2008/05/07 by Junya Kasahara, Katherine Freese, Paolo Gondolo
Physics and Astronomy · #Black Holes and Theoretical Physics #Dark Matter and Cosmic Phenomena #Dark matter #Gaugino #Higgs boson #Higgsino #Minimal Supersymmetric Standard Model #Neutralino #Particle physics #Particle physics theoretical and experimental studies #Physics #Supersymmetry #hep-ph
paper · pdf · doi:10.1103/physrevd.79.045020
published as Phys.Rev.D79:045020,2009 · 12 pages, 5 figures
arxiv created 2008/05/07 · openalex publication_date 2009/02/25 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Dark matter is examined within the ``golden region'' of the minimal supersymmetric standard model. This region satisfies experimental constraints, including a lower bound on the Higgs mass of 114 GeV, and minimizes fine-tuning of the Z boson mass. Here we impose additional constraints (particularly due to experimental bounds on b\ensuremath→s\ensuremathγ). Then we find the properties of the dark matter in this region. Neutralinos with a relic density that provides the amount of dark matter required by cosmological data are shown to consist of a predominant gaugino (rather than Higgsino) fraction. In addition, the U(1)Y gaugino mass parameter must satisfy M1\ensuremath\lesssim300 GeV.