Coupled variations of fundamental couplings and primordial nucleosynthesis

2006/10/31 by Alain Coc, A. Coc, N. J. Nunes +4 · 182 citations
Physics and Astronomy · #Big Bang nucleosynthesis #Binding energy #CMB cold spot #Cosmic microwave background #Cosmology and Gravitation Theories #Deuterium #Meson #Multipole expansion #Neutron #Nuclear physics #Nuclear physics research studies #Nuclear reaction #Nucleon #Nucleosynthesis #Omega #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum mechanics #Sigma #Yukawa potential #astro-ph

paper · pdf · open access · doi:10.1103/physrevd.76.023511

published in Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields 76(2) (American Physical Society) · 12 pages, 6 figures. Revised sensitivity of B_D with the fundamental parameters. Added section on the sensitivity of B_D with the pion mass. Conclusions unchanged

arxiv created 2007/07/17 · openalex publication_date 2007/07/20 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

The effect of variations of the fundamental nuclear parameters on big-bang nucleosynthesis are modeled and discussed in detail taking into account the interrelations between the fundamental parameters arising in unified theories. Considering only ⁴He, strong constraints on the variation of the neutron lifetime, neutron-proton mass difference are set. These constraints are then translated into constraints on the time variation of the Yukawa couplings and the fine structure constant. Furthermore, we show that a variation of the deuterium binding energy is able to reconcile the ⁷Li abundance deduced from the WMAP analysis with its spectroscopically determined value while maintaining concordance with D and ⁴He. The analysis is strongly based on the potential model of Flambaum and Shuryak that relates the binding energy of the deuteron with the nucleon and \ensuremathσ and \ensuremathω mesons masses; however, we show that an alternative approach that consists of a pion mass dependence necessarily leads to equivalent conclusions.

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