Abstract
We explore an extension of the Standard Model by an additional U(1) gauge group and a complex scalar Higgs portal. As the scalar is charged under this gauge factor this simple model supplies a vector dark matter candidate satisfying the observed relic abundance and limits from direct dark matter searches. An additional Higgs-like state, that may be heavier or lighter than the observed Higgs, is present and satisfies LEP and LHC bounds whilst allowing for absolute stability of the electroweak vacuum in a range of the parameter space.
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Duch, M., Grzadkowski, B. & McGarrie, M. A stable Higgs portal with vector dark matter. J. High Energ. Phys. 2015, 162 (2015). https://doi.org/10.1007/JHEP09(2015)162
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DOI: https://doi.org/10.1007/JHEP09(2015)162