DEUTERON PRODUCTION IN E(+)E(-)-ANNIHILATION

We argue that in e+e--annihilation (including UPSILON-decay) deuteron production should be given by the overlap of the deuteron wave functio n with the wave function of a pn-pair. The production rate depends sen sitively upon the size of the production region. Taking into account t he strong correlation between protons and neutrons, experimental resul ts for UPSILON-decay are consistent with the size expected in the Lund string fragmentation model. A prediction is given for the deuteron pr oduction in Z-decay.