PATTERNS OF DEVIATION FROM THE STANDARD MODEL

Effective lagrangians can be used to parametrize the effects of physic s beyond the Standard Model. Assuming the complete theory is a gauge t heory, we determine which effective operators may be generated at tree level, and which are only generated at loop level. The latter are sup pressed by factors of 1/16 pi(2) and will therefore be quite difficult to detect. In particular, all operators changing the Standard-Model s tructure of the triple-gauge-vector couplings fall into this category. We also point out that in certain cases, dimension-eight operators ma y be more important than dimension-six operators. We discuss both the linear and non-linear representation of the Higgs sector.