标题： 相互作用的暗能量在DESI DR2之后：对$Λ$CDM范式的挑战？ 显示英文标题

标题： Interacting dark energy after DESI DR2: a challenge for $Λ$CDM paradigm?

摘要： 我们通过与各种观测数据集的详细对比，研究了相互作用暗能量的情景。 我们以一种普遍的方式量化这种相互作用，通过暗物质能量密度的标准标度偏差。 我们使用来自宇宙时钟（CC）的观测哈勃数据，来自最近发布的DESI DR2的重子声学振荡（BAO）数据，来自Ia型超新星（SNIa）的数据，以及通过SH0ES校准和未校准的SNIa数据，最后是普朗克2018年的CMB数据。 对于基本且最简单的相互作用模型，我们发现数据支持在$2\sigma$以内存在非零相互作用。 值得注意的是，当使用SH0ES校准的SNIa数据时，非零相互作用的偏好变得更加显著。 然而，通过AIC、BIC和贝叶斯分析与$\Lambda$CDM情景的比较，揭示出一个混合的图景。 显示英文摘要

摘要： We investigate the scenario of interacting dark energy through a detailed confrontation with various observational datasets. We quantify the interaction in a general way, through the deviation from the standard scaling of the dark matter energy density. We use observational Hubble Data from Cosmic Chronometers (CC), data from Baryon Acoustic Oscillations (BAO) from the recently released DESI DR2, data from Supernova Type Ia (SNIa), both with and without calibration by SH0ES, and finally the CMB data from Planck 2018. For the basic and simplest interacting model, we find that the data favor a non-zero interaction up to $2\sigma$. Notably, when we employ SH0ES-calibrated SNIa data the preference of non-zero interaction becomes more significant. However, comparison with $\Lambda$CDM scenario through AIC, BIC and Bayesian analysis, reveals a mixed picture.