Di-photon resonance and Dark Matter as heavy pions
Authors: Michele Redi, Alessandro Strumia, Andrea Tesi, Elena Vigiani
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.
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