发表机构
The University of Chicago; The University of Tokyo; Nankai University; Massachusetts Institute of Technology（芝加哥大学; 东京大学; 南开大学; 麻省理工学院）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文证明轴子场通过暴胀动力学产生中间波数尖峰扰动，经曲率场机制生成引力波与原初黑洞，其谱呈三角形，可解释全部暗物质，并提供多信使检验。
AI 中文摘要
我们证明，轴子场可以通过其暴胀动力学发展出在中间波数处呈尖峰状的扰动。我们计算了通过曲率场机制产生的引力波（GWs）和原初黑洞（PBHs）的相应谱。引力波谱呈现三角形形状，其紫外和红外斜率由轴子的暴胀演化决定，并可视为自由参数。在计算原初黑洞丰度时，我们适当考虑了曲率扰动与密度扰动之间的非线性关系以及由曲率场产生的原初非高斯性。这些原初黑洞可以构成全部暗物质，并伴随小尺度上的蓝倾斜等曲率扰动。引力波谱的红外斜率与暗物质等曲率扰动的幅度呈反相关，为模型提供了多信使检验。
英文摘要
We demonstrate that an axion field can develop perturbations peaked at an intermediate wavenumber through its inflationary dynamics. We compute the resultant spectrum of gravitational waves (GWs) and primordial black holes (PBHs) generated through the curvaton mechanism. The GW spectrum exhibits a triangular shape, with UV and IR slopes determined by the axion's inflationary evolution and treatable as free parameters. In computing the PBH abundance, we properly account for the nonlinear relation between curvature and density perturbations and the primordial non-Gaussianity generated by the curvaton. The PBHs can account for all of dark matter, accompanied by blue-tilted isocurvature perturbations at small scales. The IR slope of the GW spectrum is anti-correlated with the magnitude of the dark matter isocurvature perturbations, offering a multi-messenger test of the model.
Comments43 pages, 10 figures
