Measuring the WWZ coupling at the Fermilab Tevatron

Hadroproduction of weak-boson pairs W^±Z and W⁺W^- is studied quantitatively at Fermilab Tevatron energies. Although the cross sections are expected to be small in the standard model, they grow substantially with nonstandard WWZ and WWγ couplings even after careful consideration of unitarity constraints. With 4.7 pb^-1 of data at hand, the Collider Detector at Fermilab Collaboration may already be sensitive to nonstandard WWZ couplings if |κZ-1|>1.3 or |λZ|>1.0 (90% C.L.) from Z(→l⁺l^-) plus dijet and W(→lν) plus dijet event rates or from leptonic decays of both weak bosons. With 100 pb^-1 of data, purely leptonic modes can be used to extend the sensitivity to |λZ|>0.4 (90% C.L.), which is comparable and complementary to the e⁺e^-→W⁺W^- experiments at the CERN collider LEP II.