具有松束缚势的广义Skyrme模型
Generalized Skyrme model with the loosely bound potential
摘要：
我们研究了一个广义的松散结合的Skyrme模型，其中包括一个六阶导数项的Skyrme模型-由其流体般的性质的动机-和二阶松散结合的潜力-由降低较高电荷的Skyrmions的经典结合能的动机。本文对拓扑电荷B=4的Skyrmion用有理映射近似，计算了它的结合能，并对这种近似的系统误差作了估计。在参数空间，我们可以探索内的合理映射近似，我们发现经典的结合能低至1.8%，一旦考虑到自旋-同位旋量子化的贡献，我们得到的结合能低至5.3%。我们还计算了六阶导数项对电荷密度和轴向耦合的贡献。
英文摘要：
We study a generalization of the loosely bound Skyrme model which consists of the Skyrme model with a sixth-order derivative term - motivated by its fluid-like properties - and the second-order loosely bound potential - motivated by lowering the classical binding energies of higher-charged Skyrmions. We use the rational map approximation for the Skyrmion of topological charge B=4, calculate the binding energy of the latter and estimate the systematic error in using this approximation. In the parameter space that we can explore within the rational map approximation, we find classical binding energies as low as 1.8% and once taking into account the contribution from spin-isospin quantization we obtain binding energies as low as 5.3%. We also calculate the contribution from the sixth-order derivative term to the electric charge density and axial coupling.
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