# Di-photon resonance and Dark Matter as heavy pions

**Authors:** Michele Redi, Alessandro Strumia, Andrea Tesi, Elena Vigiani  
**arXiv:** [1602.07297](https://arxiv.org/abs/1602.07297)  
**Date:** 2016-02-23  
**Summary page:** https://www.summarizepaper.com/en/paper/1602.07297v3/

## 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.