Interpreting Near-side Correlations

TL;DR

This paper discusses the near-side correlations observed in heavy ion collisions at RHIC, proposing they could reveal properties of the Quark Gluon Plasma and emphasizing the importance of a beam-energy scan to understand their origin.

Contribution

It suggests that the centrality and energy dependence of near-side correlations can provide insights into the QGP phase boundary and the nuclear matter Equation of State.

Findings

Correlation strength increases with collision centrality

Abrupt onset of correlations at certain centralities

Beam-energy dependence can reveal QGP properties

Abstract

Recent data from heavy ion collisions at RHIC show strong near-side correlations extending over several units of rapidity. This ridge-like correlation exhibits an abrupt onset with collision centrality. In this talk, I argue that the centrality and beam-energy dependence of these near-angle correlations could provide access to information about the Quark Gluon Plasma phase boundary and the Equation of State of nuclear matter. A beam-energy-scan at RHIC will better reveal the true source of these correlations and should be a high priority at RHIC.