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引用次数: 0
摘要
最近,"冰立方 "合作组织在 NGC 1068 方向上观测到了中微子过量,而且具有很高的统计意义。这是继发现源自耀星 TXS 0506+056 的可变发射之后,第二次探测到天体物理中微子点源。这些中微子源发射的中微子在到达地球的途中穿越了巨大的、确定的距离。这使它们成为测试中微子领域新物理学的一个很有前途的工具。我们考虑了与宇宙中微子背景的秘密相互作用,并讨论了它们对中微子点源通量的影响。对 NGC 1068 和 TXS 0506+056 辐射的观测可以用来限制相互作用的强度。我们发现,我们对中微子绝对质量的无知会产生很大的影响,因此,我们提出了两种基准情景下的极限,即中微子质量总和的下限和上限。
Testing secret interaction with astrophysical neutrino point sources
Recently, the IceCube collaboration observed a neutrino excess in the direction of NGC 1068 with high statistical significance. This constitutes the second detection of an astrophysical neutrino point source after the discovery of a variable emission originating from the blazar TXS 0506+056. Neutrinos emitted by these sources traverse huge, well-determined distances on their way to Earth. This makes them a promising tool to test new physics in the neutrino sector. We consider secret interactions with the cosmic neutrino background and discuss their impact on the flux of neutrino point sources. The observation of emission from NGC 1068 and TXS 0506+056 can then be used to put limits on the strength of the interaction. We find that our ignorance of the absolute neutrino masses has a strong impact and, therefore, we present limits in two benchmark scenarios with the sum of the neutrino masses around their lower and upper limits.
期刊介绍:
Journal of Cosmology and Astroparticle Physics (JCAP) encompasses theoretical, observational and experimental areas as well as computation and simulation. The journal covers the latest developments in the theory of all fundamental interactions and their cosmological implications (e.g. M-theory and cosmology, brane cosmology). JCAP''s coverage also includes topics such as formation, dynamics and clustering of galaxies, pre-galactic star formation, x-ray astronomy, radio astronomy, gravitational lensing, active galactic nuclei, intergalactic and interstellar matter.