Abstract
The differential cross sections for Bhabha scattering and μ pair production, and the total τ pair cross section as measured by the PLUTO detector at PETRA, have been analyzed to extract information on the weak interaction of leptons. The data are compared with unified gauge theories. Since the observed electroweak effects are still consistent with zero (within errors) we can set experimental limits on neutral current parameters atQ 2 values of 950 GeV2. In the framework of the standard SU(2)×U(1) model we find sin2 Θ w <0.52(95% c.l.). In the context of general singleZ o models we can excludeZ o masses of less than 40 GeV.
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Supported by the BMFT, FRG
Partially supported by the Norwegian Council for Science and Humanities
partially supported by INFN
Partially supported by Department of Energy, USA
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Pluto Collaboration., Berger, C., Genzel, H. et al. Experimental test of electroweak effects at PETRA energies. Z. Phys. C - Particles and Fields 7, 289–293 (1981). https://doi.org/10.1007/BF01431561
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DOI: https://doi.org/10.1007/BF01431561