Reaction Plane and Beam Energy Dependence Of The Balance Function at RHIC

TL;DR

This paper investigates how the balance function, which measures charge correlations, varies with reaction plane and beam energy in RHIC collisions, providing insights into charge creation and collective particle behavior.

Contribution

It presents a reaction-plane-dependent balance function analysis at RHIC energies and compares it with recent three-particle correlation results, extending understanding of charge dynamics.

Findings

Balance functions vary with reaction plane orientation.

Results show energy dependence of charge correlations.

Comparison with three-particle correlations enhances interpretation.

Abstract

The balance function, which measures the correlation between opposite sign charge pairs, is sensitive to the mechanisms of charge formation and the subsequent relative diffusion of the balancing charges. The study of the balance function can provide information about charge creation time as well as the subsequent collective behavior of particles. In this paper, we present a reaction-plane-dependent balance function study for Au+Au collisions at $\sqrt{s_{\rm NN}}$ = 200 GeV and compare with results from recent three particle correlation measurements. We also report balance functions for relative pseudorapidity ($\Delta \eta$), relative rapidity ($\Delta y$), and relative azimuthal angle ($\Delta \phi$) from the recent RHIC beam energy scan data.