Squeezed back-to-back correlation of $\bqD^0{\bar \bqD}^0$ in relativistic heavy-ion collisions

TL;DR

This paper studies the squeezed back-to-back correlation of D0 and anti-D0 mesons in relativistic heavy-ion collisions, revealing significant correlations in peripheral Au+Au collisions at RHIC energy, and proposes an experimental detection method.

Contribution

It introduces a novel analysis of the squeezed back-to-back correlation of D0 mesons considering in-medium mass modifications and source distributions from viscous hydrodynamics.

Findings

Significant BBC observed in peripheral Au+Au collisions at RHIC.

In-medium mass modification affects the strength of the correlation.

Proposed experimental detection method for BBC.

Abstract

We investigate the squeezed back-to-back correlation (BBC) of $D^0\!{\bar D}^0$ in relativistic heavy-ion collisions, using the in-medium mass modification calculated with a self-energy in hot pion gas and the source space-time distributions provided by the viscous hydrodynamic code VISH2+1. It is found that the BBC of $D^0\!{\bar D}^0$ is significant in peripheral Au+Au collisions at the RHIC energy. A possible way to detect the BBC in experiment is presented.