Ph.D. (Doctor of Philosophy)
Department of Physics
Particles (Nuclear physics)||Quarks||Leptons (Nuclear physics)
Leptoquarks (LQ) are particles with both color and lepton number predicted in some gauge theories and composite models. Current theory suggests that leptoquarks would come in three different generations. We report on a search for charge 1/3 third generation leptoquarks produced in pp̅ collisions at [squareroot s]=1.96 TeV using data collected by the D0 detector at Fermilab. Such leptoquarks would decay into a tau-neutrino plus a b-quark with branching fraction B. We present preliminary results on an analysis where both leptoquarks decay into neutrinos giving a final state with missing energy and two b-jets. Using 425(recorded) pb⁻¹ of data, we place limits on a(pp̅ —> LQL̅Q̅)B² as a function of the leptoquark mass. Assuming B = 1, we excluded at the 95% confidence level scalar third generation leptoquarks with M[sub LQ]lq < 219 GeV.
Zatserklyaniy, Andriy, "A search for third generation scalar leptoquarks" (2006). Graduate Research Theses & Dissertations. 549.
xi, 105 pages (some color pages)
Northern Illinois University
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