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26 April 2024

» pubmed » pmid15904216

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Charged meson rapidity distributions in central Au+Au collisions at square root(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 Jundt ; J 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 P?aneta ; F Rami ; C Ristea ; D Röhrich ; B H Samset ; D Sandberg ; S J Sanders ; R A Sheetz ; P Staszel ; T S Tveter ; F Videaek ; R Wada ; Z Yin ; I S Zgura ; ;
Date:	29 Apr 2005
Journal:	Phys Rev Lett, 94 (16), 162301
Abstract:	We have measured rapidity densities dN/dy of pi+/- and K+/- over a broad rapidity range (-0.1 < y < 3.5) for central Au + Au collisions at square root(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 (pi+), 1683 +/- 16 +/- 135 (pi-), 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.
Source:	PubMed, pmid15904216
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