Measurement of the relative fraction of ttbar events produced via gluon fusion in ppbar collision at s**(1/2) = 1.96 TeV at CDF Page: 3 of 114
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ABSTRACT OF THE DISSERTATION
Measurement of the relative fraction of tt events produced
via gluon-fusion in pp collision at V/s = 1.96 TeV at CDF
by Jared Yamaoka
Dissertation Director: Professor Sunil Somalwar
In this thesis we present a measurement of the relative fraction of tt events pro-
duced via gluon-fusion to the total number of tt events. Using the kinematics of the
production and decay of the top and antitop quark pair, we trained a Neural Network
to discriminate the gluon-fusion events. The Neural Network was then used as a tem-
plate to fit for the gluon-fusion fraction in data. Using a total integrated luminosity of
955 pb-1 we find r(gg- tf) < 0.33 at 68% confidence level and _(gg-tf) < 0.61 at 95%
confidence level.ii
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Yamaoka, Jared Andrew. Measurement of the relative fraction of ttbar events produced via gluon fusion in ppbar collision at s**(1/2) = 1.96 TeV at CDF, thesis or dissertation, October 1, 2007; Batavia, Illinois. (https://digital.library.unt.edu/ark:/67531/metadc889884/m1/3/: accessed April 25, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.