Particle production and flow-like effects in small systems

TL;DR

This paper reviews recent experimental findings on particle production and collective-like effects in small collision systems at the LHC, highlighting similarities with heavy-ion collisions through multi-particle correlations and particle production studies.

Contribution

It provides an overview of current experimental results on collective phenomena in small systems, emphasizing new measurements involving multiplicity and transverse spherocity.

Findings

Observation of collective-like behavior in small systems

Multi-particle correlation measurements support collective effects

Particle production varies with multiplicity and transverse spherocity

Abstract

Particle production in small systems (pp and p-Pb collisions) has unveiled unexpected collective-like behavior. In this work an overview of the current investigation on the similarities between small systems and heavy-ion collisions is presented. Recent results from the experiments at the LHC are discussed. They include measurements of multi-particle correlations, as well as, identified particle production as a function of charged-particle multiplicity density, and more recently, as a function of transverse spherocity.