Uniform TitleMeasurement of the relative fraction of ttbar events produced via gluon-fusion in ppbar collision at √s = 1.96 TeV at CDF.
NameYamaoka, Jared (author), Somalwar, Sunil (chair), Lovelace, Claud (internal member), Thomson, Gordon (internal member), Matilsky, Terry (internal member), Thomson, Evelyn (outside member), Rutgers University, Graduate School - New Brunswick,
SubjectPhysics and Astronomy,
Particles (Nuclear physics),
DescriptionIn this thesis we present a measurement of the relative fraction of ttbar events produced via gluon-fusion to the total number of ttbar 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 template to fit for the gluon-fusion
fraction in data. Using a total integrated luminosity of 955 pb-1 we find the fraction of gluon-fusion event in all ttbar events to be &amp;lt;0.33 at the 68% confidence level and &amp;lt;0.61 at the 95% confidence level.
NoteIncludes bibliographical references (p. 96-100).
CollectionGraduate School - New Brunswick Electronic Theses and Dissertations
Organization NameRutgers, The State University of New Jersey
RightsThe author owns the copyright to this work.