How to Measure Squeeze Out

TL;DR

This paper models the 'squeeze out' phenomenon in heavy-ion collisions using a flux tube model and proposes two-particle correlations relative to the $v_2$ axis as a measurement method.

Contribution

It introduces a flux tube model to simulate squeeze out effects and suggests a novel correlation-based measurement approach.

Findings

Flux tube model successfully reproduces squeeze out behavior.

Two-particle correlations can effectively measure the squeeze out effect.

Provides a new method for analyzing flow phenomena in heavy-ion collisions.

Abstract

Squeeze out happen when the expanding central fireball flows around a large surface flux tube in a central Au-Au collision at RHIC. We model such an effect in a flux tube model. Two particle correlations with respect to the $v_2$ axis formed by the soft fireball particles flowing around this large flux tube is a way of measuring the effect.