2020/03/31 by Geoff Beck · 5 citations
Physics and Astronomy · #Astronomy #Astrophysics #Astrophysics and Cosmic Phenomena #Coma Cluster #Cosmology #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Dark energy #Dark matter #Dark matter halo #Galaxy #Galaxy cluster #Hot dark matter #Light dark matter #Milky Way #Mixed dark matter #Particle physics #Physics #Scalar field dark matter #astro-ph.HE #hep-ph
paper · pdf · doi:10.1088/1475-7516/2021/02/007
published in Journal of Cosmology and Astroparticle Physics 2021(02), 007 (Institute of Physics) · 16 pages, 5 figures
openalex created_date 2020/03/27 · arxiv created 2020/12/14 · openalex publication_date 2021/02/05 · arxiv updated 2021/02/17 · openalex updated_date 2026/08/06
A Bose-Einstein condensate of the hexaquark particle known as d * (2380) has been recently proposed as a dark matter candidate by the authors in Bashkanov & Watts 2020. This particle can produced in an abundant condensate state in the early universe and is argued to satisfy all the stability and weak interaction constraints of a viable dark matter candidate. This dark matter candidate is able to evade direct detection bounds and is suggested to have the best observational prospects in the form of indirect astrophysical emissions due to the decay of the d * condensate. In this work we test the indirect observational prospects of this form of dark matter and find that its low mass ∼ 2 GeV mean that sub-GeV gamma-rays searches have the best prospects in the Milky-Way galactic centre where we find Γ d * < 3.9 × 10 −24 s −1 , with current extra-galactic data from M31 and the Coma cluster producing constraints on the d * decay rate two orders of magnitude weaker. In dwarf galaxies we show that the future GAMMA-400 instrument has the potential to probe down to Γ d * ∼ 10 −25 s −1 with 4 years of exposure time.