Elliptic Flow: Transition from Out-of-Plane to In-Plane Emission inAu<mml:mspace/>+<mml:mspace/>AuCollisions

1999/03/17 by E895 collaboration, C. Pinkenburg, N. N. Ajitanand +53 · 4 citations
Engineering · Materials Science · Physics and Astronomy · #Fusion materials and technologies #High-Energy Particle Collisions Research #Nuclear reactor physics and engineering #nucl-ex

paper · pdf · doi:10.1103/physrevlett.83.1295

published as Phys.Rev.Lett.83:1295-1298,1999 · 5 pages, 3 figures, Submitted to Phys. Rev. Lett

arxiv created 1999/03/17 · openalex publication_date 1999/08/16 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/01

Abstract

We have measured the proton elliptic flow excitation function for the Au+Au system spanning the beam energy range (2--8)AGeV. The excitation function shows a transition from negative to positive elliptic flow at a beam energy, E_tr\ensuremath∼4AGeV. Detailed comparisons with calculations from a relativistic Boltzmann equation are presented. The comparisons suggest a softening of the nuclear equation of state from a stiff form ( K\ensuremath∼380MeV) at low beam energies ( E_beam\ensuremath≤2AGeV) to a softer form ( K\ensuremath∼210MeV) at higher energies ( E_beam\ensuremath≥4AGeV) where the calculated baryon density \ensuremathρ\ensuremath∼4\ensuremathρ₀.

Citations

• Flow systematics from SIS to SPS energies

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