Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

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

Journal Article · · Physics Letters B
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; more »; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; « less
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. (C) 2015 The Authors. Published by Elsevier B.V.
Research Organization:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26); USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
DOE Contract Number:
AC02-06CH11357
OSTI ID:
1342904
Journal Information:
Physics Letters B, Journal Name: Physics Letters B Journal Issue: C Vol. 745; ISSN 0370-2693
Publisher:
Elsevier
Country of Publication:
United States
Language:
English

References (26)

Distributions of Charged Hadrons Associated with High Transverse Momentum Particles in p p and Au + Au Collisions at s N N = 200     GeV journal October 2005
Longitudinal correlation of the triangular flow event plane in a hybrid approach with hadron and parton cascade initial conditions journal November 2011
Flow analysis from multiparticle azimuthal correlations journal September 2001
Methods for analyzing anisotropic flow in relativistic nuclear collisions journal September 1998
Is the analysis of flow at the CERN Super Proton Synchrotron reliable? journal August 2000
hijing: A Monte Carlo model for multiple jet production in pp , pA , and AA collisions journal December 1991
200 A GeV Au + Au Collisions Serve a Nearly Perfect Quark-Gluon Liquid journal May 2011
Flow study in relativistic nuclear collisions by Fourier expansion of azimuthal particle distributions journal May 1996
Event-plane decorrelation over pseudorapidity and its effect on azimuthal anisotropy measurements in relativistic heavy-ion collisions journal January 2013
Viscosity in Strongly Interacting Quantum Field Theories from Black Hole Physics journal March 2005
Torqued fireballs in relativistic heavy-ion collisions journal March 2011
Effect of flow fluctuations and nonflow on elliptic flow methods journal July 2009
Isolation of Flow and Nonflow by Two- and Multi-Particle Cumulant Measurements of vn in sNN=200 GeV Au + Au Collisions by STAR journal May 2013
New method for measuring azimuthal distributions in nucleus-nucleus collisions journal April 2001
Event-plane-dependent dihadron correlations with harmonic v n subtraction in Au + Au collisions at s NN = 200 GeV journal April 2014
Flow analysis with cumulants: Direct calculations journal April 2011
Energy and system-size dependence of two- and four-particle v 2 measurements in heavy-ion collisions at s N N = 62.4 and 200 GeV and their implications on flow fluctuations and nonflow journal July 2012
Anisotropy as a signature of transverse collective flow journal July 1992
Measurement of collective flow in heavy-ion collisions using particle-pair correlations journal September 1991
Systematic measurements of identified particle spectra in pp , d + Au , and Au + Au collisions at the STAR detector journal March 2009
Non-flow correlations and elliptic flow fluctuations in Au + Au collisions at s NN = 200 GeV journal March 2010
The STAR Time Projection Chamber journal December 1999
Decomposition of flow and nonflow in relativistic heavy-ion collisions journal August 2012
Centrality dependence of charged hadron and strange hadron elliptic flow from s NN = 200 GeV Au+Au collisions journal May 2008
System Size, Energy, Pseudorapidity, and Centrality Dependence of Elliptic Flow journal June 2007
Azimuthal anisotropy in Au+Au collisions at s NN = 200 GeV journal July 2005

Cited By (5)



Similar Records

Centrality evolution of the charged-particle pseudorapidity density over a broad pseudorapidity range in Pb–Pb collisions at sNN=2.76 TeV
Journal Article · Mon Jan 25 23:00:00 EST 2016 · Physics Letters. B · OSTI ID:1343517

Measurement of D*±, D± and Ds± meson production cross sections in pp collisions at s=7 TeV with the ATLAS detector
Journal Article · Wed Jun 01 00:00:00 EDT 2016 · Nuclear Physics. B · OSTI ID:1271954