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1,545 claims from 958 papers are on the record. 46 have been checked so far; the other 1,499 have no check with a result yet.

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Status: Unchecked ×Keyword: CPL parametrization ×Clear all

9 claims from 6 papers

1. Physics and Astronomy › Cosmology and Gravitation Theories

   An overview of what current data can (and cannot yet) say about evolving dark energy

   Giarè, Mahassen, Di Valentino and Pan · Physics of the Dark Universe · 2025

   A review tests how robust the preference for evolving dark energy is, using over 35 combinations of CMB, supernova, BAO and cosmic chronometer data with the CPL parametrization.

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   1. UncheckedSome dataset combinations without DESI-BAO data, pairing SDSS-BAO with Union3 or DESY5 supernovae, also favour evolving dark energy.“However, intriguing hints supporting DDE emerge in combinations that do not include DESI-BAO measurements: SDSS-BAO combined with SN from Union3 and DESY5 (with and without CMB) support the preference for DDE.”

2. Physics and Astronomy › Cosmology and Gravitation Theories

   Pressure parametrization of dark energy: first and second-order constraints with latest cosmological data

   Cheng, Di Valentino, Escamilla, Sen and Visinelli · Journal of Cosmology and Astroparticle Physics · 2025

   The authors model dark energy through a changing pressure, test first- and second-order versions against cosmological data, and find the combined datasets favour a departure from a cosmological constant.

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   1. UncheckedCombining Planck CMB, DESI and DESY5 data gives the strongest evidence yet in this study for evolving dark energy, at 2.7σ (first order) and over 4σ (second order).“A joint analysis of Planck CMB, DESI, and DESY5 data yields the strongest evidence for DDE, with a $2.7σ$ deviation in the first-order model and over $4σ$ in the second-order model, providing strong statistical support for a departure from a cosmological constant.”
   2. UncheckedIn the second-order pressure model, the reconstructed dark energy shows non-monotonic energy density and equation of state, with clear phantom crossings.“The reconstructed DE evolution in the second-order case reveals a distinctive non-monotonic behavior in both energy density and $w_{\rm DE}(a)$, including clear phantom-crossing phenomena.”

3. Physics and Astronomy › Cosmology and Gravitation Theories

   Cosmographic Footprints of Dynamical Dark Energy

   Fazzari, Giarè and Di Valentino · The Astrophysical Journal Letters · 2025

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   1. Unchecked“The method relies on generalized Padé-$(2,1)$ expansions around arbitrary pivot redshifts, which, compared to state-of-the-art calculations, reduce truncation errors by up to two orders of magnitude at high redshift and yield more precise constraints by defi…

4. Physics and Astronomy › Cosmology and Gravitation Theories

   Shape of dark energy: Constraining its evolution with a general parametrization

   Lee, Yang, Di Valentino, Pan and van de Bruck · Physical review. D/Physical review. D. · 2026

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   1. Unchecked“The present-day value of the DE EoS remains in the quintessence regime according to our results, and no significant evidence for a dynamical DE EoS is found.”
   2. Unchecked“Nonetheless, the Bayesian evidence difference remains below the threshold for statistical significance according to the revised Jeffreys scale, indicating that both models are effectively equally preferred by the data.”

5. Physics and Astronomy › Cosmology and Gravitation Theories

   Revisiting CPL with sign-switching density: To cross or not to cross the NECB

   Gökçen, Akarsu and Di Valentino · Physics of the Dark Universe · 2026

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   1. Unchecked“We find that late-time BAO and SNeIa data drive the negative-density phase beyond their effective redshift coverage, and that this requirement is the primary driver of the inferred parameter behavior.”
   2. Unchecked“While both models are statistically disfavored relative to the baseline CPL, admitting a negative DE phase generally reduces the significance of deviations from a cosmological constant.”

6. Physics and Astronomy › Cosmology and Gravitation Theories

   Does dark energy really revive using DESI 2024 data?

   Carloni, Luongo and Muccino · arXiv (Cornell University) · 2024

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   1. Unchecked“To check the goodness of our findings, we further directly fit the product, $r_d h_0$, concluding that $r_d h_0$ is anticorrelated with the mass.”