Electroweak symmetry breaking and cold dark matter from strongly interacting hidden sector

Abstract

We consider a hidden sector with a vectorlike confining gauge theory like QCD with $N_{h,c}$ colors and $N_{h,f}$ light quarks ${\mathcal{Q}}_h$ in the hidden sector. Then a scale ${\Lambda }_H$ would be generated by dimensional transmutation, and chiral symmetry breaking occurs in the hidden sector. This scale ${\Lambda }_H$ can play a role of the SM Higgs mass parameter, triggering electroweak symmetry breaking (EWSB). Furthermore the lightest mesons in the hidden sector is stable by flavor conservation of the hidden sector strong interaction, and could be a good cold dark matter (CDM). We study collider phenomenology, and relic density and direct detection rates of the CDM of this model.

The version which appeared in Phys. Lett. B

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