# Cosmological scalar fields and Big-Bang nucleosynthesis

## TL;DR

This paper investigates how primordial scalar fields influence Big-Bang nucleosynthesis and establishes constraints on their parameters based on observed elemental abundances.

## Contribution

It provides a detailed analysis of scalar field effects on nucleosynthesis and derives new bounds on scalar field parameters from observational data.

## Key findings

- Scalar fields can significantly alter element abundances during nucleosynthesis.
- Constraints on scalar field parameters are tighter than previous estimates.
- Implications for models of dark energy, dark matter, and early universe scenarios.

## Abstract

Scalar fields are widely used in cosmology, in particular to emulate dark energy, for example in quintessence models, or to explain dark matter, in particular within 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.