Searches for scalar quarks in e+e- interactions at √s =189 GeV

• Autores: Dova, María Teresa; L3 Collaboration
• Año de publicación: 1999
• Idioma: inglés
• Tipo de recurso: artículo
• Materia: Ciencias Exactas; Física; scalar quarks; L3 detector; minimal supersymmetric standar model
• Institución: Universidad Nacional de La Plata

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 $\text{t}\text{̃}{}_1\text{→}\text{c}\text{χ}\text{̃}{}_1{}^0$ and $\text{t}\text{̃}{}_1\text{→}\text{b}\text{ℓ}\text{ν}\text{̃}$. For scalar quarks of the other flavours $\text{q}\text{̃}\text{→}\text{q}\text{χ}\text{̃}{}_1{}^0$ 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.
Facultad de Ciencias Exactas