Color connections of the four-quark QQ¯Q′Q¯′ system and doubly heavy baryon production in e+e− annihilation

The hadronization effects induced by various color connections of the four-quark system in e+e− annihilation are briefly reviewed. A special color connection of the four-heavy-quark system with no color separation favors the production of doubly heavy baryons. For the related three-jet case, the corresponding hadronization has not yet been considered. We argue that it can be effectively described as two-string fragmentation in addition to the leading heavy diquark fragmentation. The production rate and the properties of the final-state hadron systems are discussed. Emphasis is placed on the string effect as a fingerprint of this hadronization procedure.