Abstract
The phenomenological manifestation of the additionalY(YL) boson arising in the models with the composite structure of electroweak interactions is studied for the process\(e^ + e^ - \to f\bar f\) at the TRISTAN and LEP energies.
It is shown that the presence of the additional isoscalar boson, which can provide the explanation of the experimentally observed deviation ofR μ value from the Standard Model predictions at TRISTAN, yields a measurable effect in the cross-section of e+e- → μ+μ- (hadrons) processes at LEP. This effect in the muon and hadron cross-sections at the energies Mz±Гz/2 can be ∼1.5–2.0% for small values of the γ-Y mixing parameter.
The increase of statistics for the above processes at TRISTAN and LEP will permit to set an additional limitation on the model parameters.
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On leave of absence from Gomel Politechnical Institute, Gomel, 246746, USSR
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Gershtein, S.S., Likhoded, A.A., Pankov, A.A. et al. Effects of additional isoscalar vector bosons in\(e^ + e^ - \to f\bar f\) processes at the TRISTAN and LEP energies. Z. Phys. C - Particles and Fields 56, 279–284 (1992). https://doi.org/10.1007/BF01555525
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DOI: https://doi.org/10.1007/BF01555525