论文标题

关于Skyrme模型中孤子晶体的稳健性

On the robustness of solitons crystals in the Skyrme model

论文作者

Barriga, Gonzalo, Canfora, Fabrizio, Lagos, Marcela, Torres, Matías, Vera, Aldo

论文摘要

在这项工作中,我们分析了包含额外的中间自由度的包含如何影响Skyrme模型的有限密度孤子晶体。特别是,在Skyrme $ω$ -Mesons模型以及Skyrme $ρ$ -Mesons理论中都构建了有限重子密度的HADRONIC晶体的第一个分析示例。这些配置具有任意拓扑电荷,并描述了被矢量 - 媒体云所包围的重型管的晶体。在$ω$ -Mesons的情况下,可以将七个耦合的非线性字段方程组的完整集始终减少到仅两个可集成的微分方程。 Skyrmion配置文件的一种颂歌,一个PDE $ω$ -Mesons字段。这种分析构建可以明确显示在Skyrme模型中包含$ω$ -Mesons如何减少Baryons之间的排斥相互作用能量。在Skyrme $ρ$ -Mesons案件中,可以使用Meron型ANSATZ构建分析解决方案,并根据其他$ρ$ -Mesons Action的耦合之一来固定一个耦合。我们表明,非常值得注意的是,通过要求我们的安萨兹(Ansatz)的一致性来获得耦合常数获得的值非常接近文献中使用的值,以减少没有矢量 - 中子的Skyrme模型的核结合能。此外,我们的分析结果与核意大利面阶段的可用结果定性一致。

In this work we analize how the inclusion of extra mesonic degrees of freedom affect the finite density solitons crystals of the Skyrme model. In particular, the first analytic examples of hadronic crystals at finite baryon density in both the Skyrme $ω$-mesons model as well as for the Skyrme $ρ$-mesons theory are constructed. These configurations have arbitrary topological charge and describe crystals of baryonic tubes surrounded by a cloud of vector-mesons. In the $ω$-mesons case, it is possible to reduce consistently the complete set of seven coupled non-linear field equations to just two integrable differential equations; one ODE for the Skyrmion profile and one PDE for the $ω$-mesons field. This analytical construction allows to show explicitly how the inclusion of $ω$-mesons in the Skyrme model reduces the repulsive interaction energy between baryons. In the Skyrme $ρ$-mesons case, it is possible to construct analytical solutions using a meron-type ansatz and fixing one of the couplings of the $ρ$-mesons action in terms of the others. We show that, quite remarkably, the values obtained for the coupling constants by requiring the consistency of our ansatz are very close to the values used in the literature to reduce nuclei binding energies of the Skyrme model without vector-mesons. Moreover, our analytical results are in qualitative agreement with the available results on the nuclear spaghetti phase.

扫码加入交流群

加入微信交流群

微信交流群二维码

扫码加入学术交流群,获取更多资源