LHC diphoton resonance at 750 GeV as an indication of SU(3)L x U(1)X electroweak symmetry

The LHC collaborations ATLAS and CMS recently reported on the excess of the events in the diphoton final states at the invariant mass of about 750 GeV. In this article we speculate on the possibility that the excess arises from the neutral CP-even component phi of the scalar triplet Phi of the SU(3)(c) x SU(3)(L) x U(1)(X) (3-3-1) model that has a U(1)(X) charge equal to X = -1/3 and acquires a vacuum expectation value larger than the electroweak symmetry breaking scale. The interactions of the scalar field phi with the photon and gluon pairs are mediated by the virtual vector-like fermions which appear as components of the anomaly-free chiral fermion representations of the 3-3-1 gauge group.