HAL : in2p3-00023318, version 1

arXiv : nucl-ex/0411024

DOI : 10.1016/j.physletb.2005.02.060

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Physics Letters B 612 (2005) 173-180

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

A. Andronic, V. Barret1, Z. Basrak, N. Bastid1, L. Benabderrahmane, G. Berek, R. Caplar, E. Cordier, P. Crochet1, P. Dupieux1, M. Dzelalija, Z. Fodor, I. Gasparic, Yu. Grishkin, O.N. Hartmann, N. Herrmann, K.D. Hildenbrand, B. Hong, J. Kecskemeti, Y.J. Kimi, M. Kirejczyk, P. Koczon, M. Korolija, R. Kotte, T. Kress, A. A. Lebedev, Y. Leifels, X. Lopez1, A. Mangiarotti, M. Merschmeyer, W. Neubert, D. Pelte, M. Petrovici A, F. Rami2, W. Reisdorf, B. De Schauenburg2, A. Schuttauf, Z. Seres, B. Sikora, K.S. Simi, V. Simion, K. Siwek-Wilczynska, V. Smolyankin, M.R. Stockmeier, G. Stoicea, Z. Tyminski, P. Wagner2, K. Wisniewski, D. Wohlfarth, Z.G. Xiao, I. Yushmanov, A. Zhilin

FOPI Collaboration(s)

(2005)

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

1 :	LPC-CLERMONT - Laboratoire de Physique Corpusculaire de Clermont-Ferrand
2 :	IReS - Institut de Recherches Subatomiques

Thème(s)

:

Physique/Physique Nucléaire Expérimentale

in2p3-00023318, version 1

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Contributeur : Jeanine Pellet <>

Soumis le : Mercredi 17 Novembre 2004, 17:58:09

Dernière modification le : Mercredi 13 Avril 2005, 09:38:32