title: Exposing the noncollectivity in elliptic flow.
abstract: We show that backward-forward elliptic anisotropy correlation provides an experimentally accessible observable which distinguishes between collective and noncollective contributions to the observed elliptic anisotropy v_{2} in relativistic heavy ion collisions. The measurement of this observable will reveal the momentum scale at which collective expansion seizes and where the elliptic anisotropy is dominated by (semi)hard processes.
authors: Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA. jliao@lbl.gov
authors: Jinfeng
authors: J
authors: Liao
authors: Volker
authors: V
authors: Koch