We propose a new probe of cosmic relic neutrinos (CνB) using their resonant scattering against cosmogenic neutrinos. Depending on the lightest neutrino mass and the energy spectrum of the cosmogenic neutrino flux, a Standard Model vector meson (such as a hadronic ρ) resonance can be produced via $\nu \overline{\nu }$ annihilation. This leads to a distinct absorption feature in the cosmogenic neutrino flux at an energy solely determined by the meson mass and the neutrino mass, apart from redshift. By numerical coincidence, the position of the ρ-resonance overlaps with the originally predicted peak of the Greisen-Zatsepin-Kuzmin (GZK) neutrino flux, which offers an enhanced effect at higher redshifts. We show that this absorption feature in the GZK neutrino flux may be observable in future radio-based neutrino observatories, such as IceCube-Gen2 radio, provided there exists a large overdensity in the CνB distribution. This therefore provides a new probe of CνB clustering at large redshifts, complementary to the laboratory probes (such as KATRIN) at zero redshift.

我们提出了一种新的宇宙遗迹中微子（C ν B）探测，利用它们对宇宙中微子的共振散射。根据最轻的中微子质量和宇宙成因中微子通量的能谱，可以通过以下方式产生标准模型矢量介子（例如强子ρ ）共振$\nu \overline{\nu }$歼灭。这导致宇宙成因中微子通量的明显吸收特征，其能量仅由介子质量和中微子质量决定，除了红移。通过数值巧合，ρ共振的位置与最初预测的 Greisen-Zatsepin-Kuzmin (GZK) 中微子通量峰值重叠，这在更高的红移处提供了增强的效果。我们表明，如果 C ν B 分布中存在较大的超密度，则 GZK 中微子通量中的这种吸收特征可能会在未来的基于射电的中微子观测站（例如 IceCube-Gen2 射电）中观察到。因此，这提供了一个新的大红移 C ν B 聚类探针，与零红移的实验室探针（例如 KATRIN）互补。