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

Hemant Prasad*, Jan T. Sobczyk†, Rwik Dharmapal Banerjee, J. Luis Bonilla, Krzysztof M. Graczyk, and Beata E. Kowal

Artur M. Ankowski

  • M. Smoluchowski Institute of Physics, Faculty of Physics, Astronomy, and Applied Computer Science, Jagiellonian University, Ul. Profesora Stanisława Łojasiewicza 11, 30-348 Kraków, Poland

  • *Contact author: hemant.prasad@uwr.edu.pl
  • †Contact author: jan.sobczyk@uwr.edu.pl
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Phys. Rev. D 113, 096023 – Published 29 May, 2026

DOI: https://doi.org/10.1103/zsbh-z9td

Abstract

Recent experimental data from MINERνA 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.

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Phys. Rev. D 113, 096023– Published 29 May, 2026
  • Received 8 January 2026
  • Accepted 23 April 2026
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