Power-law F(R) gravity as deformations to Starobinsky inflation in view of ACT

IF 4.5 2区物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS

Physics Letters B Pub Date : 2025-09-23 DOI:10.1016/j.physletb.2025.139907

S.D. Odintsov , V.K. Oikonomou

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引用次数: 0

Abstract

In this work we aim to provide a new parametrization of power-law

F (R)

gravity inflation framework in the Jordan frame. It is known in the literature that the power-law

F (R)

gravity inflation of the form

F (R) = R + β R^{n}

is non-viable and produces a power-law evolution. We demonstrate that the standard approach in power-law

F (R)

gravity inflation has some parametrization issues that may lead to inconsistencies and we introduce a new parametrization which elevates the role of power-law

F (R)

gravity deformations of the Starobinsky inflation, making it viable and compatible with both the Planck and ACT data. In our approach the power-law

F (R)

gravity inflation is disentangled from a power-law evolution.

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幂律F(R)引力在ACT下对Starobinsky暴胀的变形

在这项工作中，我们的目的是在约旦框架中提供一个新的幂律F(R)重力暴胀框架的参数化。在文献中已知，F(R)=R+βRn形式的幂律F(R)重力暴胀是不可生存的，并产生幂律演化。我们证明幂律F(R)重力暴胀中的标准方法存在一些可能导致不一致的参数化问题，并且我们引入了一个新的参数化，该参数化提高了幂律F(R)重力暴胀的作用，使其与普朗克和ACT数据兼容。在我们的方法中，幂律F(R)引力暴胀从幂律演化中解脱出来。

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

Physics Letters B 物理-物理：综合

CiteScore

9.10

自引率

6.80%

发文量

647

审稿时长

3 months

期刊介绍： Physics Letters B ensures the rapid publication of important new results in particle physics, nuclear physics and cosmology. Specialized editors are responsible for contributions in experimental nuclear physics, theoretical nuclear physics, experimental high-energy physics, theoretical high-energy physics, and astrophysics.