标题： 最新宇宙学对热暗物质和冷暗物质密度的限制 显示英文标题

标题： Latest cosmological constraints on the densities of hot and cold dark matter

摘要： 随着实验物理学家加大了对冷暗物质粒子和中微子质量的探索力度，宇宙学限制正在变得更为严格。 我们计算了来自宇宙微波背景和大尺度结构数据对11个宇宙学参数的联合限制，并发现有95%的置信度表明总的（冷+热）暗物质密度为h^2 Omega_dark = 0.20 +.12 -.10，其中最多只有38%是热暗物质（由中微子贡献）。 假设中微子可以忽略不计，这一测量值被收紧为h^2 Omega_dark = 0.13 +0.04 -0.02，即2.4e-27 kg/m^3上下浮动20%。 显示英文摘要

摘要： As experimentalists step up their pursuit of cold dark matter particles and neutrino masses, cosmological constraints are tightening. We compute the joint constraints on 11 cosmological parameters from cosmic microwave background and large scale structure data, and find that at 95% confidence, the total (cold+hot) dark matter density is h^2 Omega_dark = 0.20 +.12 -.10 with at most 38% of it being hot (due to neutrinos). A few assumptions, including negligible neutrinos, tighten this measurement to h^2 Omega_dark = 0.13 +0.04 -0.02, i.e, 2.4e-27 kg/m^3 give or take 20%.