Searches for scalar top and scalar bottom quarks in e+e− interactions at 161 GeV 183 GeV

M. Acciarri, O. Adriani, M. Aguilar-Benitez, S. Ahlen, J. Alcaraz, G. Alemanni, J. Allaby, A. Aloisio, M.G. Alviggi, G. Ambrosi, H. Anderhub, V.P. Andreev (+413 others)
1999 Physics Letters B  
Searches for scalar top and scalar bottom quarks have been performed at center-of-mass energies between 161 GeV and 183 GeV using the L3 detector at LEP. No signal is observed. Model-independent limits on production cross sections are determined for the two decay channels tj ™ cx' 0' and bi ™ by01. Within the framework of the Minimal Supersymmetric extension of the Standard Model mass limits are derived. For mass differences between tj and x' 0' greater than 10 GeV a 95% C.L. limit of 81.5 GeV
more » ... s set on the mass of the Supersymmetric partner of the left-handed top. A supersymmetric partner of the left-handed bottom with a mass below 80 GeV is excluded at 95% C.L. if the mass difference between b1 and X0 is greater than 20 GeV.
doi:10.1016/s0370-2693(98)01505-6 fatcat:ipfg7awzsbbxdh3ym5evq7sacq