论文标题
使用宇宙中微子的新探测器中微子聚类的探测
A New Probe of Relic Neutrino Clustering using Cosmogenic Neutrinos
论文作者
论文摘要
我们建议使用其对宇宙基因中微子的谐振散射进行宇宙遗物中微子（C $ν$ b）的新探测。根据最轻的中微子质量和宇宙基因中微子通量的能量光谱，可以通过$ν\ barbarν$ nihilation产生标准的模型矢量介子（例如hadronic $ρ$）的共振。这导致在宇宙基因中微子通量中具有独特的吸收特征，除了红移之外，仅由梅森质量和中微子质量确定的能量。通过数值巧合，$ρ$ - 谐振的位置与最初预测的Greisen-Zatsepin-Kuzmin（GZK）中微子通量的峰重叠，该中微子在较高的红移时提供了增强的吸收效果。我们表明，GZK中微子通量中的这种吸收特征在将来的基于无线电中微子的观测值（例如IceCube-gen2无线电）中可以观察到，只要C $ν$ B分布中存在很大的过度密度。因此，这提供了一个新的探针，可在大红移下进行c $ν$ b的聚类，这是与实验室探针（例如katrin）零红移的补充。
We propose a new probe of cosmic relic neutrinos (C$ν$B) 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 $ν\barν$ 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 absorption 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 C$ν$B distribution. This therefore provides a new probe of C$ν$B clustering at large redshifts, complementary to the laboratory probes (such as KATRIN) at zero redshift.
