Variations in fundamental constants at the cosmic dawn

  title={Variations in fundamental constants at the cosmic dawn},
  author={Laura Lopez-Honorez and Olga Mena and Sergio Palomares-Ruiz and Pablo Villanueva-Domingo and Samuel J. Witte},
  journal={arXiv: Cosmology and Nongalactic Astrophysics},
The observation of space-time variations in fundamental constants would provide strong evidence for the existence of new light degrees of freedom in the theory of Nature. Robustly constraining such scenarios requires exploiting observations that span different scales and probe the state of the Universe at different epochs. In the context of cosmology, both the cosmic microwave background and the Lyman-$\alpha$ forest have proven to be powerful tools capable of constraining variations in… Expand

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