2008/01/31 by Eung Jin Chun, Hang Bae Kim, Kazunori Kohri +1 · 1 citation
Physics and Astronomy · #Astrophysics #Big Bang nucleosynthesis #Cold dark matter #Cosmology #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Dark energy #Dark matter #Gravitino #Hot dark matter #Lightest Supersymmetric Particle #Minimal Supersymmetric Standard Model #Nuclear physics #Nucleosynthesis #Particle physics #Particle physics theoretical and experimental studies #Physics #Spontaneous symmetry breaking #Supergravity #Superpartner #Supersymmetry #Supersymmetry breaking #Symmetry breaking #Warm dark matter #astro-ph #hep-ph
paper · pdf · doi:10.1088/1126-6708/2008/03/061
published as JHEP0803:061,2008 · 9 pages, 4 figures, to appear in JHEP
arxiv created 2008/03/20 · openalex publication_date 2008/03/25 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
If the spontaneous breaking of Peccei-Quinn symmetry comes from soft supersymmetry breaking, the fermionic partners of the symmetry-breaking fields have mass of order the gravitino mass, and are called flatinos. The lightest flatino, called here the flaxino, is a CDM candidate if it is the lightest supersymmetric particle. We here explore flaxino dark matter assuming that the lightest ordinary supersymmetric particle is the stau, with gravity-mediated supersymmetry breaking. The decay of the stau to the flaxino is fast enough not to spoil the standard predictions of Big Bang Nucleosynthesis, and its track and decay can be seen in future colliders.