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Implementation of the Martini-Ericson-Chanfray-Marteau RPA-based neutrino and antineutrino cross-section model in the GENIE neutrino event generator

L. Russo1,*, M. Martini2,1,†, S. Dolan3, L. Munteanu3, B. Popov1, and C. Giganti1

  • *Contact author: lrusso@lpnhe.in2p3.fr
  • †Contact author: mmartini@lpnhe.in2p3.fr
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Phys. Rev. D 113, 012006 – Published 13 January, 2026

DOI: https://doi.org/10.1103/v8hq-kppp

Abstract

We discuss the first implementation of the Martini-Ericson-Chanfray-Marteau random phase approximation-based (anti)neutrino cross-section model for quasielastic (1p1h) and multinucleon (2p2h and 3p3h) excitations in the widely used GENIE neutrino event generator. Validation steps are presented, in particular, through direct comparisons of GENIE cross-section output with original calculations performed by the authors of the model. Predictions for C12, O16, and Ar40 are compared with some available T2K and MicroBooNE experimental measurements showing a reasonable agreement.

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Phys. Rev. D 113, 012006– Published 13 January, 2026
  • Received 22 August 2025
  • Accepted 9 December 2025
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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.

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