Quark mass deformation of holographic massless QCD
Quark mass deformation of holographic massless QCD
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DOI：
10.1088/1126-6708/2008/07/089
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发表时间：
2008-03
影响因子：
5.4
通讯作者：
K. Hashimoto;T. Hirayama;Feng-Li Lin;Ho-Ung Yee
中科院分区：
文献类型：
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作者：
K. Hashimoto;T. Hirayama;Feng-Li Lin;Ho-Ung Yee
我们利用Sakai和Sugimoto提出的D4/D8/-膜组态，提出了几种无质量QCD全息模型的夸克质量形变。变形是基于引入额外的D4-或D 6-膜远离QCD D4膜。这个想法类似于扩展的Technicolor理论，其中通过额外的D-膜介导的手征对称性破缺到QCD以诱导非零夸克质量。在D膜图像和全息对偶引力描述中，夸克和π介子质量是由新的有限面积的世界表瞬子产生的。我们还导出了Gell-Mann-Oakes-Renner关系式，并求出了Sakai-Sugimoto模型中手征凝聚体的值。
We propose several quark mass deformations of the holographic model of massless QCD using the D4/D8/-brane configuration proposed by Sakai and Sugimoto. The deformations are based on introducing additional D4- or D6-branes away from the QCD D4 branes. The idea is similar to extended technicolor theories, where the chiral symmetry breaking by additional D-branes is mediated to QCD to induce non-zero quark masses. In the D-brane picture as well as the holographic dual gravity description, the quark and the pion masses are generated by novel worldsheet instantons with finite area. We also derive the Gell-Mann-Oakes-Renner relation, and find the value of the chiral condensate in the Sakai-Sugimoto model.