Disappearance of Elliptic Flow: A New Probe for the Nuclear Equation of   State
  Using a relativistic hadron transport model, we investigate the utility of the elliptic flow excitation function as a probe for the stiffness of nuclear matter and for the onset of a possible quark-gluon-plasma (QGP) phase-transition at AGS energies 1 < E_Beam < 11 AGeV. The excitation function shows a strong dependence on the nuclear equation of state, and exhibits characteristic signatures which could signal the onset of a phase transition to the QGP. 
P. Danielewicz (2), Roy A. Lacey (1), P.-B. Gossiaux (2,3), C.   Pinkenburg (1), P. Chung (1), J. M. Alexander (1), and R. L...