Elliptic flow of Λ hyperons in Pb+Pb collisions at158AGeV

• DOI: 10.1103/physrevc.75.044901
• Publication Date: 2007-04-09T19:42:14Z
• Authors: 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; P. Chung; O. Chvala; J. G. Cramer; P. Csató; P. Dinkelaker; V. Eckardt; D. Flierl; Z. Fodor; P. Foka; V. Friese; J. Gál; M. Gaździcki; G. Georgopoulos; E. Gładysz; K. Grebieszkow; S. Hegyi; C. Höhne; K. Kadija; A. Karev; M. Kliemant; S. Kniege; V. I. Kolesnikov; E. Kornas; R. Korus; M. Kowalski; I. Kraus; M. Kreps; R. Lacey; A. Laszlo; M. van Leeuwen; P. Lévai; L. Litov; B. Lungwitz; M. Makariev; A. I. Malakhov; M. Mateev; G. L. Melkumov; A. Mischke; M. Mitrovski; J. Molnár; St. Mrówczyński; V. Nicolic; G. Pálla; A. D. Panagiotou; D. Panayotov; A. Petridis; M. Pikna; D. Prindle; F. Pühlhofer; R. Renfordt; C. Roland; G. Roland; M. Rybczyński; A. Rybicki; A. Sandoval; N. Schmitz; T. Schuster; P. Seyboth; F. Siklér; B. Sitar; E. Skrzypczak; G. Stefanek; R. Stock; C. Strabel; H. Ströbele; T. Susa; I. Szentpétery; J. Sziklai; P. Szymanski; V. Trubnikov; D. Varga; M. Vassiliou; G. I. Veres; G. Vesztergombi; D. Vranić; A. Wetzler; Z. Włodarczyk; A. Wojtaszek; I. K. Yoo; J. Zimányi
• Keywords: Elliptic flow; Coalescence (physics); Multiplicity (mathematics)

The elliptic flow of Λ hyperons has been measured by the NA49 Collaboration at CERN-SPS in semicentral Pb+Pb collisions 158A GeV. standard method correlating particles with event plane was used. Measurements v2 near midrapidity are reported as a function rapidity, centrality and transverse momentum. Elliptic increases both impact parameter It is compared for pions protons well model calculations. observation significant its mass dependence suggest strong collective behavior matter produced heavy nuclei already SPS. Scaling properties different particle species have tested limited pT range data does not allow decisive test coalescence model.Received 8 June 2006DOI:https://doi.org/10.1103/PhysRevC.75.044901©2007 American Physical Society