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We calculate, using a Z-peak subtracted representation of four-fermionprocesses previously illustrated for the case of electron-positron annihilationinto charged lepton-antilepton, the corresponding expressions of the newphysics contributions for the case of final quark-antiquark states, allowingthe possibility of both universal and non universal effects. We show that, ineach case, the main result obtained for the final lepton channel can begeneralized, so that every experimentally measurable quantity can be expressedin terms of input parameters \underline{measured} on Z resonance, of$\alpha(0)$ and of a small number of subtracted one loop expressions. Someexamples of models are considered for several c.m. energy values, showing thatremarkable simplifications are often introduced by our approach. In particular,for the case of a dimension-six lagrangian with anomalous gauge couplings, thesame reduced number of parameters that would affect the observables of finalleptonic states are essentially retained when one moves to final hadronicstates. This leads to great simplifications in the elaboration of constraintsand, as a gratifying byproduct, to the possibility of making the signal fromthese models clearly distinguishable from those from other (both universal andnon universal) competitors.Comment: 21 pages + 3 figures in ps file, corrected version. (e-mail  renard@lpmsun2.lpm.univ-montp2.fr

Universal and nonuniversal new physics effects in a general four-fermion process: AZ-peak subtracted approach