Exploring the cosmological degeneracy between decaying dark matter model and viscous $$\Lambda $$ Λ CDM

Abstract In the context of a homogeneous and isotropic universe, we consider the degeneracy condition at the background level between two scenarios in which processes out of equilibrium are possible; this consideration allows us to deviate from the perfect fluid description, and in this case bulk vi...

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Bibliographic Details
Published in:	European Physical Journal C: Particles and Fields
Main Authors:	Gilberto Aguilar-Pérez, Ana A. Avilez-López, Miguel Cruz
Format:	Article
Language:	English
Published:	SpringerOpen 2025-03-01
Online Access:	https://doi.org/10.1140/epjc/s10052-025-13947-y

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