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arXiv · 1101.2361

Symmetry energy from elliptic flow in 197Au + 197Au

P. Russotto·P. Z. Wu·M. Zoric·M. Chartier·Y. Leifels·R. C. Lemmon·Q. Li·J. Lukasik·A. Pagano·P. Pawlowski·W. Trautmann
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Abstract

The elliptic-flow ratio of neutrons with respect to protons or light complex particles in reactions of neutron-rich systems at relativistic energies is proposed as an observable sensitive to the strength of the symmetry term in the equation of state at supra-normal densities. The results obtained from the existing FOPI/LAND data for 197Au + 197Au collisions at 400 MeV/nucleon in comparison with the UrQMD model favor a moderately soft symmetry term with a density dependence of the potential term proportional to rho/rho_0^gamma with gamma = 0.9 +- 0.4.

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P. Russotto, P. Z. Wu, M. Zoric, M. Chartier, Y. Leifels, R. C. Lemmon, Q. Li, J. Lukasik, A. Pagano, P. Pawlowski, W. Trautmann. 2011-01-12. Symmetry energy from elliptic flow in 197Au + 197Au. https://doi.org/10.1016/j.physletb.2011.02.033

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