We construct a weakly-coupled renormalizable model to explain the 750 GeV diphoton excess. The 750 GeV resonance (denoted as X(750)) is interpreted as a pseudoscalar coming from a complex singlet. The model also naturally provides a dark matter candidate. One most attractive feature of the model is that decays of X(750) are all loop-induced so the diphoton rate is not diluted by unwanted tree l...
