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Azimuthal anisotropy in Cu plus Au collisions at root s(NN)=200 GeV
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SYSNO ASEP 0492102 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Azimuthal anisotropy in Cu plus Au collisions at root s(NN)=200 GeV Author(s) Adamczyk, L. (PL)
Adams, J. R. (US)
Adkins, J. K. (US)
Agakishiev, G. (RU)
Aggarwal, M. M. (IN)
Bielčík, J. (CZ)
Bielčíková, Jana (UJF-V) RID, ORCID, SAI
Chaloupka, P. (CZ)
Federič, Pavol (UJF-V) ORCID, SAI
Federičová, P. (CZ)
Harlenderová, A. (CZ)
Kocmánek, Martin (UJF-V)
Kvapil, J. (CZ)
Lidrych, J. (CZ)
Rusňák, Jan (UJF-V) RID, ORCID, SAI
Rusňáková, O. (CZ)
Šaur, Miroslav (UJF-V)
Šimko, Miroslav (UJF-V) ORCID, SAI
Šumbera, Michal (UJF-V) RID, ORCID, SAI
Trzeciak, B. A. (CZ)Number of authors 347 Article number 014915 Source Title Physical Review C. - : American Physical Society - ISSN 2469-9985
Roč. 98, č. 1 (2018)Number of pages 22 s. Publication form Print - P Language eng - English Country US - United States Keywords STAR ; heavy ion collisions ; energy Subject RIV BG - Nuclear, Atomic and Molecular Physics, Colliders OECD category Nuclear physics R&D Projects EF16_013/0001569 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support UJF-V - RVO:61389005 UT WOS 000440384600004 EID SCOPUS 85051845146 DOI 10.1103/PhysRevC.98.014915 Annotation The azimuthal anisotropic flow of identified and unidentified charged particles has been systematically studied in Cu+Au collisions at root s(NN) = 200 GeV for harmonics n = 1-4 in the pseudorapidity range vertical bar eta vertical bar < 1. The directed flow in Cu+Au collisions is compared with the rapidity-odd and, for the first time, the rapidity-even components of charged particle directed flow in Au+Au collisions at root s(NN) = 200 GeV. The slope of the directed flow pseudorapidity dependence in Cu+Au collisions is found to be similar to that in Au+Au collisions, with the intercept shifted toward positive pseudorapidity values, i.e., the Cu-going direction. The mean transverse momentum projected onto the spectator plane p(x) in Cu+Au collision also exhibits approximately linear dependence on pseudorapidity with the intercept at about eta approximate to -0.4 (shifted from zero in the Au-going direction), closer to the rapidity of the Cu+Au system center of mass. The observed dependencies find a natural explanation in a picture of the directed flow originating partly due the 'tilted source' and partly due to the asymmetry in the initial density distribution. A charge dependence of p(x) was also observed in Cu+Au collisions, consistent with an effect of the initial electric field created by charge difference of the spectator protons in two colliding nuclei. The rapidity-even component of directed flow in Au+Au collisions is close to that in Pb+Pb collisions at root s(NN) = 2.76 TeV, indicating a similar magnitude of dipolelike fluctuations in the initial-state density distribution. Higher harmonic flow in Cu+Au collisions exhibits similar trends to those observed in Au+Au and Pb+Pb collisions and is qualitatively reproduced by a viscous hydrodynamic model and a multiphase transport model. For all harmonics with n >= 2 we observe an approximate scaling of v(n) with the number of constituent quarks, this scaling works as well in Cu+Au collisions as it does in Au+Au collisions. Workplace Nuclear Physics Institute Contact Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228 Year of Publishing 2019
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