Tuning the GENIE Pion Production Model with MINERvA Data

Abstract

Faced with unresolved tensions between neutrino interaction measurements at few-GeV neutrino energies, current experiments are forced to accept large systematic uncertainties to cover discrepancies between their data and model predictions. In this paper, the widely used pion production model in GENIE is compared to four MINERvA charged current pion production measurements using NUISANCE. Tunings, ie, adjustments of model parameters, to help match GENIE to MINERvA and older bubble chamber data are presented here. We find that scattering off nuclear targets as measured in MINERvA is not in good agreement with scattering off nucleon (hydrogen or deuterium) targets in the bubble chamber data. An additional ad hoc correction for the low-$Q^2$ region, where collective effects are expected to be large, is also presented. While these tunings and corrections improve the agreement of GENIE with the data, the modeling is imperfect. The development of these tunings within the NUISANCE frameworkallows for straightforward extensions to other neutrino event generators and models, and allows omitting and including new data sets as they become available.

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• High-statistics measurement of neutrino quasielastic-like scattering at <E_nu>=~6 GeV on a hydrocarbon target
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• Lepton-Nucleus Cross Section Measurements for DUNE with the LDMX Detector
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• Exploring Neutrino-Nucleus Interactions in the GeV Regime using MINERvA
• Neutrino-induced coherent ${\pi }^{+}$ production in C, CH, Fe and Pb at $⟨E_{\nu }⟩\sim 6$ GeV
• Angular distributions in Monte Carlo event generation of weak single-pion production
• Measurements of the ${\nu }_{\mu }$ and ${\bar{\nu }}_{\mu }$-induced Coherent Charged Pion Production Cross Sections on ${}^{12}C$ by the T2K experiment
• Assessing the theory-data tension in neutrino-induced charged pion production: the effect of final-state nucleon distortion
• Measurements of protons and charged pions emitted from ${\nu }_{\mu }$ charged-current interactions on iron at a mean neutrino energy of 1.49GeV using a nuclear emulsion detector
• Snowmass 2021 LoI: Neutrino-induced Shallow- and Deep-Inelastic Scattering
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• Data-driven model validation for neutrino-nucleus cross section measurements
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• Results from the T2K experiment on neutrino mixing including a new far detector $\mu$-like sample
• Improving Neutrino-Nuclei Interaction Models: Recommendations and Case Studies on Peelle's Pertinent Puzzle
• Measurement of the differential cross section for neutral pion production in charged-current muon neutrino interactions on argon with the MicroBooNE detector
• Neutral pion reconstruction using machine learning in the MINERvA experiment at $⟨E_{\nu }⟩\sim 6$ GeV