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arXiv · 0904.3495

Differential Neutron-Proton Squeeze-out

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

The elliptic flow (squeeze-out) of neutrons, protons and 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. Preliminary results from a study of the existing FOPI/LAND data for 197Au + 197Au collisions at 400 A MeV 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 = 0.6+-0.3.

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W. Trautmann, M. Chartier, Y. Leifels, R. C. Lemmon, Q. Li, J. Lukasik, A. Pagano, P. Pawlowski, P. Russotto, P. Wu. 2009-04-22. Differential Neutron-Proton Squeeze-out. https://doi.org/10.1016/j.ppnp.2008.12.012

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