Searches for Scalar Quarks in e^+e^- Interactions at \sqrt{s} = 189 GeV

Details Searches for Scalar Quarks in e^+e^- Interactions at \sqrt{s} = 189 GeV Searches for Scalar Quarks in e^+e^- Interactions at \sqrt{s} = 189 GeV

1999-10-11

arxiv.org/abs/hep-ex/9910020v1

Phys.Lett.B471:308-320,1999

Physics

High Energy Physics

High Energy Physics - Experiment

Scientific paper

10.1016/S0370-2693(99)01363-5

Searches for scalar top and scalar bottom quarks, as well as for mass-degenerate scalar quarks of the first two families are performed at 189 GeV centre-of-mass energy with the L3 detector at LEP. No signals are observed. Model-independent limits on the scalar top production cross sections are determined for the decay modes t1~ -> c chi_1^0 and t1~ -> b l nu~. For scalar quarks of the other flavours q~ -> q chi_1^0 decays are considered. Within the framework of the Minimal Supersymmetric Standard Model mass limits are set at 95% C.L. for these particles. Indirect limits on the gluino mass are also derived.

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