论文标题
通过陆地和宇宙学实验增强最轻的中微子质量的结合
Strengthening the bound on the mass of the lightest neutrino with terrestrial and cosmological experiments
论文作者
论文摘要
我们从最近最健壮的宇宙学和陆地数据中确定了最轻的中微子质量的上限。在早期的可能有效的相对论自由度上进行边缘化（$ n_ \ mathrm {eff} $），并假设质量正常，最轻的中微子的质量小于0.037 ev，置信度为95％；使用倒数，结合为0.042 eV。这些结果改善了其他近期限制的强度和鲁棒性，并限制了最轻的中微子的质量比最大的质量分裂大。我们展示了现实的质量模型的影响，以及$ n_ \ mathrm {eff} $的不同来源。
We determine the upper limit on the mass of the lightest neutrino from the most robust recent cosmological and terrestrial data. Marginalizing over possible effective relativistic degrees of freedom at early times ($N_\mathrm{eff}$) and assuming normal mass ordering, the mass of the lightest neutrino is less than 0.037 eV at 95% confidence; with inverted ordering, the bound is 0.042 eV. These results improve upon the strength and robustness of other recent limits and constrain the mass of the lightest neutrino to be barely larger than the largest mass splitting. We show the impacts of realistic mass models, and different sources of $N_\mathrm{eff}$.
