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arXiv · 2504.06857

Machine Learning-Assisted Unfolding for Neutrino Cross-section Measurements with the OmniFold Technique

Roger G. Huang·Andrew Cudd·Masaki Kawaue·Tatsuya Kikawa·Benjamin Nachman·Vinicius Mikuni·Callum Wilkinson
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Abstract

The choice of unfolding method for a cross-section measurement is tightly coupled to the model dependence of the efficiency correction and the overall impact of cross-section modeling uncertainties in the analysis. A key issue is the dimensionality used in unfolding, as the kinematics of all outgoing particles in an event typically affect the reconstruction performance in a neutrino detector. OmniFold is an unfolding method that iteratively reweights a simulated dataset, using machine learning to utilize arbitrarily high-dimensional information, that has previously been applied to proton-proton and proton-electron datasets. This paper demonstrates OmniFold's application to a neutrino cross-section measurement for the first time using a public T2K near detector simulated dataset, comparing its performance with traditional approaches using a mock data study.

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Roger G. Huang, Andrew Cudd, Masaki Kawaue, Tatsuya Kikawa, Benjamin Nachman, Vinicius Mikuni, Callum Wilkinson. 2025-04-09. Machine Learning-Assisted Unfolding for Neutrino Cross-section Measurements with the OmniFold Technique. https://doi.org/10.1103/sp1f-n9k2

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