Response of primordial abundances to a general modification of G{sub N} and/or of the early universe expansion rate

Journal Article · Wed Jun 15 00:00:00 EDT 2005 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PhysRevD.71.123524· OSTI ID:20709539

Bambi, C; Giannotti, M; Villante, F L ^[1]

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1. Istituto Nazionale di Fisica Nucleare, Sezione di Ferrara, I-44100 Ferrara, Italy and Dipartimento di Fisica dell'Universita di Ferrara, I-44100 Ferrara (Italy)

We discuss the effects of a possible time variation of the Newton constant G{sub N} on light elements production in big bang nucleosynthesis (BBN). We provide analytical estimates for the dependence of primordial abundances on the value of the Newton constant during BBN. The accuracy of these estimates is then tested by numerical methods. Moreover, we determine numerically the response of each element to an arbitrary time-dependent modification of the early universe expansion rate. Finally, we determine the bounds on possible variations of G{sub N} which can be obtained from the comparison of theoretical predictions and observational data.

• OSTI ID: 20709539
• Journal Information: Physical Review. D, Particles Fields, Vol. 71, Issue 12; Other Information: DOI: 10.1103/PhysRevD.71.123524; (c) 2005 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
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ACCURACY
COMPARATIVE EVALUATIONS
COSMOLOGY
ELEMENT ABUNDANCE
LIGHT NUCLEI
NUCLEOSYNTHESIS
TIME DEPENDENCE
UNIVERSE
VARIATIONS