We present the results of a search for pair production of
scalar top quarks (t-bar_1) in an R-parity violating supersymmetric
scenario using 322 pb-1 of p anti-p collisions at s**(1/2) = 1.96 TeV
collected by the upgraded Collider Detector at Fermilab. We assume
each t-bar_1 decays into a tau lepton and a b quark with a branching
ratio beta, and that the final state contains either an electron or
a muon from a leptonic tau decay, a hadronically decaying tau lepton,
and two or more jets. Two candidate events pass our final selection
criteria, consistent with the expectation from standard model processes.
We present upper limits on the cross section times branching ratio squared
sigma(t-bar_1 t-bar_1) x beta2 as a function of the stop mass m(t-bar_1).
Assuming beta = 1, we set a 95% confidence level limit m(t-bar_1) > 153
GeV/c2 obtained using a next-to-leading order cross section. These limits
are also fully applicable to the case of a pair produced third generation
scalar leptoquark decaying into a tau lepton and a b quark.
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Updated: Tuesday, 2008 August 19 14:23:56 CDT automatically from input from carol picciolo