Search for pair production of supersymmetric top quarks in dilepton events at the tevatron
by Johnson, William, Ph.D., UNIVERSITY OF CALIFORNIA, DAVIS, 2010, 153 pages; 3422638

Abstract:

We search for pair production of the supersymmetric partner of the top quark, the stop quark t˜1, decaying to a b-quark and a chargino [special characters omitted] with a subsequent [special characters omitted] decay into a neutralino [special characters omitted], lepton ℓ, and neutrino ν. Using 2.7 fb-1 of [special characters omitted] = 1.96 TeV pp¯ collision data collected by the CDF II experiment, we reconstruct the mass of candidate stop events and fit the observed mass spectrum to a combination of standard model processes and stop signal. No evidence of t˜1 t¯˜1 production is found, therefore we set 95% C.L. limits on the masses of the stop and the neutralino for several values of the chargino mass and the branching ratio [special characters omitted].
 
AdviserRobin D. Erbacher
SchoolUNIVERSITY OF CALIFORNIA, DAVIS
SourceDAI/B 71-10, p. , Oct 2010
Source TypeDissertation
SubjectsParticle physics
Publication Number3422638
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