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arXiv 0909.5410hep-ph
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赝狄拉克中微子方案:中微子望远镜中的宇宙中微子

Pseudo-Dirac Neutrino Scenario: Cosmic Neutrinos at Neutrino Telescopes

Arman Esmaili

摘要:

在大质量中微子的“伪狄拉克”方案中,假设存在与活跃中微子质量几乎简并的不育中微子。这些无菌中微子的存在可以影响从天体经过长距离旅行后到达地球的宇宙中微子的味道组成。我们通过分析$μ$轨道事件与类中微子事件的比值,来考察像冰立方这样的中微子望远镜探测非常微小的质量平方差10^(-12)eV^2<Δm^2<10^(-19)eV^2的前景。考虑到各种来源的不确定性,进入这个分析,我们研究中微子望远镜的能力,以验证伪狄拉克中微子的情况下,特别是区分它从传统的情况下,没有无菌中微子的有效性。我们还讨论了我们的结果的鲁棒性的不确定性的中微子在源的初始风味比。

英文摘要:

Within the "pseudo-Dirac" scenario for massive neutrinos the existence of sterile neutrinos which are almost degenerate in mass with the active ones is hypothesized. The presence of these sterile neutrinos can affect the flavor composition of cosmic neutrinos arriving at Earth after traveling large distances from astrophysical objects. We examine the prospects of neutrino telescopes such as IceCube to probe the very tiny mass squared differences 10^(-12) eV^2<Δm^2<10^(-19) eV^2, by analyzing the ratio of $μ$-track events to shower-like events. Considering various sources of uncertainties which enter this analysis, we examine the capability of neutrino telescopes to verify the validity of the pseudo-Dirac neutrino scenario and especially to discriminate it from the conventional scenario with no sterile neutrino. We also discuss the robustness of our results with respect to the uncertainties in the initial flavor ratio of neutrinos at the source.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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