SU(5) orientifolds, Yukawa couplings, Stringy Instantons and Proton Decay
arXiv:0909.0271 · doi:10.1016/j.nuclphysb.2009.12.012
Abstract
We construct a large class of SU(5) orientifold vacua with tadpole cancellation both for the standard and the flipped case. We give a general analysis of superpotential couplings up to quartic order in orientifold vacua and identify the properties of needed Yukawa couplings as well as the baryon number violating couplings. We point out that successful generation of the perturbatively forbidden Yukawa couplings entails a generically disastrous rate for proton decay from an associated quartic term in the superpotential, generated from the same instanton effects. We search for the appropriate instanton effects that generate the missing Yukawa couplings in the SU(5) vacua we constructed and find them in a small subset of them.
37 pages (v2) References added. Brief discussion of F-theory refined
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Cited by in corpus (29)
- Models of Particle Physics from Type IIB String Theory and F-theory: A Review
- Discrete gauge symmetries in D-brane models
- Exophobic Quasi-Realistic Heterotic String Vacua
- Classification of Heterotic Pati-Salam Models
- Discrete Gauge Symmetries in Discrete MSSM-like Orientifolds
- Implications of String Constraints for Exotic Matter and Z' s Beyond the Standard Model
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- The Importance of Being Rigid: D6-Brane Model Building on T6/Z2xZ6' with Discrete Torsion
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- The Weinberg Operator and a Lower String Scale in Orientifold Compactifications
- Towards the Standard Model in F-theory
- Exotic see-saw mechanism for neutrinos and leptogenesis in a Pati-Salam model
- SU(5) D-brane realizations, Yukawa couplings and proton stability
- Neutrino Masses from the Top Down
- Singlet Extensions of the MSSM in the Quiver Landscape
- Non-perturbative Vacuum Destabilization and D-brane Dynamics
- Stringy Hidden Valleys
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- TeV-Scale strings
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- Discrete symmetries from hidden sectors
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- The "landscape" of Pati--Salam heterotic superstring vacua