We show that the baryon–dark-matter coincidence problem can be solved in the constrained minimal supersymmetric model. Baryons and dark matter are generated simultaneously through the late-time decay of nontopological solitons, Q-balls, which are formed after the Affleck-Dine baryogenesis. A certain relation between the universal scalar mass $m_0$ and the universal gaugino mass $M_{1/2}$ is required to solve the coincidence problem, marginally depending on the other parameters, and the result can be consistent with the observation of the 126-GeV Higgs boson. We also investigate the detectability in dark-matter direct-search experiments.

• Received 4 June 2014

DOI:https://doi.org/10.1103/PhysRevD.91.081301