Power correction analyses in e+e- annihilation
Stefan Kluth
TL;DR
This paper reviews theoretical and experimental work on power corrections in QCD for e+e- annihilation, including measurements of quark flavors and color factors from event shape data at various energies.
Contribution
It presents new measurements of quark flavors and color factors derived from QCD fits incorporating power corrections to hadronisation models.
Findings
Measurements of n_f, C_A, and C_F from event shape distributions.
Fits based on O(alpha_s^2)+NLLA QCD predictions with power corrections.
Analysis covers data from lower energies and LEP energies.
Abstract
The current status of theoretical work and experimental analyses on power corrections in QCD for e+e- annihilation will be reviewed. Measurements of the number of active quark flavours n_f and the QCD colour factors C_A and C_F derived from QCD fits to event shape distributions at lower energies and LEP energies will be presented. The fits are based on O(alpha_s^2)+NLLA QCD predictions with power corrections to model hadronisation.
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