Tests of the standard model and constraints on new physics from measurements of fermion-pair production at 183 GeV at LEP

The OPAL Collaboration

Research output: Contribution to journalArticlepeer-review

81 Scopus citations

Abstract

Cross-sections for hadronic, bb̄ and lepton pair final states in e+e- collisions at √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 √s=130 and 136 GeV. The results are used to measure the energy dependence of the electromagnetic coupling constant αem, 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.

Original languageEnglish
Pages (from-to)1-18
Number of pages18
JournalEuropean Physical Journal C
Volume6
Issue number1
DOIs
StatePublished - 1 Jan 1999
Externally publishedYes

ASJC Scopus subject areas

  • Engineering (miscellaneous)
  • Physics and Astronomy (miscellaneous)

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