Centrality dependence of identified particle elliptic flow in relativistic heavy ion collisions at sNN =7.7-62.4 GeV

STAR Collaboration

doi:10.1103/PhysRevC.93.014907

Centrality dependence of identified particle elliptic flow in relativistic heavy ion collisions at sNN =7.7-62.4 GeV

STAR Collaboration

Physics and Astronomy

AGH University of Krakow
University of Kentucky
Joint Institute for Nuclear Research
Panjab University
Variable Energy Cyclotron Centre India
Alikhanov Institute for Theoretical and Experimental Physics
Brookhaven National Laboratory
University of Illinois at Chicago
National Institute of Science Education and Research
University of Houston
University of Jammu
University of Texas at Austin
Czech Technical University in Prague
Czech Academy of Sciences
Kent State University
Rice University
Moscow Engineering Physics Institute
Yale University
University of California at Davis
Ohio State University
Texas A&M University
CAS - Institute of Modern Physics
Chinese Academy of Sciences
Tsinghua University
Creighton University
University of California at Los Angeles
Lawrence Berkeley National Laboratory
University of California at Berkeley
Institute of Physics Bhubaneswar
Shandong University
Institute for High Energy Physics

Research output: Contribution to journal › Article › peer-review

88 Scopus citations

Abstract

Elliptic flow (v2) values for identified particles at midrapidity in Au + Au collisions measured by the STAR experiment in the Beam Energy Scan at the Relativistic Heavy Ion Collider at sNN=7.7-62.4 GeV are presented for three centrality classes. The centrality dependence and the data at sNN=14.5 GeV are new. Except at the lowest beam energies, we observe a similar relative v2 baryon-meson splitting for all centrality classes which is in agreement within 15% with the number-of-constituent quark scaling. The larger v2 for most particles relative to antiparticles, already observed for minimum bias collisions, shows a clear centrality dependence, with the largest difference for the most central collisions. Also, the results are compared with a multiphase transport (AMPT) model and fit with a blast wave model.

Original language	English
Article number	014907
Journal	Physical Review C
Volume	93
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevC.93.014907
State	Published - Jan 19 2016

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10.1103/PhysRevC.93.014907

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@article{5cd563b189f34f558e3e97e6278dd69a,

title = "Centrality dependence of identified particle elliptic flow in relativistic heavy ion collisions at sNN =7.7-62.4 GeV",

abstract = "Elliptic flow (v2) values for identified particles at midrapidity in Au + Au collisions measured by the STAR experiment in the Beam Energy Scan at the Relativistic Heavy Ion Collider at sNN=7.7-62.4 GeV are presented for three centrality classes. The centrality dependence and the data at sNN=14.5 GeV are new. Except at the lowest beam energies, we observe a similar relative v2 baryon-meson splitting for all centrality classes which is in agreement within 15\% with the number-of-constituent quark scaling. The larger v2 for most particles relative to antiparticles, already observed for minimum bias collisions, shows a clear centrality dependence, with the largest difference for the most central collisions. Also, the results are compared with a multiphase transport (AMPT) model and fit with a blast wave model.",

author = "\{STAR Collaboration\} and L. Adamczyk and Adkins, \{J. K.\} and G. Agakishiev and Aggarwal, \{M. M.\} and Z. Ahammed and I. Alekseev and A. Aparin and D. Arkhipkin and Aschenauer, \{E. C.\} and Averichev, \{G. S.\} and X. Bai and V. Bairathi and A. Banerjee and R. Bellwied and A. Bhasin and Bhati, \{A. K.\} and P. Bhattarai and J. Bielcik and J. Bielcikova and Bland, \{L. C.\} and Bordyuzhin, \{I. G.\} and J. Bouchet and D. Brandenburg and Brandin, \{A. V.\} and I. Bunzarov and J. Butterworth and H. Caines and \{Calder{\'o}n De La Barca S{\'a}nchez\}, M. and Campbell, \{J. M.\} and D. Cebra and Cervantes, \{M. C.\} and I. Chakaberia and P. Chaloupka and Z. Chang and S. Chattopadhyay and X. Chen and Chen, \{J. H.\} and J. Cheng and M. Cherney and O. Chisman and W. Christie and G. Contin and Crawford, \{H. J.\} and S. Das and \{De Silva\}, \{L. C.\} and Debbe, \{R. R.\} and Dedovich, \{T. G.\} and J. Deng and Derevschikov, \{A. A.\} and R. Esha",

note = "Publisher Copyright: {\textcopyright} 2016 American Physical Society.",

year = "2016",

month = jan,

day = "19",

doi = "10.1103/PhysRevC.93.014907",

language = "English",

volume = "93",

journal = "Physical Review C",

issn = "2469-9985",

number = "1",

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TY - JOUR

T1 - Centrality dependence of identified particle elliptic flow in relativistic heavy ion collisions at sNN =7.7-62.4 GeV

AU - STAR Collaboration

AU - Adamczyk, L.

AU - Adkins, J. K.

AU - Agakishiev, G.

AU - Aggarwal, M. M.

AU - Ahammed, Z.

AU - Alekseev, I.

AU - Aparin, A.

AU - Arkhipkin, D.

AU - Aschenauer, E. C.

AU - Averichev, G. S.

AU - Bai, X.

AU - Bairathi, V.

AU - Banerjee, A.

AU - Bellwied, R.

AU - Bhasin, A.

AU - Bhati, A. K.

AU - Bhattarai, P.

AU - Bielcik, J.

AU - Bielcikova, J.

AU - Bland, L. C.

AU - Bordyuzhin, I. G.

AU - Bouchet, J.

AU - Brandenburg, D.

AU - Brandin, A. V.

AU - Bunzarov, I.

AU - Butterworth, J.

AU - Caines, H.

AU - Calderón De La Barca Sánchez, M.

AU - Campbell, J. M.

AU - Cebra, D.

AU - Cervantes, M. C.

AU - Chakaberia, I.

AU - Chaloupka, P.

AU - Chang, Z.

AU - Chattopadhyay, S.

AU - Chen, X.

AU - Chen, J. H.

AU - Cheng, J.

AU - Cherney, M.

AU - Chisman, O.

AU - Christie, W.

AU - Contin, G.

AU - Crawford, H. J.

AU - Das, S.

AU - De Silva, L. C.

AU - Debbe, R. R.

AU - Dedovich, T. G.

AU - Deng, J.

AU - Derevschikov, A. A.

AU - Esha, R.

PY - 2016/1/19

Y1 - 2016/1/19

N2 - Elliptic flow (v2) values for identified particles at midrapidity in Au + Au collisions measured by the STAR experiment in the Beam Energy Scan at the Relativistic Heavy Ion Collider at sNN=7.7-62.4 GeV are presented for three centrality classes. The centrality dependence and the data at sNN=14.5 GeV are new. Except at the lowest beam energies, we observe a similar relative v2 baryon-meson splitting for all centrality classes which is in agreement within 15% with the number-of-constituent quark scaling. The larger v2 for most particles relative to antiparticles, already observed for minimum bias collisions, shows a clear centrality dependence, with the largest difference for the most central collisions. Also, the results are compared with a multiphase transport (AMPT) model and fit with a blast wave model.

AB - Elliptic flow (v2) values for identified particles at midrapidity in Au + Au collisions measured by the STAR experiment in the Beam Energy Scan at the Relativistic Heavy Ion Collider at sNN=7.7-62.4 GeV are presented for three centrality classes. The centrality dependence and the data at sNN=14.5 GeV are new. Except at the lowest beam energies, we observe a similar relative v2 baryon-meson splitting for all centrality classes which is in agreement within 15% with the number-of-constituent quark scaling. The larger v2 for most particles relative to antiparticles, already observed for minimum bias collisions, shows a clear centrality dependence, with the largest difference for the most central collisions. Also, the results are compared with a multiphase transport (AMPT) model and fit with a blast wave model.

UR - https://www.scopus.com/pages/publications/84955601541

U2 - 10.1103/PhysRevC.93.014907

DO - 10.1103/PhysRevC.93.014907

M3 - Article

AN - SCOPUS:84955601541

SN - 2469-9985

VL - 93

JO - Physical Review C

JF - Physical Review C

IS - 1

M1 - 014907

ER -

Centrality dependence of identified particle elliptic flow in relativistic heavy ion collisions at sNN =7.7-62.4 GeV

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