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Updated: Aug 3, 2026

Setting Limits on Supersymmetry Using Simplified Models
Published on: November 15, 2013
Search for scalar top quark production in p&pmacr; collisions at sqrt
Tkaczyk1, Tollefson, Tollestrup
1Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
Abstract:
We have searched for direct production of scalar top quarks at the Collider Detector at Fermilab in 88 pb(-1) of p&pmacr; collisions at sqrt[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/c(2) and scalar neutrino masses of at least 40 GeV/c(2), 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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