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arXiv 2212.04516hep-phastro-ph.CO
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重子与暗物质的 Affleck-Dine 共同生成

Affleck-Dine Cogenesis of Baryon and Dark Matter

Debasish Borah, Suruj Jyoti Das, Nobuchika Okada

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Version 3: 18 pages, 3 captioned figures, matches version accepted for publication in JHEP
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AI总结：

本文提出基于 Affleck-Dine 路径的重子与暗物质共同生成机制，通过 AD 场演化产生不对称性并转移至暗扇区，结合共振增强湮灭与 $B-L$ 门户确定暗物质丰度，且该场同时充当暴胀子。

摘要：

我们提出了一种通过 Affleck-Dine (AD) 路径在宇宙中共同生成重子与暗物质 (DM) 的机制。一个打破轻子数对称性的 AD 场，凭借其宇宙演化导致了轻子不对称性的产生，随后这种不对称性被转移到轻子与暗物质扇区。轻子不对称性通过 sphalerons 转化为重子不对称性，而暗扇区不对称性则通过共振增强的湮灭导致对称部分被湮灭掉，从而产生最终的 DM 丰度，我们选择由一个规范化的 $B-L$ 门户来提供这种湮灭。来自 DM 直接探测的严格限制迫使 DM 和 $B-L$ 规范玻色子质量必须很轻，在几个 GeV 的量级。虽然模型参数空间的大部分已被排除，但剩余的参数空间仍处于实验室及基于宇宙学的实验的灵敏度范围内。凭借其与引力的非最小耦合，AD 场还扮演了暴胀子的角色，其所需的动力学与观测结果一致。

英文摘要：

We propose a mechanism for cogenesis of baryon and dark matter (DM) in the universe via the Affleck-Dine (AD) route. An AD field which breaks the lepton number symmetry, leads to the generation of lepton asymmetry by virtue of its cosmic evolution, which then gets transferred into lepton and dark sectors. While the lepton asymmetry gets converted into baryon asymmetry via sphalerons, the dark sector asymmetry leads to the final DM abundance with the symmetric part being annihilated away due to resonantly enhanced annihilation, which we choose to be provided by a gauged $B-L$ portal. Stringent constraints from DM direct detection forces DM and $B-L$ gauge boson masses to be light, in the few GeV ballpark. While a large portion of the model parameter space is already ruled out, the remaining parameter space is within sensitivity of laboratory as well as cosmology based experiments. The AD field also plays the role of inflaton with the required dynamics by virtue of its non-minimal coupling to gravity, consistent with observations.

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。

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