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...
| Published in: | European Physical Journal C: Particles and Fields |
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| Main Authors: | , , |
| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2025-03-01
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| Online Access: | https://doi.org/10.1140/epjc/s10052-025-13947-y |