LOW-ENERGY EFFECTIVE LAGRANGIAN OF THE BESS MODEL

In this paper the low-energy limit of the BESS model is studied in a s ystematic way. The method consists in eliminating the heavy vector fie ld, by use of its classical equations of motion, in the infinite mass limit. After the elimination of the heavy degrees of freedom we get ad ditional terms to the Standard Model Lagrangian. After a finite renorm alization of the ordinary gauge bosons wave functions, and redefinitio n of the Lagrangian couplings in terms of M(Z), the fine structure con stant and the Fermi constant, we can read directly the deviations from the Standard Model. By this procedure we can extend a result previous ly derived to the case in which the heavy vector bosons have a direct coupling to fermions. Consequences for the anomalous trilinear couplin gs are discussed.