Dark matter stability and unification without supersymmetry

Abstract

In the absence of low energy supersymmetry, we show that (a) the dark matter particle alone at the TeV scale can improve gauge coupling unification, raising the unification scale up to the lower bound imposed by proton decay, and (b) the dark matter stability can automatically follow from the grand unification symmetry. Within reasonably simple unified models, a unique candidate satisfying these two properties is singled out: a fermion isotriplet with zero hypercharge, member of a 45 (or larger) representation of SO(10). We discuss the phenomenological signatures of this TeV scale fermion, which can be tested in direct and indirect future dark matter searches. The proton decay rate into e^+ π^0 is predicted close to the present bound.

14 pages; several comments and references added; version published in PRD

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• Phenomenology of Dark Matter from A4 Flavor Symmetry
• Wino-like Minimal Dark Matter and future colliders
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• Monochromatic neutrinos generated by dark matter and the see-saw mechanism
• Phenomenology of left-right symmetric dark matter
• Neutrino phenomenology and stable dark matter with A4
• Hidden Charged Dark Matter and Chiral Dark Radiation
• Signatures from Scalar Dark Matter with a Vector-like Quark Mediator
• Connecting neutrino physics with dark matter
• Vacuum Stability and Radiative Electroweak Symmetry Breaking in an SO(10) Dark Matter Model
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• Capture of Electroweak Multiplet Dark Matter in Neutron Stars
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• Radiative Seesaw in SO(10) with Dark Matter
• Inverse see-saw, leptogenesis, observable proton decay and ${\Delta }_{\mathrm{R}}^{\pm \pm }$ in SUSY SO(10) with heavy W_R
• Singlet-Triplet Fermionic Dark Matter and LHC Phenomenology
• Fermion dark matter from SO(10)
• Inflation and Leptogenesis in High-Scale Supersymmetry
• A minimal non-supersymmetric SO(10) model with Peccei--Quinn symmetry
• Left-right model with TeV fermionic dark matter and unification
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• Weakly-Interacting Massive Particles in Non-supersymmetric SO(10) Grand Unified Models
• Displaced Searches for Light Vector Bosons at Belle II
• The ATLAS Diboson Resonance in Non-Supersymmetric SO(10)
• New mechanism for Type-II seesaw dominance in SO(10) with low-mass Z-prime, RH neutrinos, and verifiable LFV, LNV, and proton decay
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• Planck-scale induced left-right gauge theory at LHC and experimental tests
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• The E6 route to multicomponent dark matter
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• Dark Matter and Gauge Coupling Unification in Non-SUSY SO(10) Grand Unified Models