Abstract
Scalar fields are widely used in cosmology, in particular to emulate dark energy in quintessence models, or to explain dark matter in scenarios such as the fuzzy dark matter model. In addition many scenarios involving primordial scalar fields which could have driven inflation or baryogenesis are currently under scrutiny. In this article, we study the impact of such scalar fields on Big-Bang nucleosynthesis and derive constraints on their parameters using the observed abundance of the elements.
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