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arXiv 0704.1855hep-th
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真实相交膜模型中隐藏扇区的变化

Variations of the Hidden Sector in a Realistic Intersecting Brane Model

Ching-Ming Chen, Tianjun Li, V. E. Mayes, Dimitri V. Nanopoulos

摘要:

最近,我们讨论了第一个唯象现实相交D 6-膜模型的例子。在这个模型中,隐扇区的规范对称性为USp(2)_1 × USp(2)_2 × USp(2)_3 × USp(2)_4。然而,我们发现USp(2)_1 x USp(2)_2规范对称性可以用U(2)_{12}规范对称性代替,和/或USp(2)_3 x USp(2)_4规范对称性可以用U(2)_{34}规范对称性代替,因为D 6-膜的USp(2)^2堆叠与U(2)堆叠贡献了相同的Ramond-Ramond蝌蚪。因此,存在三个非等价的隐扇区变体,并且对应的规范对称性分别是U(2)_{12} x USp(2)_3 x USp(2)_4、U(2)_{34} x USp(2)_1 x USp(2)_2和U(2)_{12} x U(2)_{34}。此外,我们还研究了隐扇形规范对称性破缺,讨论了如何使附加奇异粒子去耦,并简要地评述了唯象结果。

英文摘要:

Recently, we discussed the first example of a phenomenologically realistic intersecting D6-brane model. In this model, the gauge symmetry in the hidden sector is USp(2)_1 x USp(2)_2 x USp(2)_3 x USp(2)_4. However, we find that the USp(2)_1 x USp(2)_2 gauge symmetry can be replaced by an U(2)_{12} gauge symmetry, and/or the USp(2)_3 x USp(2)_4 gauge symmetry can be replaced by an U(2)_{34} gauge symmetry since the USp(2)^2 stacks of D6-branes contribute to the same Ramond-Ramond tadpoles as those of the U(2) stacks. Thus, there are three non-equivalent variations of the hidden sector, and the corresponding gauge symmetries are U(2)_{12} x USp(2)_3 x USp(2)_4, U(2)_{34} x USp(2)_1 x USp(2)_2, and U(2)_{12} x U(2)_{34}, respectively. Moreover, we study the hidden sector gauge symmetry breaking, discuss how to decouple the additional exotic particles, and briefly comment on the phenomenological consequences.

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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