DYNAMICS OF PHASE-TRANSITION INCLUDING QUARK-FRAGMENT EFFECTS FOR AN EXPANSION QUARK-GLUON PLASMA

The (1 + 1) dimensional relativistic hydrodynamics equation with a sou rce term including quark-fragment effects is numerically solved and th e evolution of energy density, flow rapidity, and baryon number densit y as the characteristic values of the phase transition possibly produc ed in nuclear collisions at extreme high energy are also analyzed. The quark-fragment effects in the source term are described by using the phenomenological SU(3) string model with a flavor dynamics. The numeri cal results are compared with Kajantie's data. It illustrates indirect ly that the results are consistent with the experimental data. The phy sics picture of our model presented in this paper shows that the pheno menological self-consistent model is reasonable.