Di-photon resonance and Dark Matter as heavy pions

Abstract

We analyse confining gauge theories where the 750 GeV di-photon resonance is a composite techni-pion that undergoes anomalous decays into SM vectors. These scenarios naturally contain accidentally stable techni-pions Dark Matter candidates. The di-photon resonance can acquire a larger width by decaying into Dark Matter through the CP-violating $\theta$-term of the new gauge theory reproducing the cosmological Dark Matter density as thermal relic.

30 pages, 3 figures, 4 tables. v3: final version, updated including Moriond data

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Cited by in corpus (12)

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• Cosmological constraints on Dark Matter models for collider searches
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