Doublet-Triplet Splitting in an SU(5) Grand Unification

Abstract

We present a new solution to the doublet-triplet splitting problem which also works in a supersymmetric SU(5) grand unified theory and is testable at TeV-scale collider experiments. In our model, the SU(5) symmetry is broken through the Hosotani mechanism. Thanks to the phase nature of the Hosotani-breaking, the "missing VEV" can be realized even in an SU(5) model. A general and distinctive prediction of this solution is the existence of light adjoint chiral supermultiplets with masses of the supersymmetry breaking scale. Though these disturb the gauge coupling unification, it can be recovered keeping the unified gauge coupling constant perturbative by introducing additional vector-like particles, which may be also observed in the upcoming collider experiments.

11 pages, no figures, minor improvements and references added

References in corpus (9)

• Improved Naturalness with a Heavy Higgs: An Alternative Road to LHC Physics
• Dirac Gauginos, Gauge Mediation and Unification
• Dark Matter in Inert Triplet Models
• Grand Gauge-Higgs Unification
• Stable Higgs Bosons as Cold Dark Matter
• Missing Partner Mechanism in SO(10) Grand Unification
• E6 grand unified theory with three generations from heterotic string
• H parity and the stable Higgs boson in the SO(5) x U(1) gauge-Higgs unification
• Heterotic E6 GUTs and Partition Functions

Cited by in corpus (12)

• Gauge Symmetry Breaking Patterns in an SU(5) Grand Gauge-Higgs Unification
• LHC signals of the $SO(5)\times U(1)$ gauge-Higgs unification
• Higgs as a Probe of Supersymmetric Grand Unification with the Hosotani Mechanism
• The B-L Phase Transition: Implications for Cosmology and Neutrinos
• Classification of Standard Model Particles in $E_6$ Orbifold Grand Unified Theories
• On representation matrices of boundary conditions in $SU(n)$ gauge theories compactified on two-dimensional orbifolds
• Mass spectrum in a six-dimensional $SU(n)$ gauge theory on a magnetized torus
• Nucleon decay via dimension-6 operators in $E_6\times SU(2{)}_F\times U(1{)}_A$ SUSY GUT model
• Dirac gaugino from grand gauge-Higgs unification
• On diagonal representatives in boundary condition matrices on orbifolds
• SU(5) Octet Scalar at the LHC
• $\mu$ term and supersymmetry breaking from six dimensional theory