Squarks Below the Z
  We investigate the possibility that the difference between the measurements of $\alpha_3(M_Z)$ from the hadronic branching ratio of the $Z^0$ and the world average of other measurements is due to the decay of the $Z^0$ into quark, anti-squark, and gluino. Consequences for supersymmetry breaking models are discussed. 
L. Clavelli, P.W. Coulter, B. Fenyi, C. Hester, Peter Povinec, and   Kajia Yuan