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Measurement of the strong coupling alpha_S from the three-jet rate in e+e- - annihilation using JADE data

Research output: Contribution to journalJournal article

  • Jochen Schieck
  • Siegfried Bethke
  • Stefan Kluth
  • Christoph Pahl
  • Zoltan Trocsanyi
  • Alexander Finch
  • JADE Collaboration
Article number2332
<mark>Journal publication date</mark>03/2013
<mark>Journal</mark>The European Physical Journal C (EPJ C) - Particles and Fields
<mark>Original language</mark>English


We present a measurement of the strong coupling α S using the three-jet rate measured with the Durham algorithm in e+e− -annihilation using data of the JADE experiment at centre-of-mass energies between 14 and 44 GeV. Recent theoretical improvements provide predictions of the three-jet rate in e+e− -annihilation at next-to-next-to-leading order. In this paper a measurement of the three-jet rate is used to determine the strong coupling α S from a comparison to next-to-next-to-leading order predictions matched with next-to-leading logarithmic approximations and yields a value for the strong coupling consistent with the world average.