Charged-current neutrino-nucleus reactions within the SuSAv2-MEC approach

TL;DR

This paper develops a relativistic model for charged-current neutrino-nucleus reactions, incorporating meson-exchange currents, and demonstrates good agreement with experimental data across a wide energy spectrum.

Contribution

It introduces an improved SuSAv2-MEC approach that includes Relativistic Mean Field effects and analyzes the impact of 2p-2h MEC on neutrino interactions.

Findings

Good agreement with experimental data across energies

Significant impact of 2p-2h MEC on response functions

Enhanced understanding of neutrino-nucleus reaction mechanisms

Abstract

We present a detailed study of charged-current (CC) neutrino-nucleus reactions in a fully relativis- tic framework and comparisons with recent experiments spanning an energy range from hundreds of MeV up to 100 GeV within the SuperScaling Approach, which is based on the analysis of electron- nucleus scattering data and has been recently improved with the inclusion of Relativistic Mean Field theory effects. We also evaluate and discuss the impact of two-particle two-hole meson-exchange currents (2p-2h MEC) on neutrino-nucleus interactions through the analysis of two-particle two-hole axial and vector contributions to weak response functions in a fully relativistic Fermi gas. The results show a fairly good agreement with experimental data over the whole range of neutrino energies.