Astrophysical constraints on decaying dark gravitons
Jamie A. P. Law-Smith, Georges Obied, Anirudh Prabhu, Cumrun Vafa
Abstract
A bstract In the dark dimension scenario, which predicts an extra dimension of micron scale, dark gravitons (KK modes) are a natural dark matter candidate. In this paper, we study observable features of this model. In particular, their decay to standard matter fields can distort the CMB and impact other astrophysical signals. Using this we place bounds on the parameters of this model. In particular we find that the natural range of parameters in this scenario is consistent with these constraints and leads to the prediction that the mean mass of the dark matter today is close to a few hundred keV and the effective size of the extra dimension is around 1–30 μm.
Topics & Concepts
GravitonDark matterPhysicsDimension (graph theory)Cosmic microwave backgroundObservableAstrophysicsScalar field dark matterDark fluidHot dark matterRange (aeronautics)Cold dark matterParticle physicsDark energyCosmologyAstronomyGravitationQuantum mechanicsAnisotropyPure mathematicsMathematicsMaterials scienceComposite materialCosmology and Gravitation TheoriesGalaxies: Formation, Evolution, PhenomenaRadio Astronomy Observations and Technology