Power correction analyses in e+e− annihilation
نویسنده
چکیده
The current status of theoretical work and experimental analyses on power corrections in QCD for ee annihilation will be reviewed. Measurements of the number of active quark flavours nf and the QCD colour factors CA and CF derived from QCD fits to event shape distributions at lower energies and LEP energies will be presented. The fits are based on O(α2s)+NLLA QCD predictions with power corrections to model hadronisation.
منابع مشابه
Annihilation *
We give perturbative predictions for the distribution of the C-parameter event shape variable in e + e − annihilation, including resummation of large logarithms in the two-jet (small-C) region, matched to next-to-leading order results. We also estimate the leading non-perturbative power correction and make a preliminary comparison with experimental data.
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