Skyrmions with low binding energies

TL;DR

This paper explores two modified Skyrme models to achieve lower nuclear binding energies, with one model's results closely matching experimental data, indicating potential improvements over the standard model.

Contribution

It introduces two variants of the Skyrme model that produce lower binding energies, with one model aligning more closely with experimental observations.

Findings

Binding energies are lower than in the standard Skyrme model.

The second model's energies are close to experimental values.

Solitons deviate from previously assumed ans"atze.

Abstract

Nuclear binding energies are investigated in two variants of the Skyrme model: the first replaces the usual Skyrme term with a term that is sixth order in derivatives, and the second includes a potential that is quartic in the pion fields. Solitons in the first model are shown to deviate significantly from ans\"atze previously assumed in the literature. The binding energies obtained in both models are lower than those obtained from the standard Skyrme model, and those obtained in the second model are close to the experimental values.