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The chiral anomaly provides a smoking-gun evidence of a new confining gaugetheory. Motivated by a reported event excess in a diphoton invariant massdistribution at the LHC, we discuss a scenario that a pseudo-Nambu-Goldstone(pNG) boson of a new QCD-like theory is produced by gluon fusion and decaysinto a pair of the standard model gauge bosons. Despite the strong dynamics,the production cross section and the decay widths are determined by anomalymatching condition. The excess can be explained by the pNG boson with mass ofaround 750 GeV. The model also predicts exotic hadrons such as a color octetscalar and baryons. Some of them are within the reach of the LHC experiment.

Footprints of New Strong Dynamics via Anomaly and the 750 GeV Diphoton