标题： 通过大尺度结构观测探测非热引力子 显示英文标题

标题： Probing Non-Thermal Gravitinos Through Large-Scale Structure Observations

摘要： 我们研究非热产生的暗物质对大尺度结构形成的影响，重点研究的是引力子暗物质。 我们的分析表明，来自SDSS LRG数据的大尺度结构测量提供了一种有前景的方法来探测非热产生的引力子。 具体而言，如果来自中性微子衰变的引力子构成了暗物质成分的分数$F_\text{dec}=0.35~(0.1)$，则数据排除了质量为$m_{\chi_1^0}\lesssim 25~(11)\text{ GeV}$的bino-like中性微子，在$95\%\text{ C.L.}$的置信水平下。 此外，这一约束似乎在很大程度上与引力子质量无关。 显示英文摘要

摘要： We investigate the effects of non-thermally produced dark matter on large-scale structure formation, focusing on the gravitino dark matter. Our analysis shows that large-scale structure measurements from the SDSS LRG data offer a promising approach to probing non-thermally produced gravitinos. Specifically, if gravitinos resulting from neutralino decay constitute a fraction $F_\text{dec}=0.35~(0.1)$ of the dark matter component, the data exclude bino-like neutralino with a mass $m_{\chi_1^0}\lesssim 25~(11)\text{ GeV}$ at $95\%\text{ C.L.}$. Furthermore, this constraint appears to be largely independent of the gravitino mass.