Hadronic dissipative effects on transverse dynamics at RHIC

We simulate the dynamics of Au+Au collisions at the relativistic heavy ion collider (RHIC) with a hybrid model that treats the quark-gluon plasma macroscopically as an ideal fluid, but models the hadron resonance gas microscopically using a hadronic cascade. We find that much of the mass-ordering pattern for v₂(p_T) observed at RHIC is generated during the hadronic stage due to build-up of additional radial flow. We also find that the mass-ordering pattern is violated for mesons due to small interaction cross section in the hadron resonance gas.