Artículos de revistas
Isolation Of Flow And Nonflow Correlations By Two- And Four-particle Cumulant Measurements Of Azimuthal Harmonics In Snn=200gev Au+au Collisions
Registro en:
Physics Letters, Section B: Nuclear, Elementary Particle And High-energy Physics. Elsevier, v. 745, p. 40 - 47, 2015.
3702693
10.1016/j.physletb.2015.04.033
2-s2.0-84928320877
Institución
Resumen
A data-driven method was applied to Au+Au collisions at sNN=200GeV made with the STAR detector at RHIC to isolate pseudorapidity distance δη-dependent and δη-independent correlations by using two- and four-particle azimuthal cumulant measurements. We identified a δη-independent component of the correlation, which is dominated by anisotropic flow and flow fluctuations. It was also found to be independent of η within the measured range of pseudorapidity |η|<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<inf>T</inf> less than 2 GeV/c. The δη-dependent part, attributed to nonflow correlations, is found to be 5%±2%(sys.) relative to the flow of the measured second harmonic cumulant at |δη|>0.7. © 2015 The Authors. 745
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