Search for the supersymmetric partner of the top quark in pp̅ collisions at √s=1.8 TeV

Authors

• T. Affolder, Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, California
• Kenneth A. Bloom, University of Nebraska-LincolnFollow
• Collider Detector at Fermilab Collaboration

Document Type

Article

Date of this Version

5-1-2001

Comments

Published by American Physical Society. Phys. Rev. D 63, 091101 (2001). http://prd.aps.org. Copyright © 2001 American Physical Society. Permission to use.

Abstract

We report on a search for the supersymmetric partner of the top quark (top squark) produced in tt̅ events using 110 pb^-1 of pp̅ collisions at √s =1.8 TeV recorded with the Collider Detector at Fermilab. In the case of a light top squark, the decay of the top quark into a top squark plus the lightest supersymmetric particle (LSP) could have a significant branching ratio. The observed events are consistent with standard model tt̅ production and decay. Hence, we set limits on the branching ratio of the top quark decaying into a top squark plus LSP, excluding branching ratios above 45% for a LSP mass up to 40 GeV/c².