Dark matter as the signal of grand unification
- National Institute of Chemical Physics and Biophysics, Ravala 10, Tallinn 10143 (Estonia)
We argue that the existence of dark matter (DM) is a possible consequence of grand unification (GUT) symmetry breaking. In GUTs like SO(10), discrete Z{sub 2} matter parity (-1){sup 3(B-L)} survives despite broken B-L, and group theory uniquely determines that the only possible Z{sub 2}-odd matter multiplets belong to representation 16. We construct the minimal nonsupersymmetric SO(10) model containing one scalar 16 for DM and study its predictions below M{sub G}. We find that electroweak symmetry breaking occurs radiatively due to DM couplings to the standard model Higgs boson. For thermal relic DM the mass range M{sub DM}{approx}O(0.1-1) TeV is predicted by model perturbativity up to M{sub G}. For M{sub DM}{approx}O(1) TeV to explain the observed cosmic ray anomalies with DM decays, there exists a lower bound on the spin-independent direct detection cross section within the reach of planned experiments.
- OSTI ID:
- 21325410
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 80, Issue 8; Other Information: DOI: 10.1103/PhysRevD.80.085020; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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