Associated production in pp and heavy ion collisions

TL;DR

This paper reviews recent theoretical, phenomenological, and experimental advances in studying double parton scattering in proton-proton and heavy ion collisions at the LHC, highlighting its role in understanding nuclear matter effects.

Contribution

It provides a comprehensive overview of DPS in both pp and heavy ion collisions, emphasizing new insights into cold nuclear matter effects and nuclear parton densities.

Findings

Recent progress in DPS theoretical models

Experimental evidence of DPS in pp collisions

Implications for nuclear parton distribution functions

Abstract

Associated particle production processes in pp and heavy ion collisions at the LHC are in particular interesting in the sense that they provide unique tools to study double parton scattering (DPS) mechanism. In this talk, I will first review the recent theoretical, phenomenological and experimental developments of DPS in pp collisions. Then, I will focus on the DPS studies in heavy ion collisions, and stress their roles in understanding the cold nuclear matter effects, such as the (poorly known) impact-parameter dependent nuclear parton densities.