# The Rise and Fall of the Ridge in Heavy Ion Collisions

Authors
Type
Preprint
Publication Date
Apr 06, 2011
Submission Date
Feb 07, 2011
Identifiers
DOI: 10.1016/j.physletb.2011.09.055
Source
arXiv
License
Yellow
External links

## Abstract

Recent data from heavy ion collisions at RHIC show unexpectedly large near-angle correlations that broaden longitudinally with increasing centrality. The amplitude of this ridge-like correlation rises rapidly, reaches a maximum, and then falls in the most central collisions. In this letter we explain how this behavior can be explained as initial-state coordinate-space anisotropies converted into final-state momentum-space correlations. We propose $v_n^2/\epsilon_{n,\mathrm{part}}^{2}$ as a useful way to study length scales and provide a prediction for the ridge in Pb+Pb collisions at $\sqrt{s_{\mathrm{NN}}}=$ 2.76 TeV.

Seen <100 times