Proton Stability, Dark Matter and Light Color Octet Scalars in Adjoint SU(5) Unification

Abstract

The unification of gauge interactions in the context of Adjoint SU(5) and its phenomenological consequences are investigated. We show the allowed mass spectrum of the theory which is compatible with proton decay, and discuss the possibility to have a cold dark matter candidate. Due to the upper bounds on the proton decay partial lifetimes, tau (p --> K^+ nubar) < 9.3 10^{36} years and tau(p --> pi^+ nubar) < 3.0 10^{35} years, the theory could be tested at future proton decay experiments. The theory predicts also light scalar color octets which could be produced at the Large Hadron Collider.

20 pages, 8 figures, minor corrections, one reference added, to appear in Physical Review D

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• Fermion mixings vs d=6 proton decay
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• Supersymmetric Adjoint SU(5)
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• Light color octet scalars in the minimal SO(10) grand unification
• Light Octet Scalars, a Heavy Higgs and Minimal Flavour Violation
• Grand Unification and Light Color-Octet Scalars at the LHC
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• Renormalizable SU(5) Unification
• Higgs Uncovering Light Scalar Remnants of High Scale Matter Unification
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• Baryogenesis via Leptogenesis in Adjoint SU(5)
• The QCD Axion and Unification
• Adjoint $SU(5)$ GUT model with $T_7$ flavor symmetry
• Flavor unification, dark matter, proton decay and other observable predictions with low-scale $S_4$ symmetry
• Enhancement of H -> gamma gamma in SU(5) model with 45_H plet
• Same-Sign Dileptons from Colored Scalars in the Flavorful Top-Coloron Model
• Colored scalar particles production in $pp$-collisions and possible mass limits for scalar gluons from future LHC data
• The minimal adjoint-SU(5)xZ_4 GUT model
• Matter Parity Violating Dark Matter Decay in Minimal SO(10), Unification, Vacuum Stability and Verifiable Proton Decay
• Anatomy of scalar mediated proton decays in $SO(10)$ models
• Flavor physics in SU(5) GUT with scalar fields in the 45 representation
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• SU(5) Octet Scalar at the LHC
• Freed Leptogenesis
• Study of non-minimal SUSY SU(5) model with realistic fermion sectors
• What is the minimal supersymmetric Standard Model from F-theory?
• A simple SU(5) model with unification near the Planck scale
• SU(5) unification of two triplet seesaw and leptogenesis with dark matter and vacuum stability
• Octetonium at the LHC
• Exploring flavour space of an economical SU(5) GUT in future proton decay measurements
• Question for SU(5) x SU(5) string unification