Decaying Superheavy Dark Matter and Subgalactic Structure of the Universe

Details Decaying Superheavy Dark Matter and Subgalactic Structure of the Universe Decaying Superheavy Dark Matter and Subgalactic Structure of the Universe

2003-06-22

arxiv.org/abs/astro-ph/0306437v3

Phys.Lett.B594:1-7,2004

Astronomy and Astrophysics

Astrophysics

5 pages, 1 figure. Add a new paragraph on the production of UHECR. References added. Final version which is to appear in Phys.

Scientific paper

10.1016/j.physletb.2004.04.082

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.

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