On the Origin of the Trigger-Angle Dependence of the Ridge Structure
  The origin of the trigger-angle dependence of the ridge structure in two-hadron long-range correlations, as observed at RHIC, is discussed as due to an interplay between the elliptic flow caused by the initial state global geometry and flow produced by fluctuations. 
Yogiro Hama (1), Rone P.G. Andrade (1), Frederique Grassi (1) and   Wei-Liang Qian (2) ((1) Instituto de Fisica, Universidad...
hep-ph nucl-th