Initial state and pre-equilibrium effects in small systems

TL;DR

This paper emphasizes the significance of initial state and early time effects in explaining long-range azimuthal correlations observed in high-multiplicity proton-proton and proton-nucleus collisions.

Contribution

It highlights the role of initial state and pre-equilibrium dynamics in understanding correlations in small collision systems.

Findings

Initial state effects are crucial for azimuthal correlations.

Pre-equilibrium dynamics influence observed phenomena.

Understanding these effects improves theoretical models.

Abstract

We discuss the importance of initial state and early time effects with regard to the theoretical understanding of long range azimuthal correlations observed in high-multiplicity $p+p$ and $p+A$ collisions.