The High-Density Symmetry Energy in Heavy Ion Collisions

Details The High-Density Symmetry Energy in Heavy Ion Collisions The High-Density Symmetry Energy in Heavy Ion Collisions

2008-12-15

arxiv.org/abs/0812.2806v1

Physics

Nuclear Physics

Nuclear Theory

7 pages, 5 figures. Proceedings of the 2008 Erice School on Nuclear Physics

Scientific paper

The nuclear symmetry energy as a function of density is rather poorly constrained theoretically and experimentally both below saturation density, but particularly at high density, where very few relevant experimental data exist. We discuss observables which could yield information on this question, in particular, proton-neutron flow differences, and the production of pions and kaons in relativistic heavy ion collisions. For the meson production we investigate particularly ratios of the corresponding isospin partners $\pi^-/\pi^+$ and $K^0/K^+$, where we find that the kaons are an interesting probe to the symmetry energy. In this case we also discuss the influnece of various choices for the kaon potentials or in-medium effective masses.

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