Journal of High Energy Physics

, 2018:37 | Cite as

Singlet-Doublet dark matter freeze-in: LHC displaced signatures versus cosmology

  • Lorenzo CalibbiEmail author
  • Laura Lopez-Honorez
  • Steven Lowette
  • Alberto Mariotti
Open Access
Regular Article - Theoretical Physics


We study the Singlet-Doublet dark matter model in the regime of feeble couplings, where the dark matter abundance is obtained via the freeze-in mechanism. As a consequence of the small couplings, the heavier particles in the model are long-lived with decay length at typical scales of collider experiments. We analyse the collider signatures of the model, characterised by displaced h and Z bosons plus missing momentum, employing current LHC searches for displaced vertices and missing energy to significantly constrain the parameter space of the model. We also take into account the cosmological bounds relevant for our light dark matter candidate arising from Lyman-α forest constraints. Our analysis emphasises the interplay between displaced signatures at the LHC and cosmology for dark matter candidates whose relic abundance is obtained through the freeze-in mechanism.


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) 2018

Authors and Affiliations

  • Lorenzo Calibbi
    • 1
    Email author
  • Laura Lopez-Honorez
    • 2
    • 3
  • Steven Lowette
    • 4
  • Alberto Mariotti
    • 3
    • 4
  1. 1.CAS Key Laboratory of Theoretical Physics, Institute of Theoretical PhysicsChinese Academy of SciencesBeijingP.R. China
  2. 2.Service de Physique ThéoriqueUniversité Libre de BruxellesBrusselsBelgium
  3. 3.Theoretische NatuurkundeVrije Universiteit BrusselBrusselsBelgium
  4. 4.Inter-University Institute for High EnergiesVrije Universiteit BrusselBrusselsBelgium

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