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arXiv 2510.04549hep-ph
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左右对称模型中的狄拉克中微子与暗物质

Dirac neutrino and dark matter in left-right symmetric models

Shohei Okawa, Yuji Omura, Keyun Wu

AI总结:

本研究在软破缺宇称的左右对称模型中,通过单圈/三圈辐射机制生成带电轻子与狄拉克中微子质量,发现GeV量级的新轻粒子可作为暗物质候选,并确定了符合中微子数据的可行参数空间。

摘要:

我们在左右对称模型中研究中微子质量产生机制与暗物质问题。该模型基于$SU(3)_c\times SU(2)_L \times SU(2)_R \times U(1)_{B-L}$规范理论,具有软破缺的宇称对称性。带电轻子与中微子的质量分别通过与新引入的中性费米子、标量粒子的相互作用,在单圈和三圈水平辐射产生。为重现观测到的带电轻子谱模式与中微子振荡数据,这些新粒子需满足特定的质量层级关系。最终得到的轻粒子质量可低至GeV量级,是良好的暗物质候选者。这类暗物质候选者的现象学由其与左手中微子或右手中微子的相互作用决定。我们通过多组能重现真实中微子质量矩阵结构的基准参数集研究暗物质物理,并确定了可行的参数空间。

英文摘要:

We study neutrino mass generation and dark matter in a left-right symmetric model. The model is based on an $SU(3)_c\times SU(2)_L \times SU(2)_R \times U(1)_{B-L}$ gauge theory with a softly broken parity symmetry. Masses of the charged leptons and neutrinos are generated radiatively at one-loop and three-loop level respectively, through their interactions with newly introduced neutral fermion and scalar particles. A mass hierarchy of those new particles is required to reproduce the observed patterns of the charged lepton spectrum and neutrino oscillation data. The resulting light particles, whose mass can be as light as GeV, serve as good dark matter candidates. The phenomenology of such dark matter candidates is governed by their interactions to left- or right-handed neutrinos. We study physics of dark matter with several benchmark parameter sets that reproduce the realistic neutrino mass matrix structure, and identify viable parameter spaces.

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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