Relic density of dark matter in brane world cosmology

Journal Article · Fri Oct 15 00:00:00 EDT 2004 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PhysRevD.70.083531· OSTI ID:20705465

Okada, Nobuchika ^[1]; Seto, Osamu ^[2]

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1. Theory Division, KEK, Oho 1-1, Tsukuba, Ibaraki 305-0801 (Japan)
2. Institute of Physics, National Chiao Tung University, Hsinchu, Taiwan (China)

We investigate the thermal relic density of cold dark matter in the context of brane world cosmology. Since the expansion law in a high energy regime is modified from the one in the standard cosmology, if the dark matter decouples in such a high energy regime its relic number density is affected by this modified expansion law. We derive analytic formulas for the number density of dark matter. It is found that the resultant relic density is characterized by the 'transition temperature' at which the modified expansion law in brane world cosmology is connecting with the standard one, and can be considerably enhanced compared to that in the standard cosmology, if the transition temperature is low enough.

• OSTI ID: 20705465
• Journal Information: Physical Review. D, Particles Fields, Vol. 70, Issue 8; Other Information: DOI: 10.1103/PhysRevD.70.083531; (c) 2004 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
COSMOLOGY
DENSITY
MEMBRANES
NONLUMINOUS MATTER
QUANTUM FIELD THEORY