Investigating the parton shower model in PYTHIA8 with pp collision data at $\surd{s}=13\, TeV$

TL;DR

This paper evaluates the accuracy of PYTHIA8's parton shower model by comparing its simulations with recent 13 TeV proton-proton collision data from the LHC, aiming to improve understanding of quark and gluon production.

Contribution

It provides a detailed investigation of PYTHIA8's parton shower model using recent experimental data, highlighting areas for potential model refinement.

Findings

Good agreement with some observables

Discrepancies in certain jet cross-sections

Insights into parton shower modeling improvements

Abstract

Understanding the production of quarks and gluons in high energy collisions and their evolution is a very active area of investigation. Monte carlo event generator PYTHIA8 uses the parton shower model to simulate such collisions and is optimized using experimental observations. Recent measurements of event shape variables and differential jet cross-sections in pp collisions at $\surd{s} = 13\, TeV$ at the Large Hadron Collider have been used to investigate further the parton shower model as used in PYTHIA8.