Nonflow "factorization" and a novel method to disentangle anisotropic   flow and nonflow
  Presently flow and nonflow cannot be separated experimentally. Using Pythia simulations of p+p collisions we show that nonflow approximately factorizes. This fact may be used to disentangle flow and nonflow in heavy ion data by performing a two-component factorization fit to Fourier coefficients of two-particle correlations. 
Daniel Kikola, Li Yi, ShinIchi Esumi, Fuqiang Wang, Wei Xie
nucl-ex