Abstract.
Cross-sections for hadronic, \(\rm b\bar{b}\) and lepton pair final states in \(\rm e^+e^-\) collisions at \(\sqrt{s}\)=183 GeV, measured with the OPAL detector at LEP, are presented and compared with the predictions of the Standard Model. Forward-backward asymmetries for the leptonic final states have also been measured. Cross-sections and asymmetries are also presented for data recorded in 1997 at \(\sqrt{s}\)=130 and 136 GeV. The results are used to measure the energy dependence of the electromagnetic coupling constant \(\alpha_{\rm em}\), and to place limits on new physics as described by four-fermion contact interactions or by the exchange of a new heavy particle such as a leptoquark, or of a squark or sneutrino in supersymmetric theories with R-parity violation.
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Received: 3 July 1998 / Published online: 15 October 1998
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The OPAL Collaboration., Abbiendi et al., G. Tests of the Standard Model and constraints on new physics from measurements of fermion-pair production at 183 GeV at LEP. Eur. Phys. J. C 6, 1–18 (1999). https://doi.org/10.1007/s100529801027
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DOI: https://doi.org/10.1007/s100529801027