Hunting down the quark-gluon plasma in relativistic heavy-ion collisions

TL;DR

This paper reviews the current status of heavy-ion collision experiments aimed at creating and detecting quark-gluon plasma, highlighting evidence of its formation and prospects for direct observation in future collider experiments.

Contribution

It provides a comprehensive review of experimental evidence supporting quark-gluon plasma formation and discusses future prospects for direct detection in higher-energy collider experiments.

Findings

Evidence of strong radial flow in collisions

Thermal hadron emission observed

Primordial hadrosynthesis from deconfined stage

Abstract

The present status of the heavy-ion program to search for quark-gluon plasma is reviewed. The goal of this program is to recreate the Big Bang in the laboratory, by generating small chunks of exploding quark-gluon plasma (``The Little Bang''). I argue that the analogues of the three pillars of Big Bang Theory (Hubble flow, microwave background radiation, and primordial nucleosynthesis) have now been firmly established in heavy-ion collisions at SPS energies: there is convincing evidence for strong radial flow, thermal hadron emission, and primordial hadrosynthesis from a color-deconfined initial stage. Direct observation of the quark-gluon plasma phase via its electromagnetic radiation will be possible in planned collider experiments at higher energies.