Observational predictions of some inflationary models

IF 2.5 3区物理与天体物理 Q2 PHYSICS, PARTICLES & FIELDS

Nuclear Physics B Pub Date : 2024-10-28 DOI:10.1016/j.nuclphysb.2024.116726

Daniel Pozo , Lenin Calvache , Esteban Orozco , Vicente A. Arévalo , Clara Rojas

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引用次数: 0

Abstract

This paper presents the CMB angular power spectrum obtained using the CAMB code for three different models of inflation: the Starobinsky inflationary model, the generalized Starobinsky inflationary model, and the chaotic inflationary model with a step. The results are compared with the most recent data reported for the Planck mission. An analysis of the large (

ℓ ≲ 90

), intermediate (

90 ≲ ℓ ≲ 900

), and small (

ℓ ≳ 900

) angular scales is performed. We report the position of the peaks in the intermediate region so as the cosmological parameters obtained in each of the models: age of the universe,

Ω_{m}

Ω_{b}

Ω_{Λ}

Ω_{K}

and

n_{S}

. We also perform a Bayesian analysis using the Cobaya code to evaluate our three best-fitting models. Additionally, we generated contour plots

(n_{S}, r)

for our inflationary models, taking into account the number of e–folds between the end of inflation and the completion of reheating.

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一些通货膨胀模型的观测预测

本文介绍了利用 CAMB 代码获得的三种不同暴胀模型的 CMB 角功率谱：斯塔罗宾斯基暴胀模型、广义斯塔罗宾斯基暴胀模型和带阶跃的混沌暴胀模型。结果与普朗克任务报告的最新数据进行了比较。对大（ℓ≲90）、中（ℓ≲90）和小（ℓ≳900）角尺度进行了分析。我们报告了中间区域的峰值位置，以及每个模型得到的宇宙学参数：宇宙年龄、Ωm、Ωb、ΩΛ、ΩK 和 nS。我们还使用 Cobaya 代码进行了贝叶斯分析，以评估我们的三个最佳拟合模型。此外，我们还为我们的暴胀模型生成了等值线图（nS,r），并考虑到了暴胀结束与再热完成之间的电子折叠数。

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.