发表机构
Università degli Studi di Milano and INFN, Sezione di Milano（米兰大学和意大利国家核物理研究所米兰分部）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
针对DESI与CMB宇宙学张力，提出暗物质惯性质量与引力质量不等，从而在暗扇区引入新长程力，拟合数据给出约0.5%强度、2.5-3σ证据。
AI 中文摘要
暗能量光谱仪（DESI）对星系分布的最新测量结果，与基于宇宙微波背景（CMB）各向异性推断并外推到低红移的标准Λ-冷暗物质宇宙学模型之间存在轻微张力。已有多种基于新物理的解释被提出，特别是来自复杂暗扇区的新动力学。本文报告了该张力的一个解决方案，该方案假设暗物质粒子的惯性质量与引力质量不相同。我们将CMB数据分别与DESI DR1（第一次数据发布）的重子声学振荡（BAO）和全形状（FS）数据，或仅与BAO DR2数据联合进行最佳拟合，结果表明暗扇区中存在一种新的长程力，其强度相对于引力约为β~0.5%，显著性约为2.5σ。一项结合FS DR1和BAO DR2数据的初步分析证实了DR2的统计能力，并将暗力的证据提升至约3σ，尽管该分析忽略了两个数据集之间尚不可用的互相关。
英文摘要
Recent measurements of the distribution of galaxies by the Dark Energy Spectroscopic Instrument (DESI) are in mild tension with a standard $Λ$-Cold Dark Matter cosmological model inferred from the anisotropies of the Cosmic Microwave Background (CMB) when extrapolated to low redshifts. Several solutions to explain this discrepancy in terms of new physics have been put forward, notably from new dynamics in a complex Dark Sector. Here we report on a resolution to this discrepancy that postulates that the inertial and gravitational masses of dark matter particles are not the same. Our best fit to CMB data combined either with Baryon Acoustic Oscillation (BAO) and Full Shape (FS) data from DESI DR1 (Data Release 1), or with BAO DR2 data alone, suggests the presence of a new long-range force in the Dark Sector with strength of $β\sim 0.5\% $ relative to gravity, at the $\sim 2.5σ$ level. A preliminary analysis combining FS DR1 and BAO DR2 data confirms the statistical power of DR2 and raises the evidence for dark forces to $\sim 3σ$, albeit ignoring the not yet available cross-correlation between the two datasets.
Comments11 pages, 6 figures, 2 tables
