Observational Properties of Feebly Coupled Dark Matter
Heikinheimo, M., Tenkanen, T., Tuominen, K., & Vaskonen, V. (2017). Observational Properties of Feebly Coupled Dark Matter. In ICHEP2016 : Proceedings of the 38th International Conference on High Energy Physics (pp. 825). PoS Proceedings of Science, ICHEP2016. SISSA. Retrieved from https://pos.sissa.it/archive/conferences/282/825/ICHEP2016_825.pdf
Published inPoS Proceedings of Science;ICHEP2016
© by the Author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0).
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 λhsΦ†Φs 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 λss 4 . For example, for dark matter mass ms = 10 MeV and Hubble scale during cosmic inflation H∗ = 1012 GeV, we find 10−4 . λs . 0.2.
Is part of publicationICHEP2016 : Proceedings of the 38th International Conference on High Energy Physics