Particle-Type Dependence of Azimuthal Anisotropy and Nuclear Modification of Particle Production in Au + Au Collisions at √SNN= 200 GeV

STAR Collaboration

doi:10.1103/PhysRevLett.92.052302

Particle-Type Dependence of Azimuthal Anisotropy and Nuclear Modification of Particle Production in Au + Au Collisions at √S_NN= 200 GeV

STAR Collaboration

University of Birmingham
Goethe University Frankfurt
Panjab University
Variable Energy Cyclotron Centre
Yale University
Brookhaven National Laboratory
Kent State University
University of California at Davis
Joint Institute for Nuclear Research
University of Jammu
Indiana University Bloomington
Purdue University
Institut de Recherches Subatomiques
Ohio State University
Wayne State University
University of Rajasthan
University of Washington
Rice University
National Institute for Subatomic Physics
SUBATECH
Moscow Engineering Physics Institute
Argonne National Laboratory
Academia Sinica - Shanghai Institute of Nuclear Research
Lawrence Berkeley National Laboratory
Czech Academy of Sciences
University of Science and Technology of China
University of California at Los Angeles
Creighton University
University of Texas at Austin
University of California at Berkeley
Institute for High Energy Physics
Institute of Physics
Max Planck Institute for Physics (Werner Heisenberg Institute)
Central China Normal University
Texas A&M University
Valparaiso University
Pennsylvania State University
Warsaw University of Technology
Carnegie Mellon University
City University of New York
Universidade de São Paulo
University of Zagreb
Michigan State University

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578 Citas (Scopus)

Resumen

We present STAR measurements of the azimuthal anisotropy parameter ν₂ and the binary-collision scaled centrality ratio R_CP for kaons and lambdas (Λ + Λ) at midrapidity in Au + Au collisions at √s_NN = 200 GeV. In combination, the ν₂ and R_CP particle-type dependencies contradict expectations from partonic energy loss followed by standard fragmentation in vacuum We establish p_T ≈ 5 GeV/c as the value where the centrality dependent baryon enhancement ends. The K0 and Λ + Λ¯ ν₂ values are consistent with expectations of constituent-quark-number scaling from models of hadron formation by parton coalescence or recombination.

Idioma original	Inglés
Número de artículo	052302
Páginas (desde-hasta)	523021-523026
Número de páginas	6
Publicación	Physical Review Letters
Volumen	92
N.º	5
DOI	https://doi.org/10.1103/PhysRevLett.92.052302
Estado	Publicada - 6 feb 2004
Publicado de forma externa	Sí

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10.1103/PhysRevLett.92.052302

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title = "Particle-Type Dependence of Azimuthal Anisotropy and Nuclear Modification of Particle Production in Au + Au Collisions at √SNN= 200 GeV",

abstract = "We present STAR measurements of the azimuthal anisotropy parameter ν2 and the binary-collision scaled centrality ratio RCP for kaons and lambdas (Λ + Λ) at midrapidity in Au + Au collisions at √sNN = 200 GeV. In combination, the ν2 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 K0 and Λ + Λ¯ ν2 values are consistent with expectations of constituent-quark-number scaling from models of hadron formation by parton coalescence or recombination.",

author = "J. Adams and C. Adler and Aggarwal, \{M. M.\} and Z. Ahammed and S. Kabana and \{STAR Collaboration\}",

note = "Publisher Copyright: {\textcopyright} 2004 The American Physical Society.",

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AU - Adams, J.

AU - Adler, C.

AU - Aggarwal, M. M.

AU - Ahammed, Z.

AU - Kabana, S.

AU - STAR Collaboration

PY - 2004/2/6

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N2 - We present STAR measurements of the azimuthal anisotropy parameter ν2 and the binary-collision scaled centrality ratio RCP for kaons and lambdas (Λ + Λ) at midrapidity in Au + Au collisions at √sNN = 200 GeV. In combination, the ν2 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 K0 and Λ + Λ¯ ν2 values are consistent with expectations of constituent-quark-number scaling from models of hadron formation by parton coalescence or recombination.

AB - We present STAR measurements of the azimuthal anisotropy parameter ν2 and the binary-collision scaled centrality ratio RCP for kaons and lambdas (Λ + Λ) at midrapidity in Au + Au collisions at √sNN = 200 GeV. In combination, the ν2 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 K0 and Λ + Λ¯ ν2 values are consistent with expectations of constituent-quark-number scaling from models of hadron formation by parton coalescence or recombination.

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