Squeezed back-to-back correlations of $\phi\phi$ in Au+Au and d+Au collisions at the Relativistic Heavy Ion Collider energies

TL;DR

This paper studies the squeezed back-to-back correlations of phi mesons in heavy-ion collisions at RHIC, suggesting potential observability and implications for understanding mass modifications in the medium.

Contribution

It introduces a method to calculate BBC functions using experimental mass modifications and hydrodynamic source models, proposing experimental measurement for insight into phi meson mass changes.

Findings

BBC of phi mesons may be observed in d+Au and peripheral Au+Au collisions at RHIC.

Mass modifications of phi mesons influence the BBC signals.

Experimental measurement of BBC can shed light on in-medium phi meson properties.

Abstract

We investigate the squeezed back-to-back correlations (BBC) of $\phi\phi$, caused by the mass modification of the particles in the source medium, in the heavy-ion collisions of Au+Au and d+Au at the Relativistic Heavy Ion Collider (RHIC) energies. The BBC functions are calculated using the modified masses extracted from experimental data and the source space-time distributions provided by the viscous hydrodynamic code VISH2+1. Our investigations indicate that the BBC of $\phi\phi$ may perhaps be observed in the collisions of d+Au and the peripheral collisions of Au+Au at the RHIC. We suggest to measure the BBC experimentally for understanding the mass modifications of the $\phi$ meson in the collisions.