AI 中文总结
基于DESI DR1星系功率谱全形状分析，结合ACT和普朗克的宇宙微波背景数据，对超轻轴子作为暗物质子成分给出更新限制。关注特定质量窗口，采用新方法，最小质量限制提升超两倍，还探讨了未来研究方向。
AI 中文摘要
我们给出了作为暗物质子成分的超轻轴子（ULA）的更新限制，这些限制来自对 DESI 数据发布 1 的星系功率谱的全形状分析，并结合了来自 ACT 和普朗克的宇宙微波背景（CMB）数据。我们关注质量窗口$10^{-32}\,\mathrm{eV}\leq m_a \leq 10^{-24}\,\mathrm{eV}$，采用基于大尺度结构有效场论的最新分析方法。对于最小质量，我们与 DESI 的联合分析比仅使用 CMB 的限制提高了两倍多，建立了迄今为止最严格的限制。例如，对于$m_a \sim 10^{-29}\,\mathrm{eV}$，ULA 被限制在总物质能量密度的$0.3\%$以下。DESI 亮红星系样本对$m_a \approx 10^{-26}\,\mathrm{eV}$的 ULA 子成分有轻微偏好，但与 CMB 数据结合后这种偏好消失。在未来研究中，探测最大质量$m_a\gtrsim10^{-25}\,\mathrm{eV}$时，将数据分析扩展到更小尺度将有益，但也需要理论建模的同步改进。
英文摘要
We present updated bounds on ultra-light axions (ULAs) as a subcomponent of dark matter, derived from the full-shape analysis of the DESI Data Release 1 galaxy power spectra combined with Cosmic Microwave Background (CMB) data from ACT and Planck. We focus on the mass window $10^{-32}\,\mathrm{eV}\leq m_a \leq 10^{-24}\,\mathrm{eV}$, employing state-of-the-art analysis methods rooted in the Effective Field Theory of Large Scale Structure. For the smallest masses, our joint analysis with DESI improves over CMB-only constraints by more than a factor of 2, establishing the most stringent limits to date. For instance, for $m_a \sim 10^{-29}\,\mathrm{eV}$ ULAs are constrained to be a fraction as small as $0.3\%$ of the total matter energy density. The DESI Luminous Red Galaxy sample shows a mild preference for an ULA subcomponent with $m_a \approx 10^{-26}\,\mathrm{eV}$, mirroring previous hints from BOSS, but this preference vanishes upon combination with CMB data. Probing the largest masses, $m_a\gtrsim10^{-25}\,\mathrm{eV}$, in future studies will benefit from extending the data analysis to smaller scales, both for galaxy clustering and CMB lensing, but will also require concurrent improvements in the theoretical modeling.
Comments10 pages + appendices and references, 8 figures, 2 tables
