辐射双重反跷跷板与替代规范 $U(1)_{B-L}$ 模型中的暗物质
Radiative double inverse seesaw and dark matter in an alternative gauged $U(1)_{B-L}$ model
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中文总结 AI 辅助
本文在替代规范 $U(1)_{B-L}$ 模型中提出辐射双重反跷跷板机制，引入新粒子产生微小中微子质量，并研究费米子与玻色子暗物质，发现费米子情景受青睐，玻色子情景被直接探测实验排除。
中文摘要 AI 辅助
我们在一个替代规范 $U(1)_{B-L}$ 模型中提出了双重反跷跷板机制的具体理论框架，其中微小的中微子质量根据 't Hooft 自然性判据在圈层级辐射产生。通过给右手中微子赋予非普适的 $B-L$ 电荷 $(-4, -4, 5)$，我们引入了在圈中循环以产生所需质量项的矢量样费米子和两个惰性单态标量。$U(1)_{B-L}$ 对称性的自发破缺留下了一个残余的 $Z_2$ 对称性，该对称性自然地稳定了这些新粒子作为暗物质候选者。我们系统地研究了费米子和玻色子两种暗物质情景，假设它们的相互作用主要由 $B-L$ 规范玻色子（$Z'$）介导。我们对遗迹密度、直接探测和对撞机束缚的综合分析表明，费米子暗物质情景受到强烈青睐。相比之下，通过 $Z'$ 门户的玻色子暗物质受到严重约束，并在很大程度上被最新的直接探测实验（如 LZ、PandaX-4T 和 XENONnT）所排除。
英文摘要
We propose a concrete theoretical framework for the double inverse seesaw mechanism within an alternative gauged $U(1)_{B-L}$ model, where the tiny neutrino masses emerge radiatively at the loop level in accordance with the 't Hooft naturalness criterion. By assigning non-universal $B-L$ charges of $(-4, -4, 5)$ to the right-handed neutrinos, we introduce vector-like fermions and two inert singlet scalars that circulate in the loop to generate the required mass terms. The spontaneous breaking of the $U(1)_{B-L}$ symmetry leaves a remnant $Z_2$ symmetry, which naturally stabilizes these new particles as dark matter (DM) candidates. We systematically investigate both fermionic and bosonic DM scenarios, assuming their interactions are predominantly mediated by the $B-L$ gauge boson ($Z'$). Our comprehensive analysis of the relic density, direct detection, and collider bounds reveals that the fermionic DM scenario is strongly favored. In contrast, the bosonic DM via the $Z'$ portal is severely constrained and largely ruled out by the latest direct detection experiments such as LZ, PandaX-4T, and XENONnT.
发表机构
- Henan Normal University（河南师范大学）
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