Flow and the equation of state at RHIC

by Edward Shuryak (Stony Brook)

Friday 15 Jun 2001, 11:00 → 12:00 Europe/Zurich

TH Auditorium (CERN)

The first part of the talk summarizes our current understanding of spectacular collective explosion taking place in heavy ion collisions at RHIC energies. We show that Hydro-to-Hadrons (H2H) model, combining hydro at QGP/mixed phases with hadronic cascade (RQMD) in the hadronic phase provides rather accurate description of elliptic and radial flow. Good description is also provided to the SPS data, as well as rather to peripheral collisions at RHIC. Surprisingly, baryons/antibaryons with transverse momenta up to 2-3 GeV are also well described. All of this can only exist due to 'QGP push' at early stages, and a particular EoS, consistent with lattice, emerges from global analysis. The second part of the talk summarizes the situation more generally. Jet quenching and its azimuthal dependence indicate that not only QGP is there, but it seem to have nearly all of the final entropy rather early. Since naive perturbative picture (HIJING) does not explain it, other alternatives with non-perturbative production mechanism are discussed.

Organiser(s): Yiota Foka, Guy Paic and Urs Wiedemann

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