# Jet Structure Studies in Small Systems

## TL;DR

This paper investigates how jet shapes depend on event multiplicity in small collision systems using Monte Carlo simulations, revealing a significant influence of multiple-parton interactions on jet structure.

## Contribution

It introduces a detailed analysis of jet shape dependence on multiplicity and identifies a jet size measure unaffected by model variations and reconstruction methods.

## Key findings

- Multiple-parton interactions significantly modify jet shapes.
- A characteristic jet size measure is independent of model settings.
- Jet shape dependence on multiplicity is consistent across different simulations.

## Abstract

A study investigating a possible jet shape dependence on the charged event multiplicity was performed on collision samples generated by Monte-Carlo (MC) event generators PYTHIA and HIJING++. We calculated the integral jet shape and found a significant modification caused by multiple-parton interactions. By interchanging and enabling different model ingredients in the simulations and analyzing the results in several $p_T$ bins and event multiplicity classes, we found a characteristic jet size measure that was independent of the chosen tunes, settings, and jet reconstruction algorithms.