LU TP 93-22
                                                          September 1993

               Deuteron production in e+e-annihilation

                         G\"osta Gustafson
                          Jari H\"akkinen

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