The effect of hadronization on the instabilities in an expanding parton plasma

The growth rate for instabilities in an expanding parton plasma is investig ated by using a quasiparticle transport model including hadronization. The coupled Boltzmann equations for partons and pions with time dependent mean field masses and source terms are solved in the Bjorken boost invariant pic ture. Hadronization modifies the known instability in the parton plasma cre ated by the mean field in two ways: In the beginning, hadronization increas es the rate Gamma of instability, but then Gamma --> 0 when the hadronizati on is dominating the time evolution.