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Eccentricity fluctuations and elliptic flow at RHIC
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Eccentricity fluctuations and elliptic flow at RHIC
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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.
Forward citations
Cited by 3 Pith papers
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Thermal and geometric normal modes of spectral fluctuations in heavy-ion collisions
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Thermal and geometric normal modes of spectral fluctuations in heavy-ion collisions
Rotated PCA of simulated Pb+Pb spectra separates spectral fluctuations into a coherent thermal mode that fully explains v0(pT) and a double-node geometric mode that drives the low-pT sign change of v02(pT).
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Scaling approach to rigid and soft nuclear deformation through flow fluctuations in high-energy nuclear collisions
Triangular flow four-particle cumulants scale linearly with the fourth moment of octupole deformation, allowing the mean and variance of 238U octupole deformation to be extracted separately.
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