Search for scalar top quark production in p&pmacr; collisions at sqrt |
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Authors: | Tkaczyk Tollefson Tollestrup Toyoda Trischuk de Troconiz JF Tseng Turini Ukegawa Valls Vejcik Velev Vidal Vilar Volobouev Vucinic Wagner Wagner Wahl Wallace Walsh Wang Wang Wang Watanabe Waters |
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Affiliation: | Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA. |
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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 sqrts] = 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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