arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2106.09562hep-phgr-qc
收藏

引力轻子生成模型

A Model of Gravitational Leptogenesis

Swansea University(斯旺西大学)

Graham M Shore

AI总结:

本文提出通过辐射诱导引力轻子生成机制,在早期宇宙中产生轻子与反轻子的不对称性,从而解释宇宙物质-反物质不对称性。

摘要:

引力轻子生成是一种优雅地解释宇宙物质-反物质不对称性的方法。本文是对最近提出的辐射诱导引力轻子生成(RIGL)机制的综述,其中量子场论在弯曲时空中的环效应自动在早期宇宙的热准平衡中产生轻子与反轻子之间的不对称性。该机制在简单的见锯模型中得到说明,其中所需的轻子数违反相互作用由具有O(10^10) GeV重大质量的右-handed中微子介导。 Boltzmann方程被扩展以包含新的、由环效应引起的引力效应,并被求解以描述早期宇宙中轻子数不对称性的演变。通过自然选择的中微子参数,RIGL机制能够产生当今宇宙中观测到的质子-光子比。

英文摘要:

Gravitational leptogenesis is an elegant way of explaining the matter-antimatter asymmetry in the universe. This paper is a review of the recently proposed mechanism of radiatively-induced gravitational leptogenesis (RIGL), in which loop effects in QFT in curved spacetime automatically generate an asymmetry between leptons and antileptons in thermal quasi-equilibrium in the early universe. The mechanism is illustrated in a simple see-saw BSM model of neutrinos, where the lepton-number violating interactions required by the Sakharov conditions are mediated by right-handed neutrinos with Majorana masses of O(10^10) GeV. The Boltzmann equations are extended to include new, loop-induced gravitational effects and solved to describe the evolution of the lepton number asymmetry in the early universe. With natural choices of neutrino parameters, the RIGL mechanism is able to generate the observed baryon-to-photon ratio in the universe today.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑