Yukawa Corrections from Four-Point Functions in Intersecting D6-Brane Models

Abstract

We discuss corrections to the Yukawa matrices of the Standard Model (SM) fermions in intersecting D-brane models due to four-point interactions. Recently, an intersecting D-brane model has been found where it is possible to obtain correct masses and mixings for all quarks as well as the tau lepton. However, the masses for the first two charged leptons come close to the right values but are not quite correct. Since the electron and muon are quite light, it is likely that there are additional corrections to their masses which cannot be neglected. With this in mind, we consider contributions to the SM fermion mass matrices from four-point interactions. In an explicit model, we show that it is indeed possible to obtain the SM fermion masses and mixings which are a better match to those resulting from experimental data extrapolated at the unification scale when these corrections are included. These corrections may have broader application to other models.

24 pages, 4 figures

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• Finite Temperature behavior of the CPT-even and parity-even electrodynamics of the Standard Model Extension
• Stringy Instantons and Yukawa Couplings in MSSM-like Orientifold Models
• The Supersymmetric Standard Models with a Pseudo-Dirac Gluino from Hybrid $F-$ and $D-$Term Supersymmetry Breakings
• The Supersymmetry Breaking Soft Terms, and Fermion Masses and Mixings in the Supersymmetric Pati-Salam Model from Intersecting D6-branes
• The Complete Search for the Supersymmetric Pati-Salam Models from Intersecting D6-Branes
• Fermion masses and mixings in the supersymmetric Pati-Salam landscape from Intersecting D6-Branes
• Aspects of the gauge boson-gaugino mixing in a supersymmetric scenario with Lorentz-symmetry violation
• Realistic Four-Generation MSSM in Type II String Theory
• All Fermion Masses and Mixings in an Intersecting D-brane World
• Four-Family $\mathcal{N}=1$ Supersymmetric Pati-Salam Models from Intersecting D6-Branes
• Natural Four-Generation Mass Textures in MSSM Brane Worlds
• The Classical Solution for the Bosonic String in the Presence of Three D-branes Rotated by Arbitrary SO(4) Elements
• MSSM-like AdS Flux Vacua with Frozen Open-string Moduli