Renormalizability and the model independent observables for the Abelian Z′ search -: art. no. 055007

The observables that are useful for the model independent search for signals of the Abelian Z' in the processes e(+)e(-) --> (f) over bar f are introduced. They are based on the renormalization group relations between the Z' couplings to the standard model particles developed recently and extend the variables suggested by Osland, Pankov, and Paver. The bounds on the values of the observables at the center-of-mass energy root s = 500 GeV are derived.