Correlation measurements between flow harmonics in Au+Au collisions at RHIC

J Adam , Deryk Anderson , Fu-Kuo Chang , Xin-Nan Chen , Xin-Nan Chen , J Cheng , Y. Guo , Shi Huang , Wei-Te Huang , Hong-Zhong HUANG , Daniel Kikoła , Adam Kisiel , Leszek Kosarzewski , SS. Kumar , W. Li , Fengwei Liu , Pengfei Liu , Mayer J. R. R. , Lin Ma , A. M. Mustafa Al Bakri , Bernd Page , Jan Pluta , Katarzyna Poniatowska , Joanna Porter-Sobieraj , J. Schambach , R Sikora , S. Tripathy , Barbara Trzeciak , Cheng-Zhong Xu , J. W. Xu , S. Yang , Wuqiang Q Yang , Hanna Zbroszczyk , Jian Zhang , Liren Zhang , Jian Zhang , Jian Zhang , J Zhao , X. Zhu

Abstract

Flow harmonics (vn) in the Fourier expansion of the azimuthal distribution of particles are widely used to quantify the anisotropy in particle emission in high-energy heavy-ion collisions. The symmetric cumulants, SC(m,n), are used to measure the correlations between different orders of flow harmonics. These correlations are used to constrain the initial conditions and the transport properties of the medium in theoretical models. In this Letter, we present the first measurements of the four-particle symmetric cumulants in Au+Au collisions at sNN=39 and 200 GeV from data collected by the STAR experiment at RHIC. We observe that v2 and v3 are anti-correlated in all centrality intervals with similar correlation strengths from 39 GeV Au+Au to 2.76 TeV Pb+Pb (measured by the ALICE experiment). The v2–v4 correlation seems to be stronger at 39 GeV than at higher collision energies. The initial-stage anti-correlations between second and third order eccentricities are sufficient to describe the measured correlations between v2 and v3. The best description of v2–v4 correlations at sNN=200GeV is obtained with inclusion of the system's nonlinear response to initial eccentricities accompanied by the viscous effect with η/s>0.08. Theoretical calculations using different initial conditions, equations of state and viscous coefficients need to be further explored to extract η/s of the medium created at RHIC.

Collective authorL. Adamczyk, J.R. Adams, J.K. Adkins, G. Agakishiev, M.M. Aggarwal, Z. Ahammed, N.N. Ajita.....
Author J Adam
J Adam,,
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, Deryk Anderson
Deryk Anderson ,,
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, Fu-Kuo Chang
Fu-Kuo Chang,,
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, Xin-Nan Chen
Xin-Nan Chen,,
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, Xin-Nan Chen
Xin-Nan Chen,,
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, J Cheng
J Cheng,,
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, Y. Guo
Y. Guo,,
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, Shi Huang
Shi Huang,,
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, Wei-Te Huang
Wei-Te Huang,,
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, Hong-Zhong HUANG
Hong-Zhong HUANG ,,
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et al.`
Total number of authors350
Journal seriesPhysics Letters B, ISSN 0370-2693, (A 35 pkt)
Issue year2018
Vol783
Pages459-465
Publication size in sheets0.5
ASJC Classification3106 Nuclear and High Energy Physics
DOIDOI:10.1016/j.physletb.2018.05.076
Languageen angielski
Score (nominal)40
ScoreMinisterial score = 35.0, 21-11-2018, ArticleFromJournal
Ministerial score (2013-2016) = 40.0, 21-11-2018, ArticleFromJournal
Publication indicators Scopus Citations = 0; Scopus SNIP (Source Normalised Impact per Paper): 2017 = 1.548; WoS Impact Factor: 2017 = 4.254 (2) - 2017=3.968 (5)
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