Perturbative QCD Description of Mean Jet and Particle Multiplicities in e+e- annihilation
Sergio Lupia, Wolfgang Ochs
Abstract
A complete numerical solution of the evolution equation for parton multiplicities in quark and gluon jets with initial conditions at threshold is presented. Data on both hadron and jet multiplicities in e+e- annihilation are well described with a common normalization, giving further support to the picture of Local Parton Hadron Duality. Predictions for LEP-II energies are presented. Furthermore we study the sensitivity to the cutoff parameter Q0 and the scale of alphas.
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