Fitting of Z' parameters

Abstract

The paper deals with an approach to the model-independent searching for the Z' gauge boson as a virtual state in scattering processes. The relations between the Z' couplings to fermions covering a wide class of models beyond the standard model are found and used. They reduce in an essential way the number of parameters to be fitted in experiments. Special observables which uniquely pick out the Z' at energies of LEP and ILC colliders in different leptonic processes are introduced and the data of LEP experiments are analyzed. The Z' couplings to leptons and quarks are estimated at 95% confidence level. At this level, the LEP data are compatible with the existence of the Z' with the mass of order 1-1.2 TeV. These estimates may serve as a guide for experiments at the Tevatron and/or LHC. A comparison with other approaches and results is given.

29 pages, 9 figures, 6 tables

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Cited by in corpus (5)

• Precise determination of Z-Z' mixing at the CERN LHC
• Model-independent estimates for the Abelian Z' boson at modern hadron colliders
• Estimates for the Abelian $Z^{\prime }$ Couplings from the LHC Data
• Optimal one-parameter observables for $Z^{\prime }$ searches in $e^{+}{e}^{-}\to {\mu }^{+}{\mu }^{-}$ process
• Estimates of Z'couplings within data on the A_{FB} for Drell-Yan process at the LHC at s^(1/2) = 7 TeV and 8 TeV