Light fermionic WIMP dark matter with light scalar mediator

  • Shigeki Matsumoto
  • Yue-Lin Sming TsaiEmail author
  • Po-Yan Tseng
Open Access
Regular Article - Theoretical Physics


A light fermionic weakly interacting massive particle (WIMP) dark matter is investigated by studying its minimal renormalizable model, where it requires a scalar mediator to have an interaction between the WIMP and standard model particles. We perform a comprehensive likelihood analysis of the model involving the latest but robust constraints and those will be obtained in the near future. In addition, we pay particular attention to properly take the kinematically equilibrium condition into account. It is shown that near-future experiments and observations such as low-mass direct dark matter detections, flavor experiments and CMB observations play important roles to test the model. Still, a wide parameter region will remain even if no WIMP and mediator signals are detected there. We also show that precise Higgs boson measurements at future lepton colliders will significantly test this remaining region.


Beyond Standard Model Cosmology of Theories beyond the SM 


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

  • Shigeki Matsumoto
    • 1
  • Yue-Lin Sming Tsai
    • 2
    • 3
    Email author
  • Po-Yan Tseng
    • 1
  1. 1.Kavli IPMU (WPI), UTIASUniversity of TokyoKashiwaJapan
  2. 2.Institute of PhysicsAcademia SinicaNangangTaiwan
  3. 3.Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain ObservatoryChinese Academy of SciencesNanjingChina

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