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

Physics

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573 Scopus citations

Abstract

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.

Original language	English (US)
Article number	052302
Pages (from-to)	523021-523026
Number of pages	6
Journal	Physical Review Letters
Volume	92
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevLett.92.052302
State	Published - Feb 6 2004

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

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10.1103/PhysRevLett.92.052302

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@article{64a59c3b15b440f1bf55981f2e438cd4,

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 = "\{STAR Collaboration\} and J. Adams and C. Adler and Aggarwal, \{M. M.\} and Z. Ahammed and J. Amonett and Anderson, \{B. D.\} and M. Anderson and D. Arkhipkin and Averichev, \{G. S.\} and Badyal, \{S. K.\} and J. Balewski and O. Barannikova and Barnby, \{L. S.\} and J. Baudot and S. Bekele and Belaga, \{V. V.\} and R. Bellwied and J. Berger and Bezverkhny, \{B. I.\} and S. Bhardwaj and P. Bhaskar and Bhati, \{A. K.\} and H. Bichsel and A. Billmeier and Bland, \{L. C.\} and Blyth, \{C. O.\} and Bonner, \{B. E.\} and M. Botje and A. Boucham and A. Brandin and A. Bravar and Cadman, \{R. V.\} and Cai, \{X. Z.\} and H. Caines and \{Calder{\'o}n De La Barca S{\'a}nchez\}, M. and J. Carroll and J. Castillo and M. Castro and D. Cebra and P. Chaloupka and S. Chattopadhyay and Chen, \{H. F.\} and Y. Chen and Chernenko, \{S. P.\} and M. Cherney and A. Chikanian and B. Choi and W. Christie and Coffin, \{J. P.\} and S. Heppelmann",

year = "2004",

month = feb,

day = "6",

doi = "10.1103/PhysRevLett.92.052302",

language = "English (US)",

volume = "92",

pages = "523021--523026",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "5",

}

TY - JOUR

T1 - Particle-Type Dependence of Azimuthal Anisotropy and Nuclear Modification of Particle Production in Au + Au Collisions at √SNN= 200 GeV

AU - STAR Collaboration

AU - Adams, J.

AU - Adler, C.

AU - Aggarwal, M. M.

AU - Ahammed, Z.

AU - Amonett, J.

AU - Anderson, B. D.

AU - Anderson, M.

AU - Arkhipkin, D.

AU - Averichev, G. S.

AU - Badyal, S. K.

AU - Balewski, J.

AU - Barannikova, O.

AU - Barnby, L. S.

AU - Baudot, J.

AU - Bekele, S.

AU - Belaga, V. V.

AU - Bellwied, R.

AU - Berger, J.

AU - Bezverkhny, B. I.

AU - Bhardwaj, S.

AU - Bhaskar, P.

AU - Bhati, A. K.

AU - Bichsel, H.

AU - Billmeier, A.

AU - Bland, L. C.

AU - Blyth, C. O.

AU - Bonner, B. E.

AU - Botje, M.

AU - Boucham, A.

AU - Brandin, A.

AU - Bravar, A.

AU - Cadman, R. V.

AU - Cai, X. Z.

AU - Caines, H.

AU - Calderón De La Barca Sánchez, M.

AU - Carroll, J.

AU - Castillo, J.

AU - Castro, M.

AU - Cebra, D.

AU - Chaloupka, P.

AU - Chattopadhyay, S.

AU - Chen, H. F.

AU - Chen, Y.

AU - Chernenko, S. P.

AU - Cherney, M.

AU - Chikanian, A.

AU - Choi, B.

AU - Christie, W.

AU - Coffin, J. P.

AU - Heppelmann, S.

PY - 2004/2/6

Y1 - 2004/2/6

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.

UR - https://www.scopus.com/pages/publications/3843147624

UR - https://www.scopus.com/pages/publications/3843147624#tab=citedBy

U2 - 10.1103/PhysRevLett.92.052302

DO - 10.1103/PhysRevLett.92.052302

M3 - Article

SN - 0031-9007

VL - 92

SP - 523021

EP - 523026

JO - Physical Review Letters

JF - Physical Review Letters

IS - 5

M1 - 052302

ER -

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

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