Detection of source inhomogeneity through event-by-event two-pion Bose-Einstein correlations

TL;DR

This paper proposes a new method to detect inhomogeneity in pion-emitting sources in heavy ion collisions using event-by-event two-pion Bose-Einstein correlations, which could be applied in future LHC experiments.

Contribution

The paper introduces a novel observable based on weighted fluctuations of correlation functions to identify source inhomogeneity in heavy ion collisions.

Findings

Root-mean-square of fluctuations can indicate source inhomogeneity.

Method is applicable across different impact parameter regions.

Potential for implementation in upcoming LHC heavy ion experiments.

Abstract

We develop a method for detecting the inhomogeneity of the pion-emitting sources produced in ultra-relativistic heavy ion collisions, through event-by-event two-pion Bose-Einstein correlations. The root-mean-square of the error-inverse-weighted fluctuations between the two-pion correlation functions of single and mixed events are useful observables for the detection. By investigating the root-mean-square of the weighted fluctuations for different impact parameter regions people may hopefully determine the inhomogeneity of the particle-emitting in the coming Large Hadron Collider (LHC) heavy ion experiments.