Dilatonic Dark Matter

Details Dilatonic Dark Matter Dilatonic Dark Matter

1998-10-16

arxiv.org/abs/hep-ph/9810379v1

Mod.Phys.Lett. A13 (1998) 109-117

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages, 1 figure. Published in Mod. Phys. Lett A13 (1998) 109-117. This essay received an "honorable mention" from the Gravi

Scientific paper

10.1142/S0217732398000152

We study the possibility that the dilaton plays the role of the dark matter of the universe. We find that the condition for the dilaton to be the dark matter of the universe strongly restricts its mass to be around 0.5 keV or 270 MeV. For the other mass ranges, the dilaton either undercloses or overcloses the universe. The 0.5 keV dilaton has the free-streaming distance of about 1.4 Mpc and becomes an excellent candidate of a warm dark matter, while the 270 MeV one has the free-streaming distance of about 7.4 pc and becomes a cold dark matter. We discuss the possible ways to detect the dilaton experimentally.

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