First look at the PYTHIA8 hadronization program for neutrino interaction generators

TL;DR

This paper explores integrating the PYTHIA8 hadronization program into neutrino interaction generators to improve modeling of hadronic final states, leveraging expertise from high-energy physics experiments.

Contribution

It proposes implementing PYTHIA8 in neutrino generators like GENIE and NEUT, enhancing hadronization modeling based on HERMES experiment insights.

Findings

Preliminary comparisons show promising agreement with experimental data.

PYTHIA8 offers potential improvements over PYTHIA6 in neutrino event simulations.

The study lays groundwork for more accurate neutrino interaction modeling.

Abstract

Current and future neutrino oscillation experiments utilize information of hadronic final states to improve sensitivities on oscillation parameters measurements. Among the physics of hadronic systems in neutrino interactions, the hadronization model controls multiplicities and kinematics of final state hadrons from the primary interaction vertex. For relatively high invariant mass events, neutrino interaction generators rely on the PYTHIA6 hadronization program. Here, we show a possible improvement of this process in neutrino event generators, by utilizing expertise from the HERMES experiment. Next, we discuss the possibility to implement the PYTHIA8 program in neutrino interaction generators, including GENIE and NEUT. Finally, we show preliminary comparisons of PYTHIA8 predictions with neutrino hadron multiplicity data from bubble chamber experiments within the GENIE hadronization validation tool.