The 750 GeV Diphoton excess, Dark Matter and Constraints from the IceCube experiment

Understand

Recent LHC data show hints of a new resonance in the diphoton distribution at an invariant mass of 750 GeV.

• Interestingly, this new particle might be both CP odd and play the role of a portal into the dark matter sector.
• Under these assumptions and motivated by the fact that the requirement of $SU(2)_L$ invariance automatically implies the coupling of this alleged new resonance to $ZZ$ and $Z\gamma$, we investigate the current and future constraints coming from the indirect searches performed through the neutrino telescope IceCube.
• We show that these constraints can be stronger than the ones from direct detection experiments if the dark matter mass is larger than a few hundred GeV.