UNITARITY CONSTRAINTS FOR NEW PHYSICS INDUCED BY DIM-6 OPERATORS

We compute the helicity amplitudes for boson-boson scattering at high energy due to the operators O-B Phi, O-W Phi, and O-UB, and we derive the corresponding unitarity bounds. Thus, we provide relations between the couplings of these operators and the corresponding New Physics th resholds, where either unitarity is saturated or new degrees of freedo m are excited. We compare the results with those previously obtained f or the operators O-W and O-UW and we discuss their implications for di rect and indirect tests at present and future colliders. The present t reatment completes the study of the unitarity constraints for all blin d bosonic operators.