arXiv 1402.18552014-02-08hep-th

类弦缺陷中弯曲因子减小的弹跳膜上的矢量场和费米子场

Vector and fermion fields on a bouncing brane with a decreasing warp factor in a string-like defect

L. J. S. Sousa, C. A. S. Silva, D. M. Dantas, C. A. S. Almeida

备注：: 15 pages, 5 figures. To appear in Physics Letters B. arXiv admin note: text overlap with arXiv:1209.6016
DOI：: 10.1016/j.physletb.2014.02.010

摘要：

在最近的工作中，提出了一个模型，其中膜是由一个具有反弹型配置的标量场组成，并嵌入在一个具有弦状度规的体块中。该模型产生了一个AdS方案，其中能量动量张量的分量是有限的，并且通过适当选择反弹配置来确保其正性。在目前的工作中，我们研究的问题，规范和费米子场的本地化在这种情况下。与五维情形相反，这里的规范场是定域的，没有玻色子的贡献。然而，值得注意的是，费米子场的局域化依赖于引入与规范场的角分量的最小耦合，这与五维情形明显不同。此外，我们进行了定性分析的费米子质量模式，并得出结论，只有左手费米子可以在膜定域。

英文摘要：

In a recent work, a model has been proposed where a brane is made of a scalar field with bounce-type configurations and embedded in a bulk with a string-like metric. This model produces an AdS scenario where the components of the energy momentum tensor are finite and have its positivity ensured by a suitable choice of the bounce configurations. In the present work, we study the issue of gauge and fermion field localization in this scenario. In contrast with the five dimensional case here the gauge field is localized without the dilaton contribution. Nevertheless, it is remarkable that the localization of the fermion field depends on the introduction of a minimal coupling with the angular component of the gauge field, which differs clearly from five dimensional scenarios. Furthermore, we perform a qualitative analysis of the fermionic massive modes and conclude that only left handed fermions could be localized in the brane.

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摘要：

英文摘要：

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