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Dibaryons cannot be the dark matter
The hypothetical $SU(3)$ flavor-singlet dibaryon state $S$ with strangeness $\ensuremath{-}2$ has been discussed as a dark-matter candidate capable of explaining the curious 5-to-1 ratio of the mass density of dark matter to that of baryons. We study the early-universe production of dibaryons and find that irrespective of the hadron abundances …