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arXiv 0710.4900hep-th
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膜模型中的手征对称性破缺

Chiral Symmetry Breaking in Brane Models

Norio Horigome, Madoka Nishimura, Yoshiaki Tanii

摘要:

本文讨论了一般相交Dq/Dp膜模型中的手征对称性破缺,该模型由N_cDq-膜和一个具有s维相交的Dp-膜组成.在相交处存在一个局域化的类QCD理论,Dq/Dp模型给出了它的全息描述,横向于Dq和Dp膜的方向的旋转对称性可以用手征对称性来表示,在某些情况下,手征对称性是非阿贝尔的。Dq-膜和Dp-膜之间的渐近距离对应于夸克质量。通过研究近视界和大N_c极限下Dq膜背景中的探测Dp膜动力学,发现手征对称性自发破缺,出现(伪)Nambu-Goldstone玻色子。我们还讨论了有限温度下的模型。

英文摘要:

We discuss the chiral symmetry breaking in general intersecting Dq/Dp brane models consisting of N_c Dq-branes and a single Dp-brane with an s-dimensional intersection. There exists a QCD-like theory localized at the intersection and the Dq/Dp model gives a holographic description of it. The rotational symmetry of directions transverse to both of the Dq and Dp-branes can be identified with a chiral symmetry, which is non-Abelian for certain cases. The asymptotic distance between the Dq-branes and the Dp-brane corresponds to a quark mass. By studying the probe Dp-brane dynamics in a Dq-brane background in the near horizon and large N_c limit we find that the chiral symmetry is spontaneously broken and there appear (pseudo-)Nambu-Goldstone bosons. We also discuss the models at finite temperature.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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