HIGHER-ORDER TOP SQUARK DECAYS

Within the minimal supersymmetric standard model we study the three bo dy decay of the lighter top squark <(t)over tilde (1)> --> <bW(chi)ove r tilde (0)(1)> and compare this decay with the flavor-changing two bo dy decay <(t)over tilde (1)> --> <c(chi)over tilde (0)(1)>. Here <(chi )over tilde (0)(1)> is the lightest neutralino which we assume to be t he lightest supersymmetric particle. We do this for scenarios where tw o body decays at the tree level are forbidden for the light top squark . We give the complete analysis for the three body decay and compare i t with the mentioned two body decay. We discuss our numerical results in view of the upgraded Fermilab Tevatron, the CERN LHC, and a 500 GeV e(+)e(-) Linear Collider.