Color Screening Effects on Hadronization in Relativistic Heavy Ion Collisions

摘要

The effects of color screening on the hadronization of a parton plasma into ahadron gas are examined at the energies of the relativistic heavy ion collider.It is found to have the tendency to prevent hadronization and thereforedelaying the conversion of the partons into a hadron gas. Because of thecontinual expansion, the resulting hadron gas number densities are lower whenscreening is included. This should reduce the hadronic noise to genuine signalsof the quark-gluon plasma. In this sense, color screening is favorable andshould be included in numerical models. In any case, we advocate that numericalmodels should allow the confining forces and color screening to act on eachother so as to undergo the phase transition in a natural way. Hadronization isalso shown to seriously disrupt parton equilibration and is yet another reasonwhy full parton chemical equilibration should not be expected.