S. Lupia et W. Ochs, PERTURBATIVE QCD DESCRIPTION OF MEAN JET AND PARTICLE MULTIPLICITIES IN E(-) ANNIHILATION()E(), Nuclear physics. B, Proceedings supplement, 71, 1999, pp. 152-157
A complete numerical solution of the evolution equation for parton mul
tiplicities in quark and gluon jets with initial conditions at thresho
ld 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. Predict
ions for LEP-II energies are presented. Furthermore we study the sensi
tivity to the cutoff parameter Q(o) and the scale of alpha(s).