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arXiv 2510.02450hep-ph
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中微子转变电偶极矩:在KM3NeT事件背景下

Neutrino transition dipole moments in light of the KM3NeT event

Universitat de València(瓦伦西亚大学);Instituto de Física Corpuscular (CSIC-Universitat de València)(粒子物理研究所(西班牙国家研究委员会-瓦伦西亚大学));University of Freiburg(弗赖堡大学)

Alejandro Muñoz-Ovalle, Stefan Vogl

AI总结:

KM3NeT观测到高能中微子事件,研究其对中微子转变磁偶极通口的影响,发现高质量惰性中微子在此背景下提供主要约束。

摘要:

2023年,KM3NeT观测到了迄今为止能量最高的中微子。最可能的估计将中微子的能量置于极端值220 PeV,且在90%的概率区间内包含高达2.6 EeV的能量。尽管现有数据无法确定信号源,但这一观测已经为检验新物理打开了独特可能。在这里,我们研究了连接活跃中微子和惰性中微子的转变磁偶极通口的后果。我们对中微子的来源保持中立,专注于局部效应。具体来说,我们研究了高效的活跃-惰性中微子转变对中微子在到达地球探测器路径上经历的能量退化的影响。我们发现,超高能中微子事件对于质量小于TeV的惰性中微子并不提供相关信息。然而,这一观测在更高质量范围内变得重要,并可以提供该范围内的主要约束。

英文摘要:

In 2023, KM3NeT observed the highest energy neutrino seen to date. The most probable estimate places the energy of the neutrino at an extreme value of 220 PeV, and energies up to 2.6 EeV are contained in the $90\%$ probability interval. Even though the source of the signal cannot be ascertained with the available data, this observation already opens unique possibilities to test new physics. Here, we study the implications for the transition magnetic dipole portal connecting active and sterile neutrinos. We remain agnostic regarding the origin of the neutrino and focus on local effects. Concretely, we study the impact of efficient active--sterile transitions on the energy degradation experienced by the neutrino along its path to the detector at Earth. We find that the ultra-high-energy neutrino event does not add relevant information for sterile neutrinos with masses less than a TeV. However, the observation becomes important at higher masses and can provide the leading constraint in that regime.

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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