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. Constraining the NMSSM through GUT-scale boundary conditions only slightly affects this expectation. Our results complement earlier NMSSM studies of the galactic center excess, which link it to heavy Higgs searches at the LHC.
@article{arxiv.1507.02288,
title = {Invisible Higgs Decays to Hooperons in the NMSSM},
author = {Anja Butter and Tilman Plehn and Michael Rauch and Dirk Zerwas and Sophie Henrot-Versillé and Rémi Lafaye},
journal= {arXiv preprint arXiv:1507.02288},
year = {2016}
}