Reduction of ultra-high energy neutrino flux for spacelike neutrinos from extragalactic sources

IF 10.2 4区物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS

Journal of High Energy Astrophysics Pub Date : 2024-02-13 DOI:10.1016/j.jheap.2024.02.001

J. Rembieliński , J. Ciborowski

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引用次数: 0

Abstract

Assuming that neutrinos are spacelike (tachyonic) fermions, we calculate width for the kinematically allowed, lepton number conserving, three-body decay $ν_{α} \to ν_{α} ν_{β} {\bar{ν}}_{β}$ in the Standard Model. Decays of tachyonic neutrinos over cosmological distances can lead to a reduction of the neutrino flux in the high-energy end of the spectrum. We estimate upper limits on the spacelike neutrino mass based on the PeV-energy cosmological neutrino events observed in the IceCube experiment. These limits are close to those deduced from the measurements of $m_{ν}^{2}$ in the tritium-decay experiment KATRIN.

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银河系外来源的空间类中微子的超高能中微子通量的减少

假定中微子是空间似（超速）费米子，我们计算了标准模型中运动学上允许的、轻子数目守恒的三体衰变να→νανβν¯β的宽度。超速中微子在宇宙学距离上的衰变会导致频谱高能端的中微子通量减少。我们根据冰立方（IceCube）实验观测到的PeV能量宇宙学中微子事件，估计了类空间中微子质量的上限。这些限值与氚衰变实验 KATRIN 中的 mν2 测量值相近。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of High Energy Astrophysics Earth and Planetary Sciences-Space and Planetary Science

CiteScore

9.70

自引率

5.30%

发文量

审稿时长

65 days

期刊介绍： The journal welcomes manuscripts on theoretical models, simulations, and observations of highly energetic astrophysical objects both in our Galaxy and beyond. Among those, black holes at all scales, neutron stars, pulsars and their nebula, binaries, novae and supernovae, their remnants, active galaxies, and clusters are just a few examples. The journal will consider research across the whole electromagnetic spectrum, as well as research using various messengers, such as gravitational waves or neutrinos. Effects of high-energy phenomena on cosmology and star-formation, results from dedicated surveys expanding the knowledge of extreme environments, and astrophysical implications of dark matter are also welcomed topics.