Angular Analysis of the Muon Pair Asymmetry at LEP 1

Details Angular Analysis of the Muon Pair Asymmetry at LEP 1 Angular Analysis of the Muon Pair Asymmetry at LEP 1

2001-07-19

arxiv.org/abs/hep-ex/0107046v1

Phys.Lett.B516:1-20,2001

Physics

High Energy Physics

High Energy Physics - Experiment

31 pages, 8 figures, Accepted by Physics Letters B

Scientific paper

10.1016/S0370-2693(01)00896-6

Data on muon pair production obtained by the OPAL collaboration at centre of mass energies near the Z peak are analysed. Small angular mismatches between the directions of the two muons are used to assess the effects of initial state photon radiation and initial-final-state radiation interference on the forward-backward asymmetry of muon pairs. The dependence of the asymmetry on the invariant mass of the pair is measured in a model-independent way. Effective vector and axial-vector couplings of the Z boson are determined and compared to the Standard Model expectations.

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