Directed and elliptic flow of charged pions and protons in Pb+Pb collisions at 40 and 158 AGeV

Alt, C.; Yoo, I.K.; Gladysz, E.; Eckardt, V.; Jacobs, P.; Fodor, Z.; Schmitz, N.; Mayes, B.W.; Zaranek, J.; Ollitrault, J.Y.; Reid, J.G.; Sziklai, J.; Bartke, J.; Betev, L.; Kadija, K.; Friese, V.; Sikler, F.; Csato, P.; Snellings, R.J.; Wlodarczyk, Z.; Vassiliou, M.; Bialkowska, H.; Georgopoulos, G.; Behler, M.; Kolesnikov, V.I.; Rybczynski, M.; Perl, K.; Pinsky, Lawrence S.; Blume, C.; Voloshin, S.A.; Cramer, J.G.; Panagiotou, A.D.; Markert, C.; Stefanek, G.; Barna, D.; Poskanzer, Arthur M.; van Leeuwen, M.; Vranic, D.; Kraus, I.; Chvala, O.; Roland, G.; Hohne, C.; Gal, J.; Hegyi, S.; Mischke, A.; Petridis, A.; Palla, G.; Odyniec, G.; Retyk, W.; Brun, R.; Botje, M.; Mitrovski, M.; Mrowczynski, S.; Dinh, P.M.; Dinkelaker, P.; Baatar, B.; Kowalski, M.; Kniege, S.; Susa, T.; Levai, P.; Skrzypczak, E.; Kollegger, T.; Gazdzicki, M.; Billmeier, A.; Sitar, B.; Bramm, R.; Anticic, T.; Melkumov, G.L.; Rybicki, A.; Stock, R.; Strobele, H.; Pikna, M.; Filip, P.; Freund, P.; Molnar, J.; Szentpetery, I.; Trainor, T.A.; Puhlhofer, F.; Korus, R.; Malakhov, A.I.; Kreps, M.; Renfordt, R.; Zimanyi, J.; Buncic, P.; Cerny, V.; Karev, A.; Boimska, B.; Sann, H.; Foka, P.; Varga, D.; Seyboth, P.; Ritter, H.G.; Cooper, G.E.; Meurer, C.; Veres, G.I.; Vesztergombi, G.; Bracinik, J.; Sandoval, A.; Wetzler, A.; Borghini, N.; Roland, C.

doi:10.1103/PhysRevC.68.034903

Article
Report number	nucl-ex/0303001 ; SACLAY-SPHT-T-2003-050
Title	Directed and elliptic flow of charged pions and protons in Pb+Pb collisions at 40 and 158 AGeV
Related title	PION
Author(s)	Alt, C. ; Anticic, T. ; Baatar, B. ; Barna, D. ; Bartke, J. ; Behler, M. ; Betev, L. ; Bialkowska, H. ; Billmeier, A. ; Blume, C. ; Boimska, B. ; Borghini, N. ; Botje, M. ; Bracinik, J. ; Bramm, R. ; Brun, R. ; Buncic, P. ; Cerny, V. ; Chvala, O. ; Cooper, G.E. ; Cramer, J.G. ; Csato, P. ; Dinh, P.M. ; Dinkelaker, P. ; Eckardt, V. ; Filip, P. ; Fodor, Z. ; Foka, P. ; Freund, P. ; Friese, V. ; Gal, J. ; Gazdzicki, M. ; Georgopoulos, G. ; Gladysz, E. ; Hegyi, S. ; Hohne, C. ; Jacobs, P. ; Kadija, K. ; Karev, A. ; Kniege, S. ; Kolesnikov, V.I. ; Kollegger, T. ; Korus, R. ; Kowalski, M. ; Kraus, I. ; Kreps, M. ; van Leeuwen, M. ; Levai, P. ; Malakhov, A.I. ; Markert, C. ; Mayes, B.W. ; Melkumov, G.L. ; Meurer, C. ; Mischke, A. ; Mitrovski, M. ; Molnar, J. ; Mrowczynski, S. ; Odyniec, G. ; Ollitrault, J.Y. ; Palla, G. ; Panagiotou, A.D. ; Perl, K. ; Petridis, A. ; Pikna, M. ; Pinsky, Lawrence S. ; Poskanzer, Arthur M. ; Puhlhofer, F. ; Reid, J.G. ; Renfordt, R. ; Retyk, W. ; Ritter, H.G. ; Roland, C. ; Roland, G. ; Rybczynski, M. ; Rybicki, A. ; Sandoval, A. ; Sann, H. ; Schmitz, N. ; Seyboth, P. ; Sikler, F. ; Sitar, B. ; Skrzypczak, E. ; Snellings, R.J. ; Stefanek, G. ; Stock, R. ; Strobele, H. ; Susa, T. ; Szentpetery, I. ; Sziklai, J. ; Trainor, T.A. ; Varga, D. ; Vassiliou, M. ; Veres, G.I. ; Vesztergombi, G. ; Voloshin, S.A. ; Vranic, D. ; Wetzler, A. ; Wlodarczyk, Z. ; Yoo, I.K. ; Zaranek, J. ; Zimanyi, J.
Affiliation	(Fachbereich Physik der Universitat, Frankfurt, Germany) ; (Rudjer Boskovic Institute, Zagreb, Croatia) ; (Joint Institute for Nuclear Research, Dubna, Russia) ; (KFKI Research Institute for Particle and Nuclear Physics, Budapest, Hungary) ; (Institute of Nuclear Physics, Cracow, Poland) ; (Fachbereich Physik der Universitat, Marburg, Germany) ; (Institute for Nuclear Studies, Warsaw, Poland) ; (Universite Libre de Bruxelles, Brussels, Belgium) ; (NIKHEF, Amsterdam, Netherlands) ; (Comenius University, Bratislava, Slovakia) ; (CERN) ; (Institute of Particle and Nuclear Physics, Charles University, Prague, Czech Republic) ; (Lawrence Berkeley National Laboratory, Berkeley, California, USA) ; (Nuclear Physics Laboratory, University of Washington, Seattle, Washington, USA) ; (SPhT, CEA-Saclay, Gif-sur-Yvette, France) ; (Max-Planck-Institut fur Physik, Munich, Germany) ; (Gesellschaft fur Schwerionenforschung (GSI), Darmstadt, Germany) ; (Department of Physics, University of Athens, Athens, Greece) ; (Swietokrzyska Academy, Kielce, Poland) ; (University of Houston, Houston, Texas, USA) ; (L.P.N.H.E., Universite Pierre et Marie Curie, Paris, France) ; (Institute for Experimental Physics, University of Warsaw, Warsaw, Poland) ; (MIT, Cambridge, Massachusetts, USA) ; (Wayne State University, Detroit, Michigan, USA)
Publication	2003
Imprint	4 Mar 2003
Number of pages	35
Note	Comments: To be published in Phys. Rev. C, 37 pages, 29 figures, version accepted for publication, contains now a weblink to data shown in the figures: See http://na49info.cern.ch/na49/Archives/Data/FlowWebPage/ To be published in Phys. Rev. C, 37 pages, 29 figures, version accepted for publication, contains now a weblink to data shown in the figures: See http://na49info.cern.ch/na49/Archives/Data/FlowWebPage/
In:	Phys. Rev. C 68 (2003) 034903
DOI	10.1103/PhysRevC.68.034903
Subject category	Nuclear Physics - Experiment
Abstract	Directed and elliptic flow measurements for charged pions and protons are reported as a function of transverse momentum, rapidity, and centrality for 40 and 158 AGeV Pb + Pb collisions as recorded by the NA49 detector. Both the standard method of correlating particles with an event plane, and the cumulant method of studying multiparticle correlations are used. In the standard method the directed flow is corrected for conservation of momentum. In the cumulant method elliptic flow is reconstructed from genuine 4, 6, and 8-particle correlations, showing the first unequivocal evidence for collective motion in A+A collisions at SPS energies.

$(Color online) The experimental set--up of the NA49 experiment \protect\cite{na49_nim}.$ $noimgListed for the two beam energies and six centralities are: $E^0/E^0_{beam}$, the forward calorimeter energy divided by the beam energy; $\mean{E^0/E^0_{beam}}$, the mean value; $\sigma/\sigma_T$, the fraction of the total cross section in that bin; the integral of $\sigma/\sigma_T$; $b$, the estimated range of impact parameters; $\mean{b}$, the estimated mean impact parameter; $\mean{N_{WN}}$, the estimated number of wounded nucleons, and $\mean{N_{part}}$, the estimated mean number of participants. The 6 bins in centrality have different values of $E^0/E^0_{beam}$ at 40 and 158$A$ GeV since the acceptance of the forward calorimeter depends on beam energy.$