Benchmarking neutrino interaction models via a comparative analysis of kinematic imbalance measurements from the T2K, MicroBooNE and MINERvA experiments

Abstract

Recent neutrino-nucleus cross-section measurements of observables characterising kinematic imbalance from the T2K, MicroBooNE and MINERvA experiments are used to benchmark predictions from widely used neutrino interaction event generators. Given the different neutrino energy spectra and nuclear targets employed by the three experiments, comparisons of model predictions to their measurements breaks degeneracies that would be present in any single measurement. In particular, the comparison of T2K and MINERvA measurements offers a probe of energy dependence, whilst a comparison of T2K and MicroBooNE investigates scaling with nuclear target. In order to isolate the impact of individual nuclear effects, model comparisons are made following systematic alterations to: the nuclear ground state; final state interactions and multi-nucleon interaction strength. The measurements are further compared to the generators used as an input to DUNE/SBN and T2K/Hyper-K analyses. Whilst no model is able to quantitatively describe all the measurements, evidence is found for mis-modelling of A-scaling in multi-nucleon interactions and it is found that tight control over how energy is distributed among hadrons following final state interactions is likely to be crucial to achieving improved agreement. Overall, this work provides a novel characterisation of neutrino interactions whilst offering guidance for refining existing generator predictions.

23 pages, 22 figures. Minor updates to the text to improve clarity. Added references

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• The T2K Neutrino Flux Prediction
• Lepton Mass Effects in Single Pion Production by Neutrinos
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• The NEUT Neutrino Interaction Simulation
• Improving the accuracy of neutrino energy reconstruction in charged-current quasielastic scattering off nuclear targets
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Cited by in corpus (4)

• Data-driven model validation for neutrino-nucleus cross section measurements
• Implementation of the Martini-Ericson-Chanfray-Marteau RPA-based neutrino and antineutrino cross-section model in the GENIE neutrino event generator
• Exclusive Hadron Observables in Neutrino Induced $2p2h$ Multinucleon Knockout
• Single pion-production and pion propagation in Achilles