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Status: Unchecked ×Keyword: DESI baryon acoustic oscillations ×Clear all

5 claims from 2 papers

1. Physics and Astronomy › Cosmology and Gravitation Theories

   Nonparametric late-time expansion history reconstruction and implications for the Hubble tension in light of recent DESI and type Ia supernovae data

   Jiang, Pedrotti, da Costa and Vagnozzi · Physical review. D/Physical review. D. · 2024

   Unchecked3 claims
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   1. Unchecked“Applied to DESI BAO and PantheonPlus SNeIa data, both methods indicate that deviations from a reference $Λ$CDM model in the $z \lesssim 2$ unnormalized expansion rate $E(z)$ are constrained to be $\lesssim 10\%$, but also consistently identify two features i…
   2. Unchecked“Breaking the $r_d$-$H_0$ degeneracy with the SH0ES prior on $H_0$, the significance of the tension between our nonparametric determination of $r_d=136.20^{+2.20}_{-2.40}\,{\text{Mpc}}$ and the \textit{Planck} $Λ$CDM-based determination is at the $5σ$ level,…
   3. Unchecked“We infer $c/(r_dH_0)=29.90 \pm 0.33$, with $r_d$ the sound horizon at baryon drag and $H_0$ the Hubble constant.”

2. Physics and Astronomy › Neutrino Physics Research

   Neutrino cosmology after DESI: tightest mass upper limits, preference for the normal ordering, and tension with terrestrial observations

   Jiang, Giarè, Gariazzo et al. · White Rose Research Online (University of Leeds, The University of Sheffield, University of York) · 2024

   Unchecked2 claims
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   1. Unchecked“Combining DESI data with Cosmic Microwave Background measurements and several late-time background probes, the tightest $2σ$ limit we find without including a local $H_0$ prior is $\sum m_ν<0.05\,{\text{eV}}$.”
   2. Unchecked“This leads to a strong preference for the normal ordering, with Bayes factor relative to the inverted one of $46.5$.”