Constraints on Brans-Dicke cosmology with a varying {lambda} term due to the big-bang nucleosynthesis and WMAP

Journal Article · Wed Jul 12 00:00:00 EDT 2006 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2234455· OSTI ID:20877464

Nakamura, Riou; Hashimoto, Masa-aki ^[1]; Arai, Kenzo ^[2]

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1. Department of Physics, Kyushu University, Fukuoka 810-8560 (Japan)
2. Department of Physics, Kumamoto University, Kumamoto 860-8555 (Japan)

We investigate the big-bang nucleosynthesis (BBN) in a Brans-Dicke model with a varying {lambda} term. We find that the cosmic expansion rate differs appreciably from that of the Friedmann model during the BBN epoch . The produced abundances of 4He, D, and 7Li are consistent with both the observed ones and the baryon density obtained from WMAP.

• OSTI ID: 20877464
• Journal Information: AIP Conference Proceedings, Vol. 847, Issue 1; Conference: International symposium on origin of matter and evolution of galaxies 2005: New horizon of nuclear astrophysics and cosmology, Tokyo (Japan), 8-11 Nov 2005; Other Information: DOI: 10.1063/1.2234455; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYONS
COSMOLOGY
DENSITY
ELEMENT ABUNDANCE
HELIUM 4
INFLATIONARY UNIVERSE
LITHIUM 7
NUCLEOSYNTHESIS