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Isolation of flow and nonflow correlations by two- and four-particle cumulant measurements of azimuthal harmonics in root s(NN)=200 GeV Au+Au collisions

SYSNO ASEP	0444575
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Isolation of flow and nonflow correlations by two- and four-particle cumulant measurements of azimuthal harmonics in root s(NN)=200 GeV Au+Au collisions
Author(s)	Abdelwahab, N. M. (US) Adamczyk, L. (PL) Bielčík, J. (CZ) Bielčíková, Jana (UJF-V)_{RID, ORCID, SAI} Chaloupka, P. (CZ) Rusňák, Jan (UJF-V)_{RID, ORCID, SAI} Rusňáková, O. (CZ) Šimko, M. (CZ) Šumbera, Michal (UJF-V)_{RID, ORCID, SAI} Tlustý, David (UJF-V) Trzeciak, B. A. (CZ) Vértési, Robert (UJF-V)
Number of authors	349
Source Title	Physics Letters. B. - : Elsevier - ISSN 0370-2693 Roč. 745, MAY (2015), s. 40-47
Number of pages	8 s.
Publication form	Print - P
Language	eng - English
Country	NL - Netherlands
Keywords	STAR collaboration ; heavy ion
Subject RIV	BG - Nuclear, Atomic and Molecular Physics, Colliders
R&D Projects	GA13-20841S GA ČR - Czech Science Foundation (CSF)
Institutional support	UJF-V - RVO:61389005
UT WOS	000353892300005
EID SCOPUS	84928320877
DOI	10.1016/j.physletb.2015.04.033
Annotation	A data-driven method was applied to Au+Au collisions at root S-NN = 200 GeV made with the STAR detector at RHIC to isolate pseudorapidity distance Delta eta-dependent and Delta eta-independent correlations by using two- and four-particle azimuthal cumulant measurements. We identified a Delta eta-independent component of the correlation, which is dominated by anisotropic flow and flow fluctuations. It was also found to be independent of. within the measured range of pseudorapidity vertical bar eta vertical bar < 1. In 20-30% central Au+Au collisions, the relative flow fluctuation was found to be 34% +/- 2%(stat.) +/- 3%(sys.) for particles with transverse momentum p(T) less than 2 GeV/c. The Delta eta-dependent part, attributed to nonflow correlations, is found to be 5% +/- 2%(sys.) relative to the flow of the measured second harmonic cumulant at vertical bar Delta eta vertical bar > 0.7.
Workplace	Nuclear Physics Institute
Contact	Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228
Year of Publishing	2016

Number of the records: 1