Search for electroweak single top quark production in 1.96-TeV proton-antiproton collisions Page: 2 of 143
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Search for Electroweak Single Top Quark Production
in 1.96 TeV Proton-Antiproton Collisions
Doctor of Philosophy
Graduate Department of Physics
University of Toronto
This thesis describes the first search for electroweak single top quark production in
proton-antiproton collisions at a center of mass energy of 1.96 TeV. The data sample
used for this analysis corresponds to 162 pb-' recorded by the upgraded Collider Detec-
tor at Fermilab. The search is performed by doing a classic maximum likelihood fit to
the HT distribution in data. The kinematic variable HT is the scalar sum of transverse
energies of all final state particles in the event. This variable has the advantage that its
distribution looks very similar for both contributing (s-channel and t-channel) single top
processes, but is different for background processes. The combination of both channels to
one signal improves the sensitivity of the search. No significant evidence for electroweak
single top quark production is found and we set an upper limit at the 95% confidence
level on the combined single top quark production cross section of 17.8 pb.
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Stelzer, Bernd & U., /Toronto. Search for electroweak single top quark production in 1.96-TeV proton-antiproton collisions, thesis or dissertation, January 1, 2005; Batavia, Illinois. (digital.library.unt.edu/ark:/67531/metadc882820/m1/2/: accessed December 13, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.