QCD DEMONSTRATION FOR THE COLOR STRING STRUCTURES OF E(-)-]Q(Q)OVER-BAR-G AND UPSILON-]3G SYSTEMS()E()

The e+e- --> qqgBAR --> 3 jets and UPSILON --> 3g --> hadrons processe s are well suited to the study of the gluon hadronization mechanism. I n the LUND model, these two processes are treated by applying the stri ng fragmentation model to the assumed color string structure of qqgBAR and 3g systems. In this paper, the color string structure of the qqgB AR and ggg systems is given by directly analyzing their color wave fun ctions in the context of perturbative QCD. In addition, the reasonable ness and accuracy of the LUND string pictures are discussed.