This result should be taken with a large chunk of NaCl until the analysis is internally approved by the collaboration and peer reviewed. Although it's been a while since I got my Ph.D. in experimental particle physics, I do remember that di-photon data sets are subject to significant sources of background from a variety of decay processes that produce one photon + a jet of hadrons, 2 jets, a Z boson decaying to electrons etc. Accurately filtering out and estimating the purity of the data sample is crucial, particularly when claiming the discovery of a new particle. My money is on a some combination of a statistical fluctuation, an inaccurately modeled background, or mis-estimated systematic uncertainty that is creating an artificial "bump." I look forward to being proven wrong and hope that ATLAS and CMS discover something so that high-energy physics doesn't go down in the dustbin of history because it's gotten too bloated and expensive to sustain.

Thank you. This stuff fascinates me but it can certainly be overwhelming at times.