Galactic Center Gamma Ray Excess and Higgs Boson(s)

Original · EN

There is evidence for an excess of gamma rays with O(GeV) energy coming from the Galactic Center in data from the Fermi Telescope. The spectrum of the excess is well fit by 30 GeV dark matter annihilating into a pair of b quarks with a cross section expected from a thermal relic. For an explanation of this excess, we study a renormalizable model where dark matter couples to the SM via a pseudoscalar that mixes with the CP-odd Higgs boson of a Two HIggs Doublet Model. We report the constraints on this model from direct detection, Higgs decays, and rare B meson decays.