Comparison of ALEPH data and model predictions for the angle between the two lowest energetic jets in four-jet events (Durham algorithm, E-scheme, ycut=0.008). The data are in good agreement with the QCD prediction which has SU(3) as underlying gauge group, whereas an abelian model fails to describe the data. The data are corrected to parton level using the PYTHIA Monte Carlo model. The errors are statistical only. For a description of the event selection and the construction of the observable see

Simultaneous Measurement of the Strong Coupling Constant and the QCD Colour Factors from 4-jet hadronic Z decays

Final (ps) (abstract)

ALEPH Collaboration

possible contact person(s) : S. Bravo

Refs: QCD hadronisation

ALEPH 2001-042 CONF (CONFerence) 2001-026

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