轴子金字塔
Axion Pyramid
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中文总结 AI 辅助
本文发现QCD相变可在轴子密度功率谱中产生金字塔形增强，放大超过3.5×10^13倍，其尺度与太阳系相当，并可通过观测约束轴子质量。
中文摘要 AI 辅助
识别出由QCD相变引起的轴子密度功率谱中明显的金字塔形增强。该增强发生在相变时的视界尺度附近，其特征共动长度尺度与太阳系大小相当，并将轴子密度扰动相对于CDM情形放大了超过3.5×10^13倍。在山顶初始条件下，与辐射的耦合触发了这一增强。该初始条件与轴子质量相关，表明在宇宙学中观测到轴子金字塔可能约束QCD轴子质量。
英文摘要
A pronounced pyramid-shaped enhancement in the axion density power spectrum induced by the QCD phase transition is identified. The enhancement occurs near the horizon scale at the transition, with a characteristic comoving length scale comparable to the size of the Solar System, and amplifies the axion density perturbation by factors exceeding $3.5 \times 10^{13}$ relative to the CDM case. Under the hilltop initial condition, coupling to radiation triggers this enhancement. The initial condition is related to the axion mass, suggesting that observation of the axion pyramid in cosmology may constrain the QCD axion mass.
发表机构
- Jeonbuk National University（全北国立大学）
- Chosun University（朝鲜大学）
- Korea Astronomy and Space Science Institute（韩国天文学与宇宙学研究所）
- Institute for Basic Science (IBS)（基础科学研究院）
机构由 AI 辅助整理，请以论文原文为准。
