Flow fluctuations and long-range correlations: elliptic flow and beyond

TL;DR

This paper reviews recent advances in understanding collective behavior and fluctuations in heavy-ion collisions, highlighting how event-by-event fluctuations explain long-range correlations and open new avenues for constraining theoretical models.

Contribution

It provides a concise overview of how fluctuations account for phenomena like the ridge and shoulder in two-particle correlations, advancing the field's understanding.

Findings

Event-by-event fluctuations explain long-range correlations.

Progress in modeling the ridge and shoulder phenomena.

New observables help constrain theoretical models.

Abstract

These proceedings consist of a brief overview of the current understanding of collective behavior in relativistic heavy-ion collisions. In particular, recent progress in understanding the implications of event-by-event fluctuations have solved important puzzles in existing data -- the "ridge" and "shoulder" phenomena of long-range two-particle correlations -- and have created an exciting opportunity to tightly constrain theoretical models with many new observables.