Seiberg duality and e(+)e(-) experiments - art. no. 105008

Seiberg duality in supersymmetric gauge theories is the claim that two diff erent theories describe the same physics in the infrared limit. However, on e cannot easily work out physical quantities in strongly coupled theories a nd hence it has been difficult to compare the physics of the electric and m agnetic theories. In order to gain more insight into the equivalence of two theories, we study the "e(+)e(-)" cross sections into "hadrons" for both t heories in the superconformal window. We describe a technique which allows us to compute the cross sections exactly in the infrared limit. They are in deed equal in the low-energy limit and the equality is guaranteed because o f the anomaly matching condition. The ultraviolet behavior of the total ''e (+)e(-)" cross section is different for the two theories. We comment on pro posed non-supersymmetric dualities. We also analyze the agreement of the "g amma gamma'' and ''WW'' scattering amplitudes in both theories, and in part icular try to understand if their equivalence can be explained by the anoma ly matching condition. [S0556-2821(99)02310-3].