Phys. Rev. Lett. 94, 162301 (2005) [4 pages]Charged Meson Rapidity Distributions in Central Au+Au Collisions at √sNN=200 GeVReceived 24 March 2004; published 28 April 2005 We have measured rapidity densities dN/dy of π± and K± over a broad rapidity range (-0.1<y<3.5) for central Au+Au collisions at √sNN=200 GeV. These data have significant implications for the chemistry and dynamics of the dense system that is initially created in the collisions. The full phase-space yields are 1660±15±133 (π+), 1683±16±135 (π-), 286±5±23 (K+), and 242±4±19 (K-). The systematics of the strange to nonstrange meson ratios are found to track the variation of the baryochemical potential with rapidity and energy. Landau-Carruthers hydrodynamics is found to describe the bulk transport of the pions in the longitudinal direction. © 2005 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.94.162301
DOI:
10.1103/PhysRevLett.94.162301
PACS:
25.75.Dw
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