Journal of High Energy Physics

, 2019:159 | Cite as

Forbidden frozen-in dark matter

  • L. Darmé
  • A. Hryczuk
  • D. KaramitrosEmail author
  • L. Roszkowski
Open Access
Regular Article - Theoretical Physics


We examine and point out the importance of a regime of dark matter pro- duction through the freeze-in mechanism that results from a large thermal correction to a decaying mediator particle mass from hot plasma in the early Universe. We show that mediator decays to dark matter that are kinematically forbidden at the usually considered ranges of low temperatures can be generically present at higher temperatures and actually dominate the overall dark matter production, thus leading to very distinct solutions from the standard case. We illustrate these features by considering a dark Higgs portal model where dark matter is produced via decays of a scalar field with a large thermal mass. We identify the resulting ranges of parameters that are consistent with the correct dark matter relic abundance and further apply current and expected future collider, cosmological, and astrophysical limits.


Cosmology of Theories beyond the SM Beyond Standard Model 


Open Access

This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited


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Copyright information

© The Author(s) 2019

Authors and Affiliations

  1. 1.National Centre for Nuclear ResearchWarsawPoland
  2. 2.Astrocent, Nicolaus Copernicus Astronomical Center Polish Academy of SciencesWarsawPoland

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