ONE-LOOP CALCULATION OF THE EPSILON(3) PARAMETER WITHIN THE EXTENDED BESS MODEL

The existence of a strongly interacting sector responsible for the ele ctroweak symmetry breaking is assumed. As a consequence vector and axi al-vector bound states may be formed. These resonances mix with the St andard Model gauge bosons and are of primary phenomenological importan ce for the LEP physics. The extended BESS model is an effective scheme based on the symmetry group SU(8)L x SU(8)R, describing in a consiste nt way the interactions among the pseudo-Goldstone bosons, vector and axial-vector resonances and the standard gauge bosons. In a previous p aper, the contribution from extended BESS to the electroweak oblique c orrections was evaluated. However, only an estimate of the effects com ing from mass and wave function renormalization of the new resonances, was given. Here we complete the evaluation by computing explicitly th ese effects. We confirm the previous result, that is, in spite of the great precision of the present LEP measurements, the extended BESS par ameter space is not very much constrained.