Observational Properties of Feebly Coupled Dark Matter

2016/11/15 by Matti Heikinheimo, Heikinheimo, Matti, Tommi Tenkanen +5
Physics and Astronomy · #Cosmology and Nongalactic Astrophysics (astro-ph.CO) #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #astro-ph.CO #hep-ph

paper · pdf · doi:10.48550/arxiv.1611.04951

4 pages, 1 figure. Prepared for the proceedings of the ICHEP2016 conference, 3-10 August 2016, Chicago, United States

arxiv created 2016/11/15 · arxiv updated 2016/11/16

Abstract

We show that decoupled hidden sectors can have observational consequences. As a representative model example, we study dark matter production in the Higgs portal model with one real singlet scalar s coupled to the Standard Model Higgs via λ_{\rm hs}Φ^†Φs² and demonstrate how the combination of non-observation of cosmological isocurvature perturbations and astrophysical limits on dark matter self-interactions imply stringent bounds on the magnitude of the scalar self-coupling λ_{\rm s}s⁴. For example, for dark matter mass m_{\rm s}=10 MeV and Hubble scale during cosmic inflation H_*=10¹² GeV, we find 10^-4\lesssim λ_{\rm s}\lesssim 0.2.

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