Topological Dark Matter in the Little Higgs Models

Understand

We show that certain little Higgs models with symmetry breaking SU(N) -> SO(N) for N >= 4 admit topologically stable solitons that may contribute to cosmological dark matter.

• We have constructed a spherically symmetric soliton and estimated its mass in the case of SU(5) -> SO(5).
• Its lower bound is found to be around 10.3 TeV.
• Whether this particle is a fermion or a boson depends on the value of an integer-valued parameter of the underlying theory, analogous to the number of colors of QCD.