A model of non-perturbative gluon emission in an initial state parton shower

TL;DR

This paper introduces a model for non-perturbative gluon emission in initial state parton showers, improving data fits across energies and discussing implications for LHC extrapolation.

Contribution

It presents a simple modification to parton shower algorithms to incorporate non-perturbative effects throughout evolution, enhancing modeling accuracy.

Findings

Good fit to experimental data across various energies.

Combining with conventional non-perturbative parameters yields reasonable results.

Discusses potential extrapolation to LHC energies.

Abstract

We consider a model of transverse momentum production in which non-perturbative smearing takes place throughout the perturbative evolution, by a simple modification to an initial state parton shower algorithm. Using this as the important non-perturbative ingredient, we get a good fit to data over a wide range of energy. Combining it with the non-perturbative masses and cutoffs that are a feature of conventional parton showers also leads to a reasonable fit. We discuss the extrapolation to the LHC.