Heavy Quark Fragmentation into Baryons in a Quark-Diquark Model

摘要

In the framework of the nonrelativistic QCD and a quark-diquark model ofbaryons we have obtained the fragmentation functions for heavy quark to splitinto spin-1/2 and spin-3/2 double heavy baryons. It was predicted theproduction rates as well as the shape of the energy spectra for the $cc-$ and$bc-$baryons in the region of $Z^o$ peak at LEP collider.