Observational Constraints on Early Coupled Quintessence - Archive ouverte HAL
Article Dans Une Revue Physical Review D Année : 2024

Observational Constraints on Early Coupled Quintessence

Résumé

We investigate an Early Coupled Quintessence model where a light scalar mediates a fifth force stronger than gravity among dark matter particles and leads to the growth of perturbations prior to matter-radiation equality. Using cosmological data from the $\textit{Planck}$ Cosmic Microwave Background power spectra, the Pantheon+ Type 1a Supernovae, Baryon Acoustic Oscillations, and Big Bang Nucleosynthesis, we constrain the coupling strength $\beta$ and the redshift $z_{\rm OFF}$ at which the interaction becomes effectively inactive, finding a firm degeneracy between these two parameters which holds true regardless of when the scaling regime begins.

Dates et versions

hal-04186924 , version 1 (24-08-2023)

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Citer

Lisa W.K Goh, Joan Bachs-Esteban, Adrià Gómez-Valent, Valeria Pettorino, Javier Rubio. Observational Constraints on Early Coupled Quintessence. Physical Review D, 2024, 109 (2), pp.023530. ⟨10.1103/PhysRevD.109.023530⟩. ⟨hal-04186924⟩
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