Decaying superheavy dark matter and subgalactic structure of the Universe

2003/06/30 by Chung-Hsien Chou, Kin‐Wang Ng, Kin-Wang Ng · 1 citation
Physics and Astronomy · #Astrophysics and Cosmic Phenomena #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #astro-ph #hep-ph

paper · pdf · doi:10.1016/j.physletb.2004.04.082

published as Phys.Lett.B594:1-7,2004 · 5 pages, 1 figure. Add a new paragraph on the production of UHECR. References added. Final version which is to appear in Phys.Lett.B

arxiv created 2004/05/03 · openalex publication_date 2004/06/11 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/31

Abstract

The collisionless cold dark matter (CCDM) model predicts overly dense cores in dark matter halos and overly abundant subhalos. We show that the idea that CDM are decaying superheavy particles which produce ultra-high energy cosmic rays with energies beyond the Greisen–Zatsepin–Kuzmin cutoff may simultaneously solve the problem of subgalactic structure formation in CCDM model. In particular, the Kuzmin–Rubakov's decaying superheavy CDM model may give an explanation to the smallness of the cosmological constant and a new thought to the CDM experimental search.

Citations

• The Core Density of Dark Matter Halos: A Critical Challenge to the ΛCDM Paradigm?
• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Preliminary Maps and Basic Results
• The Structure of Dark Matter Haloes in Dwarf Galaxies

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