Invisible Higgs Decays to Hooperons in the NMSSM

Understand

The galactic center excess of gamma ray photons can be naturally explained by light Majorana fermions in combination with a pseudoscalar mediator.

• The NMSSM provides exactly these ingredients.
• We show that for neutralinos with a significant singlino component the galactic center excess can be linked to invisible decays of the Standard-Model-like Higgs at the LHC.
• We find predictions for invisible Higgs branching ratios in excess of 50 percent, easily accessible at the LHC.