NEUT development for T2K and relevance of updated 2p2h models

TL;DR

This paper discusses the development and tuning of the NEUT neutrino interaction generator to include advanced CCQE models, especially 2p2h effects, to improve T2K experiment simulations based on recent experimental data.

Contribution

It introduces updated 2p2h models into NEUT and demonstrates their tuning using MINER$ u$A and MiniBooNE data for T2K.

Findings

Successful incorporation of sophisticated 2p2h models into NEUT

Tuned models improve agreement with experimental data

Development of a default cross-section model for T2K

Abstract

The MiniBooNE large axial-mass anomaly has motivated the development of new theoretical Charged Current Quasi-Elastic (CCQE) cross-section models in recent years. These proceedings review the development of the neutrino simulation generator NEUT to incorporate these more sophisticated CCQE models, including multi-nucleon interaction (2p2h) effects. The fit results on the MINER$\nu$A and MiniBoone data are used to tune neutrino interaction models in NEUT and develop a default cross-section model for T2K.