Excitation function of elliptic flow in Au+Au collisions and the nuclear matter equation of state

Details Excitation function of elliptic flow in Au+Au collisions and the nuclear matter equation of state Excitation function of elliptic flow in Au+Au collisions and the nuclear matter equation of state

2004-11-12

arxiv.org/abs/nucl-ex/0411024v1

Phys.Lett. B612 (2005) 173-180

Physics

Nuclear Physics

Nuclear Experiment

10 pages, 4 eps figures, submitted for publication. Data files will be available at http://www.gsi.de/~fopiwww/pub/

Scientific paper

We present measurements of the excitation function of elliptic flow at midrapidity in Au+Au collisions at beam energies from 0.09 to 1.49 GeV per nucleon. For the integral flow, we discuss the interplay between collective expansion and spectator shadowing for three centrality classes. A complete excitation function of transverse momentum dependence of elliptic flow is presented for the first time in this energy range, revealing a rapid change with incident energy below 0.4 AGeV, followed by an almost perfect scaling at the higher energies. The equation of state of compressed nuclear matter is addressed through comparisons to microscopic transport model calculations.

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