arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2007.14705physics.ins-detastro-ph.IMhep-exhep-ph
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未来水基液体Scintillator探测器Theia探测弥散超新星中微子背景

Detecting the Diffuse Supernova Neutrino Background in the future Water-based Liquid Scintillator Detector Theia

Julia Sawatzki, Michael Wurm, Daniel Kresse

摘要:

基于水基液体闪烁器(WbLS)的大规模中微子观测站将非常适合于测量漫射超新星中微子背景(DSNB)。WbLS技术提供了高信号效率和有效的抑制,否则压倒性的背景从中性流相互作用的大气中微子。为了说明这一点,我们调查的DSNB的灵敏度为两种配置的未来Theia探测器通过开发预期的信号和背景抑制效率沿一个完整的分析链。基于对剩余信号和背景速率的统计分析,我们发现,对于标准模型假设,190 kt $\cdot$年的相当适度的暴露将足以声称微弱DSNB信号的($5σ$)发现。我们的结论是,与其他实验技术相比,WbLS提供了最高的信号效率超过80%和最好的信号显着性超过背景。

英文摘要:

A large-scale neutrino observatory based on Water-based Liquid Scintillator (WbLS) will be excellently suited for a measurement of the Diffuse Supernova Neutrino Background (DSNB). The WbLS technique offers high signal efficiency and effective suppression of the otherwise overwhelming background from neutral-current interactions of atmospheric neutrinos. To illustrate this, we investigate the DSNB sensitivity for two configurations of the future Theia detector by developing the expected signal and background rejection efficiencies along a full analysis chain. Based on a statistical analysis of the remaining signal and background rates, we find that a rather moderate exposure of 190kt$\cdot$yrs will be sufficient to claim a ($5σ$) discovery of the faint DSNB signal for standard model assumptions. We conclude that, in comparison with other experimental techniques, WbLS offers the highest signal efficiency of more than 80\% and best signal significance over background.

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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