Research Papers in Physics and Astronomy


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Published by American Physical Society. Phys. Rev. Lett. 84, 5273 (2000). Copyright © 2000 American Physical Society. Permission to use.


We have searched for direct production of scalar top quarks at the Collider Detector at Fermilab in 88 pb-1 of pp collisions at √s =1.8 TeV. We assume the scalar top quark decays into either a bottom quark and a chargino or a bottom quark, a lepton, and a scalar neutrino. The event signature for both decay scenarios is a lepton, missing transverse energy, and at least two b-quark jets. For a chargino mass of 90 GeV/c2 and scalar neutrino masses of at least 40 GeV/c2, we find no evidence for scalar top production and present upper limits on the production cross section in both decay scenarios.

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