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arXiv · 0704.1855

Variations of the Hidden Sector in a Realistic Intersecting Brane Model

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

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.

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Ching-Ming Chen, Tianjun Li, V. E. Mayes, Dimitri V. Nanopoulos. 2007-04-15. Variations of the Hidden Sector in a Realistic Intersecting Brane Model. https://doi.org/10.1088/0954-3899%2F35%2F9%2F095008

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