Model independent search for Z'-boson signals

Understand

An approach to the model-independent searching for the Z' gauge boson as a virtual state in scattering processes is developed.

• It accounts for as a basic requirement the renormalizability of underlying unspecified in other respects model.
• This results in a set of relations between low energy couplings of Z' to fermions that reduces in an essential way the number of parameters to be fitted in experiments.
• On this ground the observables which uniquely pick out the Z' boson in leptonic processes are introduced and the data of LEP experiments analyzed.