Electroweak cogenesis


We propose a simple renormalizable model of baryogenesis and asymmetric dark matter generation at the electroweak phase transition. Our setup utilizes the two Higgs doublet model plus two complex gauge singlets, the lighter of which is stable dark matter. The dark matter is charged under a global symmetry that is broken in the early universe but restored during the electroweak phase transition. Because the ratio of baryon and dark matter asymmetries is controlled by model parameters, the dark matter need not be light. Thus, new force carriers are unnecessary and the symmetric dark matter abundance can be eliminated via Higgs portal interactions alone. Our model places a rough upper bound on the dark matter mass, and has implications for direct detection experiments and particle colliders.

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Correspondence to Yue Zhang.

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ArXiv ePrint: 1306.4321

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Cheung, C., Zhang, Y. Electroweak cogenesis. J. High Energ. Phys. 2013, 2 (2013). https://doi.org/10.1007/JHEP09(2013)002

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  • Cosmology of Theories beyond the SM
  • CP violation
  • Global Symmetries