Eccentricity fluctuations and elliptic flow at RHIC

Details Eccentricity fluctuations and elliptic flow at RHIC Eccentricity fluctuations and elliptic flow at RHIC

2006-07-07

arxiv.org/abs/nucl-th/0607009v2

Phys.Lett.B641:260-264,2006

Physics

Nuclear Physics

Nuclear Theory

5 pages, 3 eps figures

Scientific paper

10.1016/j.physletb.2006.08.055

Fluctuations in nucleon positions can affect the spatial eccentricity of the overlap zone in nucleus-nucleus collisions. We show that elliptic flow should be scaled by different eccentricities depending on which method is used for the flow analysis. These eccentricities are estimated semi-analytically. When $v_2$ is analyzed from 4-particle cumulants, or using the event plane from directed flow in a zero-degree calorimeter, the result is shown to be insensitive to eccentricity fluctuations.

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