标题： 朝向宇宙学中中微子质量的探测 显示英文标题

标题： Towards a cosmological neutrino mass detection

摘要： 未来宇宙学测量应该能够通过中微子对宇宙膨胀速率和物质聚集的影响，间接确定中微子质量的总和。 我们考虑引力透镜效应的宇宙微波背景各向异性以及星系分布中的重子声学振荡，研究在接下来的十年中如何达到对中微子质量总和的投影不确定性$\approx15$ meV（一个$\sigma$ 的最小质量探测）。 目前的 1$\sigma$ 不确定性为$\approx 103$ meV（Planck-2015+BAO-15）将被即将进行的“第三阶段”CMB实验（S3+BAO-15：44 meV）改进，然后是即将进行的BAO测量（S3+DESI：22 meV），以及计划中的下一代“第四阶段”CMB实验（S4+DESI：15-19 meV，取决于角范围）。 改进的光学深度测量很重要：如果S4仅限于$\ell>20$并与当前的大尺度极化数据结合，则投影的中微子质量不确定性将增加到$26$ meV。 超越$\Lambda$CDM，包括曲率不确定性会使 S4+DESI 的预报质量误差增加$\approx$ 50%，并且会使两参数暗能量状态方程的误差翻倍。包括星系引力透镜在内的互补低红移探针将在区分大质量中微子和非$w=-1$、平坦几何结构方面发挥作用。 显示英文摘要

摘要： Future cosmological measurements should enable the sum of neutrino masses to be determined indirectly through their effects on the expansion rate of the Universe and the clustering of matter. We consider prospects for the gravitationally lensed Cosmic Microwave Background anisotropies and Baryon Acoustic Oscillations in the galaxy distribution, examining how the projected uncertainty of $\approx15$ meV on the neutrino mass sum (a 4$\sigma$ detection of the minimal mass) might be reached over the next decade. The current 1$\sigma$ uncertainty of $\approx 103$ meV (Planck-2015+BAO-15) will be improved by upcoming 'Stage-3' CMB experiments (S3+BAO-15: 44 meV), then upcoming BAO measurements (S3+DESI: 22 meV), and planned next-generation 'Stage 4' CMB experiments (S4+DESI: 15-19 meV, depending on angular range). An improved optical depth measurement is important: the projected neutrino mass uncertainty increases to $26$ meV if S4 is limited to $\ell>20$ and combined with current large-scale polarization data. Looking beyond $\Lambda$CDM, including curvature uncertainty increases the forecast mass error by $\approx$ 50% for S4+DESI, and more than doubles the error with a two-parameter dark energy equation of state. Complementary low-redshift probes including galaxy lensing will play a role in distinguishing between massive neutrinos and a departure from a $w=-1$, flat geometry.