arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1609.04286physics.ins-detastro-ph.HEastro-ph.IMhep-ex
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用Hyper-Kamiokande探测超新星中微子通量的快速时间变化

Detecting Fast Time Variations in the Supernova Neutrino Flux with Hyper-Kamiokande

Jost Migenda

摘要:

为了探测来自银河系超新星的中微子,计划中的Hyper-Kamiokande探测器将是第一个提供高事件率(约为IceCube速率的三分之一)和事件能量信息的探测器。在这篇论文中,我们使用三维计算机模拟的Garching组,以找出是否可以使用这些额外的信息,以提高在中微子通量的快速时间变化的检测前景。我们发现中微子数通量的SASI振荡的振幅与能量有关。然而,在该模拟中,某些能量箱中的较大幅度不足以抵消由较低事件率引起的增加的噪声。最后,我们推导出一个条件,当它是有利的,而不是总的信号考虑的能量箱,并表明,这个条件是满足的,如果振荡的平均中微子能量略有增加。

英文摘要:

For detection of neutrinos from galactic supernovae, the planned Hyper-Kamiokande detector will be the first detector that delivers both a high event rate (about one third of the IceCube rate) and event-by-event energy information. In this thesis, we use a three-dimensional computer simulation by the Garching group to find out whether this additional information can be used to improve the detection prospects of fast time variations in the neutrino flux. We find that the amplitude of SASI oscillations of the neutrino number flux is energy-dependent. However, in this simulation, the larger amplitude in some energy bins is not sufficient to counteract the increased noise caused by the lower event rate. Finally, we derive a condition describing when it is advantageous to consider an energy bin instead of the total signal and show that this condition is satisfied if the oscillation of the mean neutrino energy is increased slightly.

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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