V'Z and V'W Production as Tests of Heavy Gauge Boson Couplings at Future Hadron Colliders

الأصل · EN

We point out that the production cross section of pp→ V'V, with V'=W',Z' and V=W,Z is a useful diagnostic of V' gauge couplings at future hadron colliders. For MZ'≃1 TeV it would allow determination of combinations of Z' gauge couplings to the quarks to around 10 percent. An analysis of the extraction of gauge couplings from the complementary tests: forward-backward asymmetry, rare decays pp→ V'→ f₁ f₂V, and the production cross section pp→ V'V is given in a model-independent framework. Four ratios of charges are needed to characterize a general gauge theory with an additional family-independent U₁' factor. We show that there are four functions of these ratios observable at hadron colliders, but for projected SSC and LHC luminosities only two combinations can be extracted. These yield a significant discrimination between interesting GUT-motivated models. Clean tests of whether a new W' couples to right-handed currents, of the ratio gᵣ/gₗ of gauge couplings, and of the non-abelian vertex in left-right symmetric models are described.