Phys. Rev. Lett. 89, 222301 (2002) [4 pages]Pseudorapidity and Centrality Dependence of the Collective Flow of Charged Particles in Au+Au Collisions at √sNN=130 GeVReceived 29 May 2002; published 7 November 2002 This paper describes the measurement of collective flow for charged particles in Au+Au collisions at √sNN=130 GeV using the PHOBOS detector at the Relativistic Heavy Ion Collider (RHIC). The measured azimuthal hit anisotropy is presented over a wide range of pseudorapidity (-5.0<η<5.3) for the first time at this energy. The result, averaged over momenta and particle species, is observed to reach 7% for peripheral collisions at midrapidity, falling off with centrality and increasing |η|. These results call into question the common assumption of longitudinal boost invariance over a large region of rapidity in RHIC collisions. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.89.222301
DOI:
10.1103/PhysRevLett.89.222301
PACS:
25.75.–q
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