Extensions of Superscaling from Relativistic Mean Field Theory: the SuSAv2 Model

TL;DR

This paper develops the SuSAv2 model, extending the superscaling approach using relativistic mean field theory to accurately describe electron and neutrino quasielastic scattering data.

Contribution

It introduces a new phenomenological model, SuSAv2, incorporating RMF effects into the superscaling framework for better nuclear response predictions.

Findings

SuSAv2 accurately reproduces electron scattering data.

The model provides consistent descriptions of neutrino-nucleus reactions.

Enhanced understanding of nuclear responses in quasielastic scattering.

Abstract

We present a systematic analysis of the quasielastic scaling functions computed within the Relativistic Mean Field (RMF) Theory and we propose an extension of the SuperScaling Approach (SuSA) model based on these results. The main aim of this work is to develop a realistic and accurate phenomenological model (SuSAv2), which incorporates the different RMF effects in the longitudinal and transverse nuclear responses, as well as in the isovector and isoscalar channels. This provides a complete set of reference scaling functions to describe in a consistent way both $(e, e')$ processes and the neutrino/antineutrino-nucleus reactions in the quasielastic region. A comparison of the model predictions with electron and neutrino scattering data is presented.