A multicomponent dark matter scenario which is consistent with the antiproton observations of AMS-02

We have proposed a dark matter scenario [1] with two stable WIMPs (weakly interacting massive particles) -- the neutralino predicted by supersymmetry and a new particle resulting from an extended Higgs sector, which we have called the Higgson $H$ to distinguish it from the Higgs boson $h$ and the Higgsino $\tilde{h}$. The Higgson is rigorously predicted to have a mass of $\le 125$ GeV/c$^2$, and this prediction is consistent with the antiproton observations of AMS-02 [2,3] which provide evidence at the 3-5 $\sigma$ level for a dark matter particle with a mass near 100 GeV or below. [1] Dylan Blend, Reagan Thornberry, Alejandro Arroyo, Gabriel Frohaug, Caden LaFontaine, and Roland E Allen, "A multicomponent dark matter scenario and the experimental evidence supporting it'', submitted. [2] Ilias Cholis, Tim Linden, and Dan Hooper, "A Robust Excess in the Cosmic-Ray Antiproton Spectrum: Implications for Annihilating Dark Matter", Phys. Rev. D 99, 103026 (2019), arXiv:1903.02549 [astro-ph.HE]. [3] Alessandro Cuoco, Jan Heisig, Lukas Klamt, Michael Korsmeier, and Michael Krämer, "Scrutinizing the evidence for dark matter in cosmic-ray antiprotons", Phys. Rev. D 99, 103014 (2019), arXiv:1903.01472 [astro-ph.HE].