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Skewness of elliptic flow fluctuations
2017
Physical Review C
Using event-by-event hydrodynamic calculations, we find that the fluctuations of the elliptic flow (v_2) in the reaction plane have a negative skew. We compare the skewness of v_2 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 v_2{4}>v_2{6} observed in Pb+Pb collisions at the LHC. We describe how the skewness can be measured experimentally
doi:10.1103/physrevc.95.014913
fatcat:t25bg2uggzczxn26fz4funeiye