发表机构
Assam University（阿萨姆大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
在修正引力框架下研究变异山顶暴胀，计算谱指数和标量-张量比，验证其与最新CMB及DESI观测在1σ置信水平兼容。
AI 中文摘要
来自$Planck$和BICEP/$Keck$的高精度观测对张量-标量比施加了严格约束，排除了许多标准暴胀模型。最近来自Atacama和SPT的约束以及DESI提供了不同的可行景观，使得暴胀模型难以维持。在这些日益严格且相互冲突的观测约束中，修正引力理论为恢复暴胀模型的可行性提供了一条引人注目的途径。基于这一动机，我们在$f(\phi, T)$引力中研究变异山顶暴胀，其中标量场非最小耦合到能量-动量张量的迹。计算了标量谱指数$n_s$、张量谱指数$n_t$和张量-标量比$r$，并在$n_s-r$平面上展示了它们的轨迹。然后将结果与来自$Planck$、BICEP/$Keck$、ACT DR6、SPT和DESI DR2的最新联合CMB约束进行比较。我们报告MHI可以预测$r \sim 10^{-3}$，并且与最新CMB和DESI约束SPA+BK+DESI在$1\sigma$置信水平下兼容。
英文摘要
The high-precision observations from the $Planck$ and BICEP/$Keck$ have imposed stringent bounds on the tensor-to-scalar ratio, ruling out many standard inflationary models. The recent bound from Atacama and SPT along with DESI provides a different viable landscape, making it difficult for the inflationary models to sustain. Amid these increasingly stringent and conflicting observational constraints, modified gravity theories offer a compelling avenue to restore the viability of inflationary models. With this motivation, we study mutated hilltop inflation within $f(ϕ, T)$ gravity, where a scalar field is non-minimally coupled to the trace of the energy-momentum tensor. The scalar spectral index $n_s$, the tensor spectral index $n_t$, and the tensor-to-scalar ratio $r$ are calculated, and their trajectories are presented in the $n_s-r$ plane. The results are then confronted with the latest combined CMB bounds from $Planck$, BICEP/$Keck$, ACT DR6, SPT, and DESI DR2. We report that MHI can predict $r \sim 10^{-3}$ and is compatible with the latest CMB & DESI bound SPA+BK+DESI at $ 1σ$ CL.
Comments15 Pages, 4 Figures, Accepted version
DOI：10.1016/j.newast.2026.102659
