LHC diphoton excess from colorful resonances

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Motivated by the possible diphoton excess around 750 GeV observed by ATLAS and CMS at 13 TeV, we consider a coloron model from SU(3)₁ × SU(3)₂ spontaneously breaking to the Standard Model SU(3)C. A colored massive vector boson is resonantly produced by q q in proton collision, followed by a colored scalar cascade decay. This process gives two photons and one jet in the final states. And the kinetic edge of the two photons can be an interpretation of the diphoton excess, while satisfying the dijet, tt, jet+photon resonance constraints. In this model, due to the large mass of vector resonance, the parton luminosity function ratio between 13 TeV and 8 TeV can be quite large. Therefore, the diphoton excess has not been observed at 8 TeV search. On the other hand, having all the new particles color-charged around TeV, this model predicts new signals at the LHC, which can be validated soon.