Fermion Masses and Mixing in Intersecting Branes Scenarios

Details Fermion Masses and Mixing in Intersecting Branes Scenarios Fermion Masses and Mixing in Intersecting Branes Scenarios

2003-09-15

arxiv.org/abs/hep-ph/0309169v2

Phys.Rev. D69 (2004) 095011

Physics

High Energy Physics

High Energy Physics - Phenomenology

21 pages, latex, matches the Phys. Rev. D version

Scientific paper

10.1103/PhysRevD.69.095011

We study the structure of Yukawa couplings in intersecting D6-branes wrapping a factorizable 6-torus compact space T^6. Models with MSSM-like spectrum are analyzed and found to fail in predicting the quark mass spectrum because of the way in which the family structure for the left-handed, right-handed quarks and, eventually, the Higgses is `factorized' among the different tori. In order to circumvent this, we present a model with three supersymmetric Higgs doublets which satisfies the anomaly cancellation condition in a more natural way than the previous models, where quarks were not treated universally regarding their branes assignments, or some particular branes were singled out being invariant under orientifold projection. In our model, the family structures for the left, right quarks, left leptons and the Higgses arise from one of the tori and can naturally lead to universal strength Yukawa couplings which accommodate the quark mass hierarchy and the mixing angles.

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