  We consider the phenomenology of a resonance that couples to photons but not
gluons, and estimate its production rate at the LHC from photon-photon fusion
in elastic pp scattering using the effective photon and narrow width
approximations. The rate is sensitive only to the mass, the spin, the total
width of the resonance, and its branching fraction to photons. Production cross
sections of 5-10 fb at 13 TeV can be easily accommodated for a 750 GeV
resonance with partial photon width of 15 GeV. This provides the minimal
explanation of the reported diphoton anomaly in the early LHC Run II data.
