# Optimizing the parton shower model in PYTHIA with pp collision data at $\sqrt{s}$ = 13 TeV

## TL;DR

This paper describes the optimization of the PYTHIA8 parton shower model using recent 13 TeV proton-proton collision data from the LHC, improving the simulation of quark and gluon evolution into jets.

## Contribution

The paper introduces a new tuning of the PYTHIA8 parton shower model based on recent experimental data, enhancing its accuracy in simulating hadron collision events.

## Key findings

- Optimized PYTHIA8 model better matches experimental data
- Improved simulation of event shape variables
- Enhanced prediction of jet cross-sections

## Abstract

Production of quarks and gluons in hadron collisions tests Quantum Chromodynamics (QCD) over a wide range of energy. Models of QCD are implemented in event generators to simulate hadron collisions and evolution of quarks and gluons into jets of hadrons. PYTHIA8 uses the parton shower model for simulating particle collisions and is optimized using experimental observations. Recent measurements of event shape variables and jet cross-sections in pp collisions at $\sqrt{s}$ = 13 TeV at the Large Hadron Collider have been used to optimize the parton shower model as used in PYTHIA8.