A simple mass-splitting mechanism in the Skyrme model

TL;DR

This paper demonstrates that adding a specific chiral symmetry breaking term to the Skyrme model with omega mesons can successfully reproduce the proton-neutron mass difference, offering a simple solution within the model.

Contribution

The paper introduces a minimal modification to the Skyrme model that accounts for the proton-neutron mass splitting.

Findings

Successfully reproduces proton-neutron mass difference

Shows minimal chiral symmetry breaking term suffices

Enhances the Skyrme model's explanatory power

Abstract

It is shown that the addition of a single chiral symmetry breaking term to the standard omega meson variant of the nuclear Skyrme model can reproduce the proton-neutron mass difference.