Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2006-01-22
Physics
High Energy Physics
High Energy Physics - Phenomenology
6 pages, 2 figures, RevTeX. The paper was completely rewritten. The errors in the first version were eliminated. The compariso
Scientific paper
The many-parametric fit of the LEP2 data on e^+e^-\to e^+e^-, \mu^+\mu^-, \tau^+\tau^- processes is performed to estimate signals of the Abelian Z'-boson beyond the standard model. The model-independent relations between the Z' couplings to the standard model particles allow to describe the Z' effects in lepton processes by 4 independent parameters. No signal is found by the complete LEP2 data set, and the 1.3\sigma signal is detected by the fit of the backward bins. The Z' couplings to the vector and axial-vector lepton currents are constrained. The comparisons with the one-parameter fits and with the LEP1 experiments are performed.
Gulov A. V.
Skalozub Vladimir
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