How heavy can neutralino dark matter be?

  • Hajime FukudaEmail author
  • Feng Luo
  • Satoshi Shirai
Open Access
Regular Article - Theoretical Physics


What is the upper limit of the mass of the neutralino dark matter whose thermal relic is consistent with the observation? If the neutralino dark matter and colored sparticles are extremely degenerated in mass, with a mass difference less than the QCD scale, the dark matter annihilation is significantly increased and enjoys the “second freeze-out” after the QCD phase transition. In this case, the neutralino dark matter with a mass much greater than 100 TeV can realize the correct dark matter abundance. We study the dark matter abundance and its detection in the case of such highly degenerated mass spectrum of the neutralino dark matter and colored supersymmetric particles.


Beyond Standard Model Supersymmetric Standard Model 


Open Access

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© The Author(s) 2019

Authors and Affiliations

  1. 1.Kavli Institute for the Physics and Mathematics of the Universe (WPI)The University of Tokyo Institutes for Advanced Study, The University of TokyoKashiwaJapan
  2. 2.School of Physics and AstronomySun Yat-sen UniversityZhuhaiChina

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