysis is investigated; the mSUGRA parameter space is split into different phenomenology classes.
Experimental results from previous searches in this channel by CDF and D0 have been presented for specific parameter values of a given model. A more model-independent approach is proposed and, by splitting the results of this analysis into channels based on tau content, the results of the analysis are generalized.
Electrons and muons are reconstructed directly; isolated tracks are used as a proxy for tau leptons. Several analysis channels with different signal purity are defined and evaluated independently. Based on 7 observed and 6.4 expected background events this analysis was able set the first direct limits on chargino-neutralino production in mSUGRA since LEP. Based on mSUGRA phenomenology the sensitivity of this analysis is investigated; the mSUGRA parameter space is split into different phenomenology classes.
Experimental results from previous searches in this channel by CDF and D0 have been presented for specific parameter values of a given model. A more model-independent approach is proposed and, by splitting the results of this analysis into channels based on tau content, the results of the analysis are generalized.
NoteM.S.
NoteIncludes bibliographical references (p. 117-121).
Genretheses
Persistent URLhttp://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.17479
LanguageEnglish
CollectionGraduate School - New Brunswick Electronic Theses and Dissertations
Organization NameRutgers, The State University of New Jersey
RightsThe author owns the copyright to this work.