Scientific American: The importance of this result is clear to everybody working in the field and it has immediately triggered a huge amount of work on the possible implications. By Michele Redi
'None of the more fundamental models that currently exist as possible replacements for the SM [Standard Model] can explain the bump. If the SM has fallen it is likely not for any reason we expected. If the new particle is real, it is absolutely unclear what might be its role in the greater scheme of things. Maybe it is related indirectly to the Higgs boson somehow, or maybe it is connected with the puzzle of dark matter in the universe. Or maybe it is just there by chance. Certainly these are questions that scientist will have to answer in the future and more data will help to understand what lies ahead.
'This is by far the most exciting thing that has happened in particle physics over the last three decades. If this hint of new physics is confirmed—something that could happen within just a few weeks, or possibly even within days—it is difficult to state the importance of such a discovery. It would be bigger than the detection of the Higgs boson, which was just confirmation of what was already known.'
750 GeV diphoton excess evidence of new particle?
"Scalar Dark Matter Explanation of Diphoton Excess at LHC" by Huayong Han, Shaoming Wang, and Sibo Zheng here