The Higgs boson and dark matter higgson in an extended Higgs sector

There are 3 kinds of particles in the Standard Model of particle physics: spin 1/2 fermions, beginning with the discovery of the electron by Thomson in 1897, but now extended to 6 quarks and 6 leptons; spin 1 bosons, beginning with the proposal of the photon by Einstein in 1905, but now extended to include a total of at least 12 gauge bosons; and spin 0 bosons, beginning with the discovery of the Higgs in 2012. We will describe a proposal for how this last sector should also be extended, to include both complex Higgs fields and real higgson fields. The lowest mass higgson is stable, because it has only second-order couplings to W and Z bosons, and it is therefore a dark matter candidate. Its cross-sections are relatively small for direct, indirect, and collider detection, but still within reach of current and planned experiments.