Fine-tuning final state interactions model in NuWro Monte Carlo event generator

TL;DR

This paper refines the modeling of final state interactions in the NuWro neutrino event generator using recent MINERvA data, developing an event reweighting tool and suggesting stronger nucleon reinteractions are needed.

Contribution

It introduces a new reweighting tool for FSI modeling in NuWro and provides updated insights on the strength of nucleon reinteractions based on experimental data.

Findings

Stronger nucleon reinteractions are required than previously assumed.

Reweighting tool enables future adjustments of FSI effects.

Results align with proton transparency measurement uncertainties.

Abstract

Recent experimental data from MINERvA on transverse kinematics observables across four different nuclear targets - carbon, oxygen, iron, and lead - have been utilized to refine the modeling of final state interaction effects in the NuWro Monte Carlo neutrino event generator. For this purpose, we have developed an event reweighting tool for future applications to adjust the strength of final-state interactions. This study highlights the requirement for stronger nucleon reinteractions than previously assumed, but it still falls within the uncertainty range observed in a study comparing proton transparency measurements. This conclusion has significant implications for both experimental and theoretical work involving NuWro.