Skyrmions with massive pions
Skyrmions with massive pions
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DOI：
10.1103/physrevc.73.055205
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发表时间：
2006-02
影响因子：
3.1
通讯作者：
R. Battye;P. Sutcliffe
中科院分区：
文献类型：
--
作者：
R. Battye;P. Sutcliffe
在无质量π介子的Skyrme模型中，最小能量的多Skyrmion是壳状的，重子密度位于多面体的边缘，近似球形，一般为富勒烯型。在本文中，我们表明，在Skyrme模型与大质量π介子这些配置是不稳定的重子数足够大。利用全非线性场论的数值模拟，我们表明，这些结构崩溃，形成定性不同的稳定Skyrmion解决方案。这些新的Skyrmions有一个平坦的结构，并显示出集群现象到较低的电荷组件，特别是组件的重子数3和4。与基于真实的核的期望相比，具有大质量π介子的Skyrmions的这些新的定性特征是令人鼓舞的。
In the Skyrme model with massless pions, the minimal energy multi-Skyrmions are shell-like, with the baryon density localized on the edges of a polyhedron that is approximately spherical and generically of the fullerene-type. In this paper we show that in the Skyrme model with massive pions these configurations are unstable for sufficiently large baryon number. Using numerical simulations of the full nonlinear field theory, we show that these structures collapse to form qualitatively different stable Skyrmion solutions. These new Skyrmions have a flat structure and display a clustering phenomenon into lower charge components, particularly components of baryon numbers three and four. These new qualitative features of Skyrmions with massive pions are encouraging in comparison with the expectations based on real nuclei.