Deciphering the phases of QCD matter with fluctuations and correlations of conserved charges

TL;DR

This paper reviews recent experimental and theoretical advances in understanding the QCD phase diagram through fluctuations and correlations of conserved charges, highlighting implications for the phase structure of strongly interacting matter.

Contribution

It synthesizes experimental measurements of net-proton fluctuations and theoretical calculations of conserved charge correlations to elucidate the QCD phase structure.

Findings

Net-proton fluctuation measurements inform the QCD phase diagram.

Correlations between conserved charges provide insights into phase transitions.

Experimental prospects for exploring conserved charge correlations are discussed.

Abstract

A review is given on recent experimental and theoretical/phenomenological developments regarding the phase structure of the strongly interacting matter. Specifically, evolution with the collision energy of net-proton number fluctuations as measured by several experiments are presented and their implications for the QCD phase diagram are outlined. In addition, theoretical calculations on correlations between conserved charges are presented and prospects for their experimental explorations are addressed.