Search for 3rd Generation Vector Leptoquarks in the Di-tau Di-jet Channel in Proton Antiproton Collisions at square √s = 1.96 TeV

Abstract

We search for third generation vector leptoquarks (V LQ3) produced in colliding p$\bar{p}$ beams operating at √s = 1.96 TeV at the CDF experiment in Run II of the Fermilab Tevatron. We use 322 pb-1 of data to search for the V LQ3 signal in the di-tau plus di-jet channel. For the first time, the full matrix element is used in the Monte Carlo simulation of this signal. With no events observed in the signal region, we set a 95% C.L. upper limit on the V LQ3 pair production cross section of σ 317 GeV=c2. If theoretical uncertainties on the cross section are applied in the least favorable manner the results are σ 294 GeV=c2. The Minimal coupling V LQ3 result is an upper limit on the cross section of σ 251 GeV=c2 (mV LQ3 > 223 GeV=c2) for the nominal (1σ varied) theoretical expectation.

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