Symmetry-breaking inflation in non-minimal metric-affine gravity

IF 5.3 2区物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS

Journal of Cosmology and Astroparticle Physics Pub Date : 2025-05-22 DOI:10.1088/1475-7516/2025/05/072

Ioannis D. Gialamas and Antonio Racioppi

引用次数: 0

Abstract

We study symmetry-breaking inflation within the framework of metric-affine gravity. By introducing a non-minimal coupling, β(ϕ)ℛ̃, between the Holst invariant and the inflaton, both small-field and large-field inflationary predictions can be brought into agreement with the latest observational constraints. Remarkably, even for sub-Planckian vacuum expectation values, appropriately chosen values of β(ϕ) enable viable inflation — a scenario previously considered unattainable.

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非极小度规仿射引力中的对称性破缺膨胀

我们在度量仿射引力的框架内研究对称破缺暴胀。通过在霍尔斯特不变量和暴胀之间引入非极小耦合β(φ) π，可以使小场和大场暴胀预测与最新的观测约束相一致。值得注意的是，即使对于次普朗克真空期望值，适当选择的β（ϕ）值也可以实现可行的暴胀-这是以前认为无法实现的情景。

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

Journal of Cosmology and Astroparticle Physics 地学天文-天文与天体物理

CiteScore

10.20

自引率

23.40%

发文量

632

审稿时长

1 months

期刊介绍： Journal of Cosmology and Astroparticle Physics (JCAP) encompasses theoretical, observational and experimental areas as well as computation and simulation. The journal covers the latest developments in the theory of all fundamental interactions and their cosmological implications (e.g. M-theory and cosmology, brane cosmology). JCAP''s coverage also includes topics such as formation, dynamics and clustering of galaxies, pre-galactic star formation, x-ray astronomy, radio astronomy, gravitational lensing, active galactic nuclei, intergalactic and interstellar matter.