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

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Abstract

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
Volume612
Issue number3-4
DOIs
Publication statusPublished - Apr 21 2005

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Keywords

  • Compressed nuclear matter
  • Elliptic flow
  • Equation of state

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Andronic, A., Barret, V., Basrak, Z., Bastid, N., Benabderrahmane, L., Berek, G., Čaplar, R., Cordier, E., Crochet, P., Dupieux, P., Dželalija, M., Fodor, Z., Gasparic, I., Grishkin, Y., Hartmann, O. N., Herrmann, N., Hildenbrand, K. D., Hong, B., Kecskemeti, J., ... Zhilin, A. (2005). Excitation function of elliptic flow in Au + Au collisions and the nuclear matter equation of state. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 612(3-4), 173-180. https://doi.org/10.1016/j.physletb.2005.02.060