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Light scalar dark matter coupled to a trace of energy-momentum tensor
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We consider dark matter represented by the light scalar field whose coupling to the ordinary matter is extremely suppressed. We assume that this interaction can be described as the coupling of the square of the field to the energy-momentum tensor. We study the effect of this interaction on the evolution of dark matter scalar, as well as bounds on the model parameters that come from the variation of fundamental constants at the BBN.
Forward citations
Cited by 2 Pith papers
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Earth screening of quadratically coupled ultralight dark matter produces a multi-band frequency structure in the induced force whose sideband amplitudes vary annually, enabling improved constraints from MICROSCOPE and...
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Big Bang Nucleosynthesis Hunts Chameleon Dark Matter
Scalaron dark matter in R²-corrected F(R) gravity satisfies current BBN helium bounds and yields a new bound α ≲ 2×10^5 GeV^-2 on the R² coupling.
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