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

Details Directed and elliptic flow of charged pions and protons in Pb+Pb collisions at 40 and 158A GeV Directed and elliptic flow of charged pions and protons in Pb+Pb collisions at 40 and 158A GeV

2003-03-04

arxiv.org/abs/nucl-ex/0303001v2

Phys.Rev. C68 (2003) 034903

Physics

Nuclear Physics

Nuclear Experiment

To be published in Phys. Rev. C, 37 pages, 29 figures, version accepted for publication, contains now a weblink to data shown

Scientific paper

Directed and elliptic flow measurements for charged pions and protons are reported as a function of transverse momentum, rapidity, and centrality for 40 and 158A GeV 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.

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