We present the results of a search for pair production of the supersymmetric partner of the top quark (the top squark t̃1) decaying to a b quark and a chargino χ̃1± with a subsequent χ̃1± decay into a neutralino χ̃10, lepton ℓ, and neutrino ν. Using a data sample corresponding to 2.7fb-1 of integrated luminosity of pp̄ collisions at √s=1.96TeV collected by the CDF II detector, we reconstruct the mass of top squark candidate events and fit the observed mass spectrum to a combination of standard model processes and t̃1t̃̄1 signal. We find no evidence for t̃1t̃̄1 production and set 95% C.L. limits on the masses of the top squark and the neutralino for several values of the chargino mass and the branching ratio B(χ̃1±→χ̃10ℓ±ν). © 2010 The American Physical Society.

Search for pair production of supersymmetric top quarks in dilepton events from pp̄ collisions at √s=1.96TeV

Sforza F.;
2010-01-01

Abstract

We present the results of a search for pair production of the supersymmetric partner of the top quark (the top squark t̃1) decaying to a b quark and a chargino χ̃1± with a subsequent χ̃1± decay into a neutralino χ̃10, lepton ℓ, and neutrino ν. Using a data sample corresponding to 2.7fb-1 of integrated luminosity of pp̄ collisions at √s=1.96TeV collected by the CDF II detector, we reconstruct the mass of top squark candidate events and fit the observed mass spectrum to a combination of standard model processes and t̃1t̃̄1 signal. We find no evidence for t̃1t̃̄1 production and set 95% C.L. limits on the masses of the top squark and the neutralino for several values of the chargino mass and the branching ratio B(χ̃1±→χ̃10ℓ±ν). © 2010 The American Physical Society.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11567/964026
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