Skewness of elliptic flow fluctuations
Abstract
Using event-by-event hydrodynamic calculations, we find that the fluctuations of the elliptic flow () in the reaction plane have a negative skew. We compare the skewness of fluctuations to that of initial eccentricity fluctuations. We show that skewness is the main effect lifting the degeneracy between higher-order cumulants, with negative skew corresponding to the hierarchy observed in Pb+Pb collisions at the LHC. We describe how the skewness can be measured experimentally and show that hydrodynamics naturally reproduces its magnitude and centrality dependence.
Keywords
Cite
@article{arxiv.1608.01823,
title = {Skewness of elliptic flow fluctuations},
author = {Giuliano Giacalone and Li Yan and Jacquelyn Noronha-Hostler and Jean-Yves Ollitrault},
journal= {arXiv preprint arXiv:1608.01823},
year = {2017}
}
Comments
7 pages, 6 figures. v2: We now use data from Fig.9b of arXiv:1408.4342 instead of using data from Fig.9a. v3: Published version. Overall revision of the text. Added discussion after Figure 6. Statistics of events is increased in central collisions