  Motivated by the recent indications for a 750 GeV resonance in the di-photon
final state at the LHC, in this work we analyse the compatibility of the excess
with the broad photon excess detected at the Galactic Centre. Intriguingly, by
analysing the parameter space of an effective models where a 750 GeV
pseudoscalar particles mediates the interaction between the Standard Model and
a scalar dark sector, we prove the compatibility of the two signals. We show,
however, that the LHC mono-jet searches and the Fermi LAT measurements strongly
limit the viable parameter space. We comment on the possible impact of cosmic
antiproton flux measurement by the AMS-02 experiment.
