Search for pair production of scalar top quarks decaying to aτ lepton and a b quark in 1.96 TeV p$\bar{p}$ collisions

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I present the results of a search for pair production of scalar top quarks ($\tilde{t}$1) in an R-parity violating supersymmetric scenario using 322 pb-1 of p{bar p} collisions at √s = 1.96 TeV collected by the upgraded Collider Detector at Fermilab. I assume each $\tilde{t}$1 decays into a {tau} lepton and a b quark, with branching ratio {beta}, and search for final states containing either an electron or a muon from a leptonic τ decay, a hadronically decaying τ lepton, and two or more jets. Two candidate events pass my final selection criteria, consistent with the expectation from standard model processes. I present upper limits on the cross section times branching ratio squared σ($\tilde{t}$1$\tilde{t}$1) x β2 as a function of the stop mass m($\tilde{t}$1). Assuming β = 1, I set a 95% confidence level limit m($\tilde{t}$1) > 153 GeV=c2. These limits are also fully applicable to the case of a pair produced third generation scalar leptoquark that decays into a τ lepton and a b quark.

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