Exposing the noncollectivity in elliptic flow.
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.
Liao
Jinfeng
J
Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA. jliao@lbl.gov
Koch
Volker
V