Particle-type dependence of azimuthal anisotropy and nuclear modification of particle production in Au + Au collisions at sqrt[sNN]=200 GeV

We present STAR measurements of the azimuthal anisotropy parameter v2 and the binary-collision scaled centrality ratio RCP for kaons and lambdas ( Lambda + Lambda -bar) at midrapidity in Au+Au collisions at sqrt[sNN]=200
We present STAR measurements of the azimuthal anisotropy parameter v2 and the binary-collision scaled centrality ratio RCP for kaons and lambdas ( Lambda + Lambda -bar) at midrapidity in Au+Au collisions at sqrt[sNN]=200 GeV. In combination, the v2 and RCP particle-type dependencies contradict expectations from partonic energy loss followed by standard fragmentation in vacuum. We establish pT ~ 5 GeV/c as the value where the centrality dependent baryon enhancement ends. The K0S and Lambda + Lambda -bar v2 values are consistent with expectations of constituent-quark-number scaling from models of hadron formation by parton coalescence or recombination.
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Metadaten
Author:J. Adams, Clemens Adler, Jens Berger, Thomas Dietel, Dominik Bernhard Flierl, Thorsten Kollegger, Jens Sören Lange, Reinhard Stock, Christof Struck, et al., STAR Collaboration
URN:urn:nbn:de:hebis:30-18972
Document Type:Article
Language:English
Date of Publication (online):2005/10/14
Year of first Publication:2004
Publishing Institution:Univ.-Bibliothek Frankfurt am Main
Release Date:2005/10/14
Source:Phys. Rev. Lett. 92, 052302 (2004), ©2004 The American Physical Society, http://link.aps.org/abstract/PRL/v92/e052302
HeBIS PPN:191763039
Institutes:Physik
Dewey Decimal Classification:530 Physik
PACS-Classification:25.75.Dw Particle and resonance production
25.75.Ld Collective flow
Sammlungen:Universitätspublikationen
Licence (German):License Logo Veröffentlichungsvertrag für Publikationen

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