arXiv 1111.52352011-11-22hep-phhep-th

大尺寸全息瞬子的Skyrmion性质

Skyrmion properties from holographic instantons of large size

Fen Zuo, Feng-Kun Guo, Tao Huang

备注：: 19 pages, no figures

摘要：

基于Skyrmion的Intanton近似和全息方法的最新进展，我们利用全息瞬子产生的Skyrmion研究重子性质。首先，我们采用Atiyah和Manton的早期观察表明，瞬子近似给出了正确的Skyrmion解决方案的红外行为，从而那些电磁形状因子的核子。然后，我们使用Skyrmions产生的平空间瞬子的解决方案来研究各种重子的性质，治疗的瞬子大小作为一个任意变量。研究发现，需要一个大的瞬子尺寸来再现物理轴向耦合。从这样的一个瞬子组态出发，对Skyrme模型中其他重子量的预言大大改进了原来的结果。一些结果重现那些通过量子化的完整的瞬子的解决方案，而不需要微调的介子参数。由此我们得出结论，在低能区的重子可以有效地描述大的瞬子。

英文摘要：

Based on the intanton approximation of Skyrmion and recent progresses on the holographic approach, we study baryon properties using Skyrmions generated from holographic instantons. First we employ Atiyah and Manton's early observation to show that the instanton approximation gives the correct infrared behavior for the Skyrmion solution, and thus those of the electromagnetic form factors of the nucleon. We then use Skyrmions generated from flat-space instanton solutions to study various baryon properties, treating the instanton size as an arbitrary variable. It is found that, a large instanton size is required to reproduce the physical axial coupling. From such an instanton configuration, the predictions for other baryon quantities in the Skyrme model improve the original results quite a lot. Some of the results reproduce those by quantizing the full instanton solution, while no fine-tuning of the mesonic parameters are needed. From these we conclude that the baryons in the low energy region can be effectively described by large instantons.

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摘要：

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