Squarks and gluinos at a TeV e+e− collider: Testing the identity of Yukawa and gauge couplings in SUSY-QCD

This identity is preserved if supersymmetry is broken by soft terms, i.e. gaugino/scalar masses, and bi/tri-linear couplings between scalar fields. The relation is crucial for the natural extension of the theory from the electroweak scale to the Planck-scale without introducing quadratic divergences, which are generated in the squark propagator, for instance, by the bosonic squark/gluon loops and which are canceled by the fermionic quark/gluino loop.