Coupled variations of fundamental couplings and primordial nucleosynthesis

Alain Coc, Nelson J. Nunes, Keith A. Olive, Jean Philippe Uzan, Elisabeth Vangioni

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139 Scopus citations


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 He4, 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 Li7 abundance deduced from the WMAP analysis with its spectroscopically determined value while maintaining concordance with D and He4. 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 σ and ω mesons masses; however, we show that an alternative approach that consists of a pion mass dependence necessarily leads to equivalent conclusions.

Original languageEnglish (US)
Article number023511
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Issue number2
StatePublished - Jul 20 2007


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