# Final state multiplicity and particle correlation in small systems

## TL;DR

This paper discusses how final state variables and particle correlations in small systems can be understood through Multiple Parton Interaction models, highlighting recent CMS results on long-range correlations and the importance of event multiplicity.

## Contribution

It provides an overview of the latest experimental results on particle correlations in small systems and emphasizes the role of event multiplicity within the MPI framework.

## Key findings

- Recent CMS results show significant long-range near-side correlations.
- Event multiplicity is crucial for understanding particle correlation patterns.
- MPI interpretation helps explain the observed phenomena in small systems.

## Abstract

Final state variables and particle correlation will be discussed under a Multiple Parton Interaction (MPI) interpretation. The state of the art about the latest results on such variables will be provided. Furthermore the role played by event multiplicity in the deep understanding of particle correlation, in particular concerning the new results on the Long-Range Near-Side two particle correlations by the CMS Collaboration, will be discussed.