Differential Directed Flow in Au+Au Collisions

Andronic, A.; Reisdorf, W.; Alard, J. P.; Barret, V.; Basrak, Z.; Bastid, N.; Bendarag, A.; Berek, G.; Caplar, R.; Crochet, P.; Devismes, A.; Dupieux, P.; Dzelalija, M.; Finck, C.; Fodor, Z.; Gobbi, A.; Grishkin, Yu.; Hartmann, O. N.; Herrmann, N.; Hildenbrand, K. D.; Hong, B.; Kecskemeti, J.; Kim, Y. J.; Kirejczyk, M.; Koczon, P.; Korolija, M.; Kotte, R.; Kress, T.; Kutsche, R.; Lebedev, A.; Leifels, Y.; Neubert, W.; Pelte, D.; Petrovici, M.; Rami, F.; Schauenburg, B. de; Schüll, D.; Seres, Z.; Sikora, B.; Sim, K. S.; Simion, V.; Siwek-Wilczynska, K.; Smolyankin, V.; Stockmeier, M. R.; Stoicea, G.; Wagner, P.; Wisniewski, K.; Wohlfarth, D.; Yushmanov, I.; Zhilin, A.

Differential Directed Flow in Au+Au Collisions

Andronic, A.; Reisdorf, W.; Alard, J. P.; Barret, V.; Basrak, Z.; Bastid, N.; Bendarag, A.; Berek, G.; Caplar, R.; Crochet, P.; Devismes, A.; Dupieux, P.; Dzelalija, M.; Finck, C.; Fodor, Z.; Gobbi, A.; Grishkin, Y.; Hartmann, O. N.; Herrmann, N.; Hildenbrand, K. D.; Hong, B.; Kecskemeti, J.; Kim, Y. J.; Kirejczyk, M.; Koczon, P.; Korolija, M.; Kotte, R.; Kress, T.; Kutsche, R.; Lebedev, A.; Leifels, Y.; Neubert, W.; Pelte, D.; Petrovici, M.; Rami, F.; de Schauenburg, B.; Schüll, D.; Seres, Z.; Sikora, B.; Sim, K. S.; Simion, V.; Siwek-Wilczynska, K.; Smolyankin, V.; Stockmeier, M. R.; Stoicea, G.; Wagner, P.; Wisniewski, K.; Wohlfarth, D.; Yushmanov, I.; Zhilin, A.

We present experimental data on directed flow in semi-central Au+Au collisions at incident energies from 90 to 400 AMeV. For the first time for this energy domain, the data are presented in a transverse momentum differential way. We study the first order Fourier coefficient v1 for different particle species and establish a gradual change of its pattern as function of incident energy and for different regions in rapidity.

Keywords: PACS: 25.75.Ld

Phys. Rev. C 64 (2001) 41604

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