The $\Lambda\Lambda$ Correlation Function in Au+Au collisions at $\sqrt{s_{NN}}=$ 200 GeV

TL;DR

This paper reports on measurements of Lambda-Lambda correlations in gold-gold collisions at high energy, using the STAR detector, to extract source size and interaction parameters relevant for di-hyperon research.

Contribution

The study applies the Lednicky-Lyuboshitz model to experimental data to determine source size and interaction parameters in heavy-ion collisions at RHIC.

Findings

Determined source size of the Lambda-Lambda emission region.

Extracted scattering length and effective range for Lambda-Lambda interactions.

Discussed implications for di-hyperon searches in heavy-ion collisions.

Abstract

We present $\Lambda\Lambda$ correlation measurements in heavy-ion collisions for Au+Au collisions at $\sqrt{s_{NN}}= 200$ GeV using the STAR experiment at the Relativistic Heavy-Ion Collider (RHIC). The Lednick\'{y}-Lyuboshitz analytical model has been used to fit the data to obtain a source size, a scattering length and an effective range. Implications of the measurement of the $\Lambda\Lambda$ correlation function and interaction parameters for di-hyperon searches are discussed.