Cosmology with a dynamically screened scalar interaction in the dark sector
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Motivated in part by string theory, we consider a modification of the LambdaCDM cosmological model in which the dark matter has a long-range scalar force screened by light particles. Scalar forces can have interesting effects on structure formation: the main example presented here is the expulsion of dark matter halos from low density regions, or voids, in the galaxy distribution.
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Cited by 2 Pith papers
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Mesogenesis through the Ephemeral Dark Decay of Beauty
An ultralight scalar enables temporary dark decays of B mesons in the early universe via muon-induced mass shifts of a dark fermion, allowing mesogenesis while remaining compatible with modern flavor constraints.
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Mesogenesis through the Ephemeral Dark Decay of Beauty
An ultralight scalar temporarily lowers a dark fermion mass via muon thermal density, opening efficient B meson dark decays for baryon asymmetry generation that later shuts off to match flavor data.
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