The recent DESI 2024 Baryon Acoustic Oscillations (BAO) measurements combined with the CMB data from the Planck 18 PR3 dataset and the Planck PR4+ACT DR6 lensing data, with a prior on the sum of the neutrino masses ∑ mν > 0, leads to a strong constraint, ∑ mν < 0.072 eV, which would exclude the inverted neutrino hierarchy and put some tension on even the standard hierarchy. We show that actually this bound gets significantly relaxed when combining the new DESI measurements with the HiLLiPoP + LoLLiPoP likelihoods, based on the Planck 2020 PR4 dataset, and with supernovae datasets. We note that the fact that neutrino masses are pushed towards zero, and even towards negative values, is known to be correlated with the so-called AL tension, a mismatch between lensing and power spectrum measurements in the Planck PR3 data, which is reduced by HiLLiPoP + LoLLiPoP to less than 1σ. We find ∑ mν < 0.1 eV and ∑ mν < 0.12 eV, with the supernovae Pantheon+ and DES-SN5YR datasets respectively. The shift caused by these datasets is more compatible with the expectations from neutrino oscillation experiments, and both the normal and inverted hierarchy scenarios remain now viable, even with the ∑ mν > 0 prior. Finally, we analyze neutrino mass bounds in an extension of ΛCDM that addresses the H0 tension, with extra fluid Dark Radiation, finding that in such models bounds are further relaxed and the posterior probability for ∑ mν begins to exhibit a peak at positive values.

中文翻译：

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DESI 2024 的中微子质量范围被普朗克 PR4 和宇宙学超新星放宽


最近的 DESI 2024 重子声学振荡 （BAO） 测量与来自普朗克 18 PR3 数据集和普朗克 PR4+ACT DR6 透镜数据的 CMB 数据相结合，先验了中微子质量之和 ∑ mν > 0，导致了一个强约束，∑ mν < 0.072 eV，这将排除倒置的中微子层次结构，甚至对标准层次结构造成一些紧张。我们表明，当基于普朗克 2020 PR4 数据集和超新星数据集，将新的 DESI 测量与 HiLLiPoP + LoLLiPoP 似然相结合时，这个界限实际上会显着放松。我们注意到，中微子质量被推向零，甚至接近负值的事实，与所谓的 AL 张力相关，即普朗克 PR3 数据中透镜和功率谱测量之间的不匹配，通过 HiLLiPoP + LoLLiPoP 将其降低到小于 1σ。我们分别在超新星 Pantheon+ 和 DES-SN5YR 数据集中发现了 ∑ mν < 0.1 eV 和 ∑ mν < 0.12 eV。由这些数据集引起的偏移与中微子振荡实验的预期更兼容，即使之前∑ mν > 0，正常和倒层次结构情景现在仍然可行。最后，我们分析了 ΛCDM 扩展中的中微子质量边界，该边界解决了 H0 张力，具有额外的流体暗辐射，发现在此类模型中，边界进一步松弛，∑ mν 的后验概率开始在正值处表现出峰值。