Home > Research > Publications & Outputs > Determination of alpha(S) using jet rates at LE...

Associated organisational unit

View graph of relations

Determination of alpha(S) using jet rates at LEP with the OPAL detector

Research output: Contribution to Journal/MagazineJournal articlepeer-review

Published
  • G. Abbiendi
  • C. Ainsley
  • P. F. Akesson
  • G. Alexander
  • G. Anagnostou
  • K. J. Anderson
  • S. Asai
  • D. Axen
  • I. Bailey
  • E. Barberio
  • T. Barillari
  • R. J. Barlow
  • R. J. Batley
  • P. Bechtle
  • T. Behnke
  • K. W. Bell
  • P. J. Bell
  • G. Bella
  • A. Bellerive
  • G. Benelli
  • S. Bethke
  • O. Biebel
  • O. Boeriu
  • P. Bock
  • M. Boutemeur
  • S. Braibant
  • R. M. Brown
  • H. J. Burckhart
  • S. Campana
  • P. Capiluppi
  • R. K. Carnegie
  • A. A. Carter
  • J. R. Carter
  • C. Y. Chang
  • D. G. Charlton
  • C. Ciocca
  • A. Csilling
  • M. Cuffiani
  • S. Dado
  • A. De Roeck
  • E. A. De Wolf
  • K. Desch
  • B. Dienes
  • M. Donkers
  • J. Dubbert
  • E. Duchovni
  • G. Duckeck
  • T. P. Duerdoth
  • E. Etzion
  • F. Fabbri
  • OPAL Collaboration
Close
<mark>Journal publication date</mark>03/2006
<mark>Journal</mark>European Physical Journal C: Particles and Fields
Issue number3
Volume45
Number of pages22
Pages (from-to)547-568
Publication StatusPublished
<mark>Original language</mark>English

Abstract

Hadronic events produced in e(+)e(-) collisions by the LEP collider and recorded by the OPAL detector were used to form distributions based on the number of reconstructed jets. The data were collected between 1995 and 2000 and correspond to energies of 91 GeV, 130-136 GeV and 161-209 GeV. The jet rates were determined using four different jet-finding algorithms (Cone, JADE, Durham and Cambridge). The differential two-jet rate and the average jet rate with the Durham and Cambridge algorithms were used to measure alpha(S) in the LEP energy range by fitting an expression in which O(alpha(2)(S)) calculations were matched to a NLLA prediction and fitted to the data. Combining the measurements at different centre-of-mass energies, the value of alpha(s)(Mz) was determined to be as(Mz) = 0.1177 +/- 0.0006 (stat.) +/- 0.0012 (expt.) +/- 0.0010 (had.) +/- 0.0032 (theo.)