Precise capture rates of cosmic neutrinos and their implications on cosmology
Precise capture rates of cosmic neutrinos and their implications on cosmology
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DOI：
10.1140/epjc/s10052-021-09133-5
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发表时间：
2020-10
期刊：
影响因子：
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通讯作者：
K. Akita;Saul Hurwitz;Masahide Yamaguchi
中科院分区：
文献类型：
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作者：
K. Akita;Saul Hurwitz;Masahide Yamaguchi
我们探索的宇宙学效应的测量，如中微子光谱扭曲的中微子去耦和中微子在我们的银河系中的集群，通过宇宙中微子捕获氚的潜力。我们计算每个中微子物种的精确捕获率，包括宇宙学效应来探测它们。捕获率的精确估计也很重要，因为估计捕获率的偏差可能表明新的中微子物理学和/或宇宙的非标准演化。此外，我们还讨论了狄拉克和马约拉纳中微子的捕获率之间的精确差异，所需的能量分辨率，以检测每个中微子物种和宇宙中微子的光谱重建的方法，通过发射的电子光谱，重点是PIMMY实验。
We explore the potential of measurements of cosmological effects, such as neutrino spectral distortions from the neutrino decoupling and neutrino clustering in our Galaxy, via cosmic neutrino capture on tritium. We compute the precise capture rates of each neutrino species including such cosmological effects to probe them. These precise estimates of capture rates are also important in that the would-be deviation of the estimated capture rate could suggest new neutrino physics and/or a non-standard evolution of the universe. In addition, we discuss the precise differences between the capture rates of Dirac and Majorana neutrinos for each species, the required energy resolutions to detect each neutrino species and the method of reconstruction of the spectrum of cosmic neutrinos via the spectrum of emitted electrons, with emphasis on the PTOLEMY experiment.