标题： DESIBAO数据对膨胀参数的影响：对抗晚时间新物理的稳定性 显示英文标题

标题： Impact of DESI BAO Data on Inflationary Parameters: stability against late-time new physics

摘要： 在这项工作中，我研究了暗能量光谱仪（DESI）重子声波振荡（BAO）数据对宇宙学参数的影响，重点关注了暴胀谱指数 $n_s$、标量扰动振幅 $A_s$ 和物质密度参数 $\omega_m$。 通过检查晚期新物理的不同模型，与使用早期SDSS合作组BAO数据的基线数据集相比，暴胀参数被发现是稳定的。 当与宇宙微波背景（CMB）和Ia型超新星（SNeIa）结合时，DESI BAO 数据导致 $\omega_m$ （减少不到2%）略有下降，并且与使用SDSS BAO数据的相同组合相比，$A_s$ 和 $n_s$ 有适度变化，这表明物质聚类存在细微变化。 这些效应可能归因于动态暗能量的更高膨胀率、复合时期的改变或物质-辐射平等时期的变化。 进一步分析具有动力学暗能量和自由曲率的模型显示出 $\omega_m$ 减少的一致趋势，同时 $n_s$ 和 $H_0$ 均有轻微增加。 结果强调了DESI BAO数据在改进宇宙参数估计中的重要性，并突出了不同晚期宇宙学模型中膨胀参数的稳定性。 显示英文摘要

摘要： In this work, I investigate the impact of Dark Energy Spectroscopic Instrument (DESI) Baryonic Acoustic Oscillations (BAO) data on cosmological parameters, focusing on the inflationary spectral index $n_s$, the amplitude of scalar perturbations $A_s$, and the matter density parameter $\omega_m$. By examining different models of late-time new physics, the inflationary parameters were revealed to be stable when compared with the baseline dataset that used the earlier BAO data from the SDSS collaboration. When combined with Cosmic Microwave Background (CMB) and type Ia supernovae (SNeIa), DESI BAO data leads to a slight reduction in $\omega_m$ (less than 2\%) and modest changes in $A_s$ and $n_s$, if compared with the same combination but using SDSS BAO data instead, suggesting a subtle shift in matter clustering. These effects may be attributed to a higher expansion rate from dynamical dark energy, changes in the recombination period, or modifications to the matter-radiation equality time. Further analyses of models with dynamical dark energy and free curvature show a consistent trend of reduced $\omega_m$, accompanied by slight increases in both $n_s$ and $H_0$. The results emphasize the importance of the DESI BAO data in refining cosmological parameter estimates and highlight the stability of inflationary parameters across different late-time cosmological models.