Searching for squeezed particle-antiparticle correlations in high energy heavy ion collisions

TL;DR

This paper proposes a method to detect squeezed particle-antiparticle correlations in high energy heavy ion collisions, which could indicate in-medium hadron mass modifications, demonstrated through simulations of phi-phi pairs at RHIC.

Contribution

It introduces a practical approach to experimentally search for squeezed correlations, bridging theoretical predictions with measurable quantities.

Findings

Method demonstrated with simulated phi-phi pairs

Potential to observe in-medium hadron mass modifications

Provides a clear experimental search strategy

Abstract

Squeezed correlations of particle-antiparticle pairs were predicted to exist if the hadron masses were modified in the hot and dense medium formed in high energy heavy ion collisions. Although well-established theoretically, they have not yet been observed experimentally. We suggest here a clear method to search for such signal, by analyzing the squeezed correlation functions in terms of measurable quantities. We illustrate this suggestion for simulated phi-phi pairs at RHIC energies.