We point out that the production cross section of ppVV, with V=W,Z and V=W,Z is a useful diagnostic of V gauge couplings at future hadron colliders. For MZ1 TeV it would allow determination of combinations of Z gauge couplings to the quarks to around 10%. An analysis of the extraction of gauge couplings from the complementary testsforward-backward asymmetry, rare decays ppVf1f»2V, and the production cross section ppVVis given in a model-independent framework. Four ratios of charges are needed to characterize a general gauge theory with an additional family-independent U(1) factor. We show that there are four functions of these ratios observable at hadron colliders, but for projected Superconducting Super Collider and Large Hadron Collider luminosities only two combinations can be extracted. These yield a significant discrimination between interesting grand-unified-theory-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.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)