### Abstract

Differential three-jet cross sections have been measured in e^{+}e^{-}-annihilation at an average CM energy of 33.8 GeV and were compared to first- and second-order predictions of QCD and of a QED-like abelian vector theory. QCD provides a good description of the observed distributions. The inclusion of second-order effects reduced the observed quark-gluon coupling strength by about 20% to α_{S} = 0.16 ± 0.015 (stat.) ± 0.03 (syst.). The abelian vector theory is found to be incompatible with the data.

Original language | English |
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Pages (from-to) | 239-244 |

Number of pages | 6 |

Journal | Physics Letters B |

Volume | 119 |

Issue number | 1-3 |

DOIs | |

Publication status | Published - 1982 Dec 16 |

### ASJC Scopus subject areas

- Nuclear and High Energy Physics

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## Cite this

^{+}e

^{-}-annihilation and comparison with second-order predictions of QCD and abelian vector theory.

*Physics Letters B*,

*119*(1-3), 239-244. https://doi.org/10.1016/0370-2693(82)90285-4