Cosmic-ray neutrinos from the decay of long-lived particle and the recent IceCube result
Cosmic-ray neutrinos from the decay of long-lived particle and the recent IceCube result
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DOI：
10.1016/j.physletb.2014.04.021
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发表时间：
2013-12
影响因子：
4.4
通讯作者：
Yohei Ema;Ryusuke Jinno;T. Moroi
中科院分区：
文献类型：
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作者：
Yohei Ema;Ryusuke Jinno;T. Moroi
受最近IceCube实验结果的启发，我们研究了长寿命粒子衰变产生的高能宇宙线中微子流。由于中微子是如此透明，过去产生的高能中微子也可能对现在的中微子通量有贡献。我们指出，冰立方观测到的PeV中微子事件可能起源于比PeV重得多的粒子的衰变，如果它的寿命比现在的宇宙时间短。结果表明，负责的冰立方事件的粒子的质量可以大到10 - 10 GeV。我们还讨论了几种可能性，以获得有关的长寿粒子的寿命的信息。
Motivated by the recent IceCube result, we study high energy cosmic-ray neutrino flux from the decay of a long-lived particle. Because neutrinos are so transparent, high energy neutrinos produced in the past may also contribute to the present neutrino flux. We point out that the PeV neutrino events observed by IceCube may originate in the decay of a particle much heavier than PeV if its lifetime is shorter than the present cosmic time. It is shown that the mass of the particle responsible for the IceCube event can be as large as∼ 10 10 GeV. We also discuss several possibilities to acquire information about the lifetime of the long-lived particle.