Hadronization properties in ? ? e e annihilation at S ? 60GeV centre of mass energy

The hadronic events from the experimental data , as well as the PYTHIA Monte-carlo data at the 60 GeV centre of mass energies are studied.We present the general properties of multihadron final states produced by e e ? ? .Global shape, inclusive charged-particle, and particle-flow distributions are presented. Our measurements are compared with QCD + fragmentation models that use either leading-logarithmic parton-shower evolution or QCD matrix elements at the parton level, and either string or cluster fragmentation for hadronization. Possible explanations for ourcompariaon are presented in this paper.