Intermittency analysis in relativistic heavy-ion collisions

TL;DR

This paper investigates local density fluctuations near the QCD critical point in relativistic heavy-ion collisions by analyzing scaled factorial moments, proposing new methods for background removal and efficiency correction.

Contribution

It introduces a cumulative variable method for background subtraction and a cell-by-cell approach for efficiency correction in intermittency analysis.

Findings

Demonstrates the effectiveness of the proposed methods in UrQMD model simulations.

Provides insights into density fluctuations near the QCD critical point.

Enhances the reliability of intermittency analysis in heavy-ion collision experiments.

Abstract

Local density fluctuations near the QCD critical point can be probed by an intermittency analysis of power-law behavior on scaled factorial moments in relativistic heavy-ion collisions. We study the second-order scaled factorial moment in Au + Au collisions at $\sqrt{s_\mathrm{NN}}$ = 7.7-200 GeV from the UrQMD model. Since the background subtraction and efficiency correction are two important aspects in this measurement, we propose a cumulative variable method to remove background contribution and a cell-by-cell method for efficiency correction in the intermittency analysis.