Excitation function of elliptic flow in Au + Au collisions and the nuclear matter equation of state

A. Andronic, V. Barret, Z. Basrak, N. Bastid, L. Benabderrahmane, G. Berek, R. Čaplar, E. Cordier, P. Crochet, P. Dupieux, M. Dželalija, Z. Fodor, I. Gasparic, Yu Grishkin, O. N. Hartmann, N. Herrmann, K. D. Hildenbrand, B. Hong, J. Kecskemeti, Y. J. KimM. Kirejczyk, P. Koczon, M. Korolija, R. Kotte, T. Kress, A. Lebedev, Y. Leifels, X. Lopez, A. Mangiarotti, M. Merschmeyer, W. Neubert, D. Pelte, M. Petrovici, F. Rami, W. Reisdorf, B. De Schauenburg, A. Schüttauf, Z. Seres, B. Sikora, K. S. Sim, V. Simion, K. Siwek-Wilczyńska, V. Smolyankin, M. R. Stockmeier, G. Stoicea, Z. Tyminski, P. Wagner, K. Wiśniewski, D. Wohlfarth, Z. G. Xiao, I. Yushmanov, A. Zhilin

Research output: Contribution to journalArticlepeer-review

154 Citations (Scopus)


We present measurements of the excitation function of elliptic flow at midrapidity in Au + Au collisions at beam energies from 0.09 to 1.49 GeV per nucleon. For the integral flow, we discuss the interplay between collective expansion and spectator shadowing for three centrality classes. A complete excitation function of transverse momentum dependence of elliptic flow is presented for the first time in this energy range, revealing a rapid change with incident energy below 0.4 AGeV, followed by an almost perfect scaling at the higher energies. The equation of state of compressed nuclear matter is addressed through comparisons to microscopic transport model calculations.

Original languageEnglish
Pages (from-to)173-180
Number of pages8
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number3-4
Publication statusPublished - 2005 Apr 21

Bibliographical note

Funding Information:
This work was partly supported by the German BMBF under Contracts No. 06HD953 and No. RUM-99/010 and by KRF under Grant No. 2002-015-CS0009.


  • Compressed nuclear matter
  • Elliptic flow
  • Equation of state

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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