Observational constraints on inflationary parameters in exponential f(T) gravity with well-known potentials

IF 2.8 3区物理与天体物理 Q2 PHYSICS, PARTICLES & FIELDS

Nuclear Physics B Pub Date : 2025-09-08 DOI:10.1016/j.nuclphysb.2025.117101

Abdul Jawad , Nelson Videla , Abdul Malik Sultan , N. Myrzakulov , Ayesha Aslam , Sanjar Shaymatov

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引用次数: 0

Abstract

In this paper, we investigate the viability of an exponential

f (T)

gravity for describing cosmic inflation with a canonical scalar field. In order to obtain concrete results, we use four well-known potentials such as general hilltop inflation potential, valley hybrid inflation potential, shaft potential and minimal inflation potential. For each considered potential, we evaluate the several inflationary parameters at background and perturbative levels. Then, we perform a Markov Chain Monte Carlo (MCMC) analysis to estimate the parameters of each potential model by exploring its parameter space. In addition, we plot the corresponding trajectories in the

r - n_{s}

and

α_{s} - n_{s}

planes. In this sense, we make the comparison with the two-marginalized joint confidence at 68% and 95% C.L. from the latest BICEP/Keck results. The results mostly show small values for the tensor -to-scalar ratio and acceptable values for the scalar spectral index, which are within the current observational bounds.

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具有已知势的指数f(T)引力中暴胀参数的观测约束

本文研究了指数f(T)引力在正则标量场下描述宇宙暴胀的可行性。为了获得具体结果，我们使用了四种众所周知的势，即一般山顶膨胀势、山谷混合膨胀势、竖井膨胀势和最小膨胀势。对于每个考虑的潜力，我们在背景和扰动水平上评估几个暴胀参数。然后，我们通过马尔可夫链蒙特卡罗（MCMC）分析，通过探索其参数空间来估计每个潜在模型的参数。此外，我们在r - ns和αs - ns平面上绘制了相应的轨迹。在这个意义上，我们与最新BICEP/Keck结果中68%和95% C.L.的双边缘关节置信度进行了比较。结果显示，张量与标量比的值较小，标量光谱指数的值可接受，在当前观测范围内。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Nuclear Physics B 物理-物理：粒子与场物理

CiteScore

5.50

自引率

7.10%

发文量

302

审稿时长

1 months

期刊介绍： Nuclear Physics B focuses on the domain of high energy physics, quantum field theory, statistical systems, and mathematical physics, and includes four main sections: high energy physics - phenomenology, high energy physics - theory, high energy physics - experiment, and quantum field theory, statistical systems, and mathematical physics. The emphasis is on original research papers (Frontiers Articles or Full Length Articles), but Review Articles are also welcome.