Search for first-generation leptoquarks in p̄p collisions at s=1.8 TeV
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We present results of a search for a first-generation leptoquark S1 in p̄p collisions at s=1.8 TeV at the Fermilab Tevatron. Using 4.05 pb-1 of data collected during the 1988-1989 CDF run, we have searched for evidence of S1S̄1 production assuming that each leptoquark decays to an electron+quark pair with a branching ratio β. Three events with two high energy electrons and two high energy jets were found, but are consistent with Z0 decay. No events were found in the signal region. Assuming a short lived scalar leptoquark with Yukawa coupling strength λ2×10-7, we exclude σβ2> 55(4.0) pb at 95% C.L. for MS=45(125) GeV/c2. Using a Monte Carlo prediction for σ(p̄p→S1S̄1+X), we exclude MS<113(80) GeV/c2 for β=100(50)%. © 1993 The American Physical Society.
author list (cited authors)
Abe, F., Albrow, M., Amidei, D., Anway-Wiese, C., Apollinari, G., Atac, M., ... Gauthier, A.