Systematics of azimuthal asymmetries in heavy ion collisions in the 1 A GeV regime

Details Systematics of azimuthal asymmetries in heavy ion collisions in the 1 A GeV regime Systematics of azimuthal asymmetries in heavy ion collisions in the 1 A GeV regime

2011-12-14

arxiv.org/abs/1112.3180v1

Physics

Nuclear Physics

Nuclear Experiment

70 pages, 52 figures; accepted for publication in Nuclear Physics A

Scientific paper

Using the large acceptance apparatus FOPI, we study central and semi-central collisions in the reactions (energies in A GeV are given in parentheses): 40Ca+40Ca (0.4, 0.6, 0.8, 1.0, 1.5, 1.93), 58Ni+58Ni (0.15, 0.25, 0.4), 96Ru+96Ru (0.4, 1.0, 1.5), 96Zr+96Zr (0.4, 1.0, 1.5), 129Xe+CsI (0.15, 0.25, 0.4), 197Au+197Au (0.09, 0.12, 0.15, 0.25, 0.4, 0.6, 0.8, 1.0, 1.2, 1.5). The observables include directed and elliptic flow. The data are compared to earlier data where possible and to transport model simulations. A stiff nuclear equation of state is found to be incompatible with the data. Evidence for extra-repulsion of neutrons in compressed asymmetric matter is found.

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