# Modeling neutrino-nucleus interactions for neutrino oscillation experiments

## TL;DR

This paper advances the modeling of neutrino-nucleus interactions using relativistic theories, improving Monte Carlo simulations for neutrino oscillation experiments and incorporating multi-nucleon effects for better data agreement.

## Contribution

It introduces a relativistic SuSAv2 model for neutrino interactions and implements multi-nucleon excitations in GENIE, enhancing simulation accuracy.

## Key findings

- SuSAv2 model accurately predicts neutrino cross sections
- Multi-nucleon excitations significantly impact cross section calculations
- Model comparisons show improved agreement with T2K data

## Abstract

We present our recent progress on the relativistic modeling of neutrino-nucleus reactions for their implementation in MonteCarlo event generators (GENIE, NEUT) employed in neutrino oscillation experiments. We compare charged-current neutrino and antineutrino cross sections obtained within the SuSAv2 model, which is based on the Relativistic Mean Field theory and on the analysis of the superscaling behavior exhibited by ($e,e'$) data. We also evaluate and discuss the impact of multi-nucleon excitations arising from 2p-2h states excited by the action of weak forces in a fully relativistic framework, showing for the first time their implementation in GENIE and their comparison with recent T2K data.