Properties of Fermion Mixings in Intersecting D-brane Models
arXiv:hep-ph/0512171 · doi:10.1016/j.physletb.2006.01.007
Abstract
We consider the Yukawa couplings for quarks and leptons in the context of Pati-Salam model using intersecting D-brane models where the Yukawa coupling matrices are rank one in a simple choice of family replication. The CKM mixings can be explained by perturbing the rank 1 matrix using higher order terms involving new Higgs fields available in the model. We show that the near bi-large neutrino mixing angles can be naturally explained, choosing the light neutrino mass matrix to be type II seesaw dominant. The predicted value of U_{e3} is in the range \simeq 0.05-0.15. In the quark sector, V_{cb} is naturally close to the strange/bottom quark mass ratio and we obtain an approximate relation V_{ub} V_{cb} \simeq (m_s/m_b)^2 V_{us}. The geometrical interpretations of the neutrino mixings are also discussed.
17 pages, 3 figures
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- Probing the Green-Schwarz Mechanism at the Large Hadron Collider
- Origin of Quark-Lepton Flavor in SO(10) with Type II Seesaw
- Hidden Sector Baryogenesis
- Yukawa Corrections from Four-Point Functions in Intersecting D6-Brane Models
- Modification of the Unitarity Relation for sin2beta-Vub in Supersymmetric Models
- An Inflationary Scenario in Intersecting Brane Models
- Towards a realistic Standard Model from D-brane configurations
- The Search for a Realistic String Model at LHC
- Lepton Flavor Violation in Intersecting D-brane Models
- Nucleon decay in gauge unified models with intersecting D6-branes
- Neutrino mass and grand unification of flavor
- Mass Hierarchies from MSSM Orientifold Compactifications