Further results on peripheral-tube model for ridge correlation
  Peripheral one-tube model has shown to be a nice tool for dynamically understanding several aspects of ridge structures in long-range two-particle correlations, observed experimentally and obtained also in our model calculations using NexSPheRIO code. Here, we study an extension of the model, to initial configurations with several peripheral tubes distributed randomly in azimuth. We show that the two-particle correlation is almost independent of the number of tubes, although the flow distribution becomes indeed strongly event dependent. In our picture, the ridge structures are causally connected not only in the longitudinal direction but also in azimuth. 
Yogiro Hama, Rone P. G. Andrade, Frederique Grassi, Jorge Noronha and   Wei-Liang Qian
hep-ph nucl-th