An Evolution Condition for Electroweak Interactions in Composite Models

We impose the requirement of good high energy behavior on j j + W+Wscattering amplitudes for effective theory of electroweak interactions in composite models. We find that there exists a set of constraints on the form factors which we call the “evolution condition” any such theory should obey. According to this condition the electromagnetic and weak interactions are “unified” in a less stringent way than the so-called “unification condition.” In addition, the effective theory should have a welldefined evolution governed by the constraints on the form factors. We have checked this condition on several 7 W mixing schemes. Possible experimental tests are discussed. -. Submitted to Physical Review D *Work supported in part by the Department of Energy, contract DE-AC03-76SF00515, and by Centre National de la Recherche Scientifique, France. t Present address: Department of Physics, UCLA, Los Angeles, CA 90024.