Flavor structure and coupling selection rule from intersecting D-branes

Details Flavor structure and coupling selection rule from intersecting D-branes Flavor structure and coupling selection rule from intersecting D-branes

2005-04-04

arxiv.org/abs/hep-th/0504019v1

Phys.Rev. D72 (2005) 086003

Physics

High Energy Physics

High Energy Physics - Theory

28 pages, latex, 5 figures

Scientific paper

10.1103/PhysRevD.72.086003

We study flavor structure and the coupling selection rule in intersecting D-brane configurations. We formulate the selection rule for Yukawa couplings and its extensions to generic n-point couplings. We investigate the possible flavor structure, which can appear from intersecting D-brane configuration, and it is found that their couplings are determined by discrete abelian symmetry. Our studies on the flavor structure and the coupling selection rule show that the minimal matter content of the supersymmetric standard model would have difficulty to derive realistic Yukawa matrices from stringy 3-point couplings at the tree-level. However, extended models have a richer structure, leading to non-trivial mass matrices.

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