Systematics of azimuthal asymmetries in heavy ion collisions in the 1AGeV regime

W. Reisdorf, Y. Leifels, A. Andronic, R. Averbeck, V. Barret, Z. Basrak, N. Bastid, M. L. Benabderrahmane, R. Čaplar, P. Crochet, P. Dupieux, M. Dželalija, Z. Fodor, P. Gasik, Y. Grishkin, O. N. Hartmann, N. Herrmann, K. D. Hildenbrand, B. Hong, T. I. KangJ. Kecskemeti, Y. J. Kim, M. Kirejczyk, M. Kiš, P. Koczoń, M. Korolija, R. Kotte, T. Kress, A. Lebedev, X. Lopez, T. Matulewicz, M. Merschmeyer, W. Neubert, M. Petrovici, K. Piasecki, F. Rami, M. S. Ryu, A. Schüttauf, Z. Seres, B. Sikora, K. S. Sim, V. Simion, K. Siwek-Wilczyńska, V. Smolyankin, M. Stockmeier, G. Stoicea, Z. Tymiński, K. Wiśniewski, D. Wohlfarth, Z. G. Xiao, H. S. Xu, I. Yushmanov, A. Zhilin

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Abstract

Using the large acceptance apparatus FOPI, we study central and semi-central collisions in the reactions (energies in AGeV 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.

Original languageEnglish
Pages (from-to)1-60
Number of pages60
JournalNuclear Physics A
Volume876
DOIs
Publication statusPublished - 2012 Feb 15

Keywords

  • Directed flow
  • Elliptic flow
  • Heavy ions
  • Isospin
  • Nuclear equation of state

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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    Reisdorf, W., Leifels, Y., Andronic, A., Averbeck, R., Barret, V., Basrak, Z., Bastid, N., Benabderrahmane, M. L., Čaplar, R., Crochet, P., Dupieux, P., Dželalija, M., Fodor, Z., Gasik, P., Grishkin, Y., Hartmann, O. N., Herrmann, N., Hildenbrand, K. D., Hong, B., ... Zhilin, A. (2012). Systematics of azimuthal asymmetries in heavy ion collisions in the 1AGeV regime. Nuclear Physics A, 876, 1-60. https://doi.org/10.1016/j.nuclphysa.2011.12.006