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APS » Journals » Phys. Rev. Lett. » Volume 82 » Issue 15
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Phys. Rev. Lett. 82, 3016–3019 (1999)

Cold and Hot Dark Matter from a Single Nonthermal Relic

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Ram Brustein*
Department of Physics, Ben-Gurion University, Beer-Sheva 84105, Israel

Merav Hadad†
School of Physics and Astronomy, Beverly and Raymond Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69978, Israel

Received 29 October 1998; published in the issue dated 12 April 1999

The origin of dark matter in the Universe may be scalar particles produced by amplification of quantum fluctuations during a period of dilaton-driven inflation. We show, for the first time, that a single species of such particles, depending on its mass and interactions, can be a source of both cold and hot dark matter simultaneously. Detection of such weakly interacting particles with masses below a fraction of an eV presents a new challenge for dark matter searches.

© 1999 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.82.3016
DOI:
10.1103/PhysRevLett.82.3016
PACS:
95.35.+d, 11.25.Mj, 98.80.Cq

*Email address: ramyb@bgumail.bgu.ac.il

†Email address: meravv@post.tau.ac.il

 
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