Charged meson rapidity distributions in central Au + Au collisions at √sNN = 200 GeV

I. G. Bearden, D. Beavis, C. Besliu, B. Budick, H. Bøggild, C. Chasman, C. H. Christensen, P. Christiansen, J. Cibor, R. Debbe, E. Enger, J. J. Gaardhøje, M. Germinario, K. Hagel, O. Hansen, A. Holm, A. K. Holme, H. Ito, A. Jipa, F. JundtJ. I. Jørdre, C. E. Jørgensen, R. Karabowicz, E. J. Kim, T. Kozik, T. M. Larsen, J. H. Lee, Y. K. Lee, G. Løvhøiden, Z. Majka, A. Makeev, M. Mikelsen, M. Murray, J. Natowitz, B. S. Nielsen, J. Norris, K. Olchanski, D. Ouerdane, R. Planeta, F. Rami, C. Ristea, D. Röhrich, B. H. Samset, D. Sandberg, S. J. Sanders, R. A. Sheetz, P. Staszel, T. S. Tveter, F. Videbæk, R. Wada, Z. Yin, I. S. Zgura

    Research output: Contribution to journalArticlepeer-review


    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.

    Original languageEnglish (US)
    Article number162301
    JournalPhysical Review Letters
    Issue number16
    StatePublished - Apr 29 2005

    ASJC Scopus subject areas

    • General Physics and Astronomy


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