Universal parameterization of initial-state fluctuations and its   applications to event-by-event anisotropy
  We propose Elliptic Power and Power parameterizations for the probability distribution of initial state anisotropies in heavy-ion collisions. By assuming a linear eccentricity scaling, the new parameterizations can also be applied to fluctuations of harmonic flow. In particular, we analyze flow multi-particle cumulants and event-by-event distributions, both of which are recently measured at the LHC. 
Li Yan, Jean-Yves Ollitrault and Art M. Poskanzer
nucl-th hep-ph nucl-ex