6533b7dafe1ef96bd126ecf5
RESEARCH PRODUCT
Observational properties of feebly coupled dark matter
Tommi TenkanenMatti HeikinheimoKimmo TuominenVille Vaskonensubject
PhysicsParticle physicsCosmology and Nongalactic Astrophysics (astro-ph.CO)Dark matterHigh Energy Physics::PhenomenologyScalar field dark matterFOS: Physical sciencesAstrophysics::Cosmology and Extragalactic Astrophysicsdark matterStandard ModelHidden sectorpimeä aineHigh Energy Physics - PhenomenologyHigh Energy Physics - Phenomenology (hep-ph)Higgs bosonProduction (computer science)Light dark matterDark fluidAstrophysics - Cosmology and Nongalactic Astrophysicsdescription
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 $\lambda_{\rm hs}\Phi^\dagger\Phi s^2$ 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 $\lambda_{\rm s}s^4$. For example, for dark matter mass $m_{\rm s}=10$ MeV and Hubble scale during cosmic inflation $H_*=10^{12}$ GeV, we find $10^{-4}\lesssim \lambda_{\rm s}\lesssim 0.2$.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2016-11-15 |