Studying color connection effects ofe+e−→cc¯cc¯→Ξcc+Xprocess within quark combination model

Abstract

The color connection of the parton system is an important bridge to connect the perturbative process and the hadronization one. The special color connection of four-heavy-quark system in e + e annihilation, which is the necessary one for the doubly heavy baryon and tetraquark productions is revisited. The hadronization effects, investigated with the help of the Quark Combination Model are compared with the corresponding results employing the Lund String Model in our previous work. The global properties related to a certain color connection are not sensitive to various hadronization models. In high energy collisions, hadronization is one of the most important processes for understanding the nonperturbative quantum chromodynamics and the confinement mechanism. e + e − annihilation has the advantage that the hadronization results can be compared with the experimental data directly to extract informations of hadronization because of no hadrons in the initial states. To embed the parton system into a hadronization model, it is necessary to specify the concrete color connection. However, the color connection for multi-parton system is not unique. Some clues can be obtained by analyzing the decomposition of the color space of the final partons [1– 5]. One of the interesting and important examples is the four-heavy-quark system (QQ ′ ¯ Q ¯