Summary Of Quark Matter And Heavy Ion Parallel Session, Cipanp06

This is clearly an exciting time to be working in the field of relativistic heavy ions, due to RHIC, a running facility dedicated to the study of quark matter at high energy density. Collective phenomena in collisions of ions at high energy indicate that the medium behaves as a liquid with extremely low viscosity, as an essentially perfect liquid. Talks during the session addressed progress in testing this hypothesis and measuring the viscosity. New progress in constituent quark number scaling at intermediate p(T), which may identify the relevant degrees of freedom at hadronization, was reported. There has also been significant progress towards full jet emission tomography of the collision zone, using the physical phenomenon of jet quenching, discovered at RHIC. Finally, possible thermometers of the collision zone have been identified and promising measurements towards their use have been made.