各向异性宇宙学中的热轻生现象

IF 1.4 4区物理与天体物理 Q3 PHYSICS, NUCLEAR

International Journal of Modern Physics a Pub Date : 2023-12-15 DOI:10.1142/s0217751x23501816

Mehran Dehpour

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引用次数: 0

摘要

没有证据表明宇宙在大爆炸核合成之前一定是均质和各向同性的。比安奇 I 型宇宙学是最简单的均质但各向异性的宇宙学。在这项工作中，我们研究了比安奇 I 型宇宙学中作为重生成情景的热轻生成。我们的研究结果表明，对于各向异性的特定值，修正的热跃迁发生比标准的热跃迁发生产生了更多的重子不对称。因此，各向异性有助于实现低尺度的跃迁发生。

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Thermal leptogenesis in anisotropic cosmology

There is no evidence that the universe must have been homogeneous and isotropic before the big bang nucleosynthesis. The Bianchi type-I cosmology is the simplest homogeneous but anisotropic cosmology. In this work, we investigate thermal leptogenesis, as a baryogenesis scenario, in the Bianchi type-I cosmology. Our results show that for specific values of the anisotropy, the modified thermal leptogenesis generated more baryon asymmetry than the standard one. In this way, anisotropy can help to achieve low-scale leptogenesis.

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来源期刊

International Journal of Modern Physics a 物理-物理：核物理

CiteScore

3.00

自引率

12.50%

发文量

283

审稿时长

3 months

期刊介绍： Started in 1986, IJMPA has gained international repute as a high-quality scientific journal. It consists of important review articles and original papers covering the latest research developments in Particles and Fields, and selected topics intersecting with Gravitation and Cosmology. The journal also features articles of long-standing value and importance which can be vital to research into new unexplored areas.