利用11.4年IceCube数据搜寻中微子双联体和三联体
Search for neutrino doublets and triplets using 11.4 years of IceCube data
AI总结:
本文利用11.4年IceCube数据,采用面向月尺度瞬态发射优化的新方法搜寻中微子双联体和三联体,结果与大气背景一致,并据此对月尺度瞬态中微子源设限。
摘要:
我们报告了对高能天体物理中微子多重态的搜寻,即基于对11.4年IceCube数据的分析,探测同一方向30天内出现的多个中微子簇。采用了一种针对月时间尺度瞬态中微子发射进行优化的新搜寻方法,从而对中微子通量具有更高的灵敏度。该结果对中微子瞬态发射敏感,在能量E≳50 TeV范围内,来自北天区的每味通量达到约10^{-10} erg cm^{-2} sec^{-1}。本次搜寻中识别出的双联体和三联体数量与大气背景假设相符,这使我们对发射时间尺度为一个月的瞬态中微子源的性质设定了限制。
英文摘要:
We report a search for high-energy astrophysical neutrino multiplets, detections of multiple neutrino clusters in the same direction within 30 days, based on an analysis of 11.4 years of IceCube data. A new search method optimized for transient neutrino emission with a monthly time scale is employed, providing a higher sensitivity to neutrino fluxes. This result is sensitive to neutrino transient emission, reaching per-flavor flux of approximately $10^{-10}\ {\rm erg}\ {\rm cm}^{-2}\ {\rm sec}^{-1}$ from the Northern sky in the energy range $E\gtrsim 50$~TeV. The number of doublets and triplets identified in this search is compatible with the atmospheric background hypothesis, which leads us to set limits on the nature of neutrino transient sources with emission timescales of one month.
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