More on a holographic dual of QCD
More on a holographic dual of QCD
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DOI：
10.1143/ptp.114.1083
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发表时间：
2005-07
影响因子：
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通讯作者：
T. Sakai;S. Sugimoto
中科院分区：
文献类型：
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作者：
T. Sakai;S. Sugimoto
我们研究了之前论文 [T. Sakai 和 S. Sugi-moto，Prog。理论。物理。 113（2005），843； hep-th/0412141]基于IIA型弦理论中嵌入D4膜背景中的探针D8膜。我们通过分析和数值计算获得耦合常数，并将其与实验数据进行比较。研究发现，π介子形状因子以及 Wess-Zumino-Witten 项中的矢量介子优势以一种有趣的方式存在。我们还研究了 ω → πγ 和 ω → 3π 衰减幅度。结果表明，与这些衰减幅度相关的相互作用具有与 Fujiwara 等人提出的结构相同的结构。 [T。 Fujiwara、T. Kugo、H. Terao、S. Uehara 和 K. Yamawaki，Prog。理论。物理。 73（1985），926]。推导了无限介子塔的质量和耦合常数之间的各种关系。这些关系在分析中起着至关重要的作用。我们发现大部分结果与实验一致。
We investigate the interactions among the pion, vector mesons and external gauge fields in the holographic dual of massless QCD proposed in a previous paper [T. Sakai and S. Sugi-moto, Prog. Theor. Phys. 113 (2005), 843; hep-th/0412141] on the basis of probe D8-branes embedded in a D4-brane background in type IIA string theory. We obtain the coupling constants by performing both analytic and numerical calculations, and compare them with experimental data. It is found that the vector meson dominance in the pion form factor as well as in the Wess-Zumino-Witten term holds in an intriguing manner. We also study the ω → πγ and ω → 3π decay amplitudes. It is shown that the interactions relevant to these decay amplitudes have the same structure as that proposed by Fujiwara et al. [T. Fujiwara, T. Kugo, H. Terao, S. Uehara and K. Yamawaki, Prog. Theor. Phys. 73 (1985), 926]. Various relations among the masses and the coupling constants of an infinite tower of mesons are derived. These relations play crucial roles in the analysis. We find that most of the results are consistent with experiments.