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arXiv · 1703.10103

Baryogenesis via Dark Matter-Induced Symmetry Breaking in the Early Universe

Jeremy Sakstein·Mark Trodden
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Abstract

We put forward a new proposal for generating the baryon asymmetry of the universe by making use of the dynamics of a $\mathrm{U}(1)$ scalar field coupled to dark matter. High dark matter densities cause the $\mathrm{U}(1)$ symmetry to break spontaneously so that the field acquires a large vacuum expectation value. The symmetry is restored when the density redshifts below a critical value, resulting in the coherent oscillation of the scalar field. A net $B-L$ number can be generated either via baryon number-conserving couplings to the standard model or through small symmetry-violating operators and the subsequent decay of the scalar condensate.

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Jeremy Sakstein, Mark Trodden. 2017-03-29. Baryogenesis via Dark Matter-Induced Symmetry Breaking in the Early Universe. https://doi.org/10.1016/j.physletb.2017.09.059

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