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A simultaneous measurement of the QCD colour factors and the strong coupling

  • G. Abbiendi et al.
  • The OPAL Collaboration
Experimental physics

Abstract.

Using data from \(e^+e^-\) annihilation into hadrons, taken with the OPAL detector at LEP at the Z pole between 1991 and 1995, we performed a simultaneous measurement of the colour factors of the underlying gauge group of the strong interaction, \(C_F\) and \(C_A\), and the strong coupling, \(\alpha_s\). The measurement was carried out by fitting next-to-leading order perturbative predictions to measured angular correlations of 4-jet events together with multi-jet related variables. Our results,

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provide a test of perturbative QCD in which the only assumptions are non-abelian gauge symmetry and standard hadronization models. The measurements are in agreement with SU(3) expectations for \(C_F\) and \(C_A\) and the world average of \(\alpha_s(M_{Z})\).

Keywords

Gauge Group Strong Coupling Gauge Symmetry Opal Detector Simultaneous Measurement 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg / Società Italiana di Fisica 2001

Authors and Affiliations

  • G. Abbiendi et al.
    • 1
  • The OPAL Collaboration
  1. 1.Dipartimento di Fisica dell' Università di Bologna and INFN, 40126 Bologna, Italy IT

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