Cylindrical expansion and hadronization of quark-gluon fluid

A model of multi-particle production assuming the formation of the quark-gluon plasma is proposed. The hadronization is realized via the cylindrical expansion of quark-gluon fluid. The momentum spectrum of hadron is related to the expansion velocity of the fluid. The transverse expansion velocity of the fluid is related to the initial energy density ε0 of quark-gluon plasma, and the value of ε0 is assumed to be mainly controlled by the color dimension of the flux tube. The model well explains the panti p collider data of correlation between the average pt and the central particle density. (author)