Composite self-interacting dark matter and Higgs

Abstract

We propose a novel mechanism in composite models that provides self-interacting dark matter along with the Higgs itself as composite particles, alleviating the Standard Model naturalness problem and explaining small-scale discrepancies such as the core-cusp and "too big to fail" problems. These dark matter candidates are stable due to global U(1) symmetries of the composite dynamics and their strong self-interactions are created by the novel mechanism based on top-quark partial compositeness. The relic density of the dark matter candidates is particle anti-particle symmetric and due to thermal freeze-out. We implement this mechanism in a four-dimensional gauge theory with a minimal number of fermions charged under a new confining gauge group $G_{\text{HC}}$.

12 pages, 1 figure, 1 table

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• Gravitational waves from $\mathrm{SU}($$N$$)/Sp($$N$$)$ composite Higgs models
• Electroweak precision tests of composite Higgs models