Vacuum structure of the ℤ2 symmetric Georgi-Machacek model
Duarte Azevedo, Pedro Ferreira, Heather E. Logan, Rui Santos
Abstract
A bstract We discuss the vacuum structure of a version of the Georgi-Machecek model with an exact ℤ 2 symmetry acting on the triplet fields. Besides the usual custodial-symmetric model, with ρ = 1 at tree-level, a model with a dark matter candidate is also viable. The other phases of the model lead to electric charge breaking, a wrong pattern of electroweak symmetry breaking or to ρ ≠ 1 at tree-level. We derive conditions to have an absolute minimum in each of the two viable phases, the custodial and the dark matter phases.
Topics & Concepts
PhysicsElectroweak interactionSymmetry (geometry)Charge (physics)Dark matterStandard Model (mathematical formulation)Symmetry breakingParticle physicsTheoretical physicsSpontaneous symmetry breakingQuantum electrodynamicsElectric chargeVacuum expectation valueDiscrete symmetryFalse vacuumQuantum mechanicsVacuum stateExplicit symmetry breakingChiral symmetryPhysics beyond the Standard ModelQED vacuumElementary particleMinimal modelCosmology and Gravitation TheoriesParticle physics theoretical and experimental studiesDark Matter and Cosmic Phenomena