Elliptic flow of Λ hyperons in Pb+Pb collisions at158AGeV

Alt, C.; Anticic, T.; Baatar, B.; Barna, D.; Bartke, J.; Betev, L.; Białkowska, H.; Blume, C.; Boimska, B.; Botje, M.; Bracinik, J.; Bramm, R.; Bunčić, P.; Cerny, V.; Christakoglou, P.; Chung, P.; Chvala, O.; Cramer, J. G.; Csató, P.; Dinkelaker, P.; Eckardt, V.; Flierl, D.; Fodor, Z.; Foka, P.; Friese, V.; Gál, J.; Gaździcki, M.; Georgopoulos, G.; Gładysz, E.; Grebieszkow, K.; Hegyi, S.; Höhne, C.; Kadija, K.; Karev, A.; Kliemant, M.; Kniege, S.; Kolesnikov, V. I.; Kornas, E.; Korus, R.; Kowalski, M.; Kraus, I.; Kreps, M.; Lacey, R.; Laszlo, A.; Leeuwen, M. van; Lévai, P.; Litov, L.; Lungwitz, B.; Makariev, M.; Malakhov, A. I.; Mateev, M.; Melkumov, G. L.; Mischke, A.; Mitrovski, M.; Molnár, J.; Mrówczyński, St.; Nicolic, V.; Pálla, G.; Panagiotou, A. D.; Panayotov, D.; Petridis, A.; Pikna, M.; Prindle, D.; Pühlhofer, F.; Renfordt, R.; Roland, C.; Roland, G.; Rybczyński, M.; Rybicki, A.; Sandoval, A.; Schmitz, N.; Schuster, T.; Seyboth, P.; Siklér, F.; Sitar, B.; Skrzypczak, E.; Stefanek, G.; Stock, R.; Strabel, C.; Ströbele, H.; Susa, T.; Szentpétery, I.; Sziklai, J.; Szymanski, P.; Trubnikov, V.; Varga, D.; Vassiliou, M.; Veres, G. I.; Vesztergombi, G.; Vranić, D.; Wetzler, A.; Włodarczyk, Z.; Wojtaszek, A.; Yoo, I. K.; Zimányi, J.

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American Physical Society, Physical Review C, 4(75), 2007

DOI: 10.1103/physrevc.75.044901

Elsevier, Nuclear Physics A, (774), p. 499-502

DOI: 10.1016/j.nuclphysa.2006.06.074

IOP Publishing, Journal of Physics G: Nuclear and Particle Physics, 12(32), p. S547-S550

DOI: 10.1088/0954-3899/32/12/s74

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Elliptic flow of Λ hyperons in Pb+Pb collisions at158AGeV

Journal article published in 2007 by C. Alt, T. Anticic, B. Baatar, D. Barna, J. Bartke, L. Betev, H. Białkowska, C. Blume, B. Boimska, M. Botje, J. Bracinik, R. Bramm, P. Bunčić, V. Cerny, P. Christakoglou and other authors.

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Abstract

The elliptic flow of Lambda hyperons has been measured by the NA49 experiment at the CERN-SPS in semi-central Pb+Pb collisions at 158A GeV. The standard method of correlating particles with the event plane was used. Measurements of v2 near mid-rapidity are reported as a function of rapidity, centrality and transverse momentum. Elliptic flow of Lambda particles increases both with the impact parameter and with the transverse momentum. It is compared with v2 for pions and protons as well as with model calculations. The observation of large elliptic flow and its mass dependence suggest strong collective behaviour of the matter produced in collisions of heavy nuclei already at the SPS.

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Elliptic flow of Λ hyperons in Pb+Pb collisions at158AGeV

Abstract