论文标题
Daya湾的高能反应堆抗逆转录病毒的首次测量
First measurement of high-energy reactor antineutrinos at Daya Bay
论文作者
论文摘要
这封信报告了Daya湾的高能量反应堆抗抗瑞杆菌的首次测量,在1958天的数据收集中,在8-12 〜MEV的及时能量区域中有近9000个反向β衰减候选者。多元分析用于将2500个信号事件与背景统计分开。在10〜MEV的中微子能量中,没有反应堆抗神经的假说被拒绝,其显着性为6.2标准偏差。与最近的模型预测相比,观察到8-11〜MEV的及时能量区域中的29 \%抗毒剂不足。我们为7 MEV高于7 MEV的展开的抗肿瘤光谱作为其他实验的基于数据的参考。该结果提供了从商用反应器中几个高$q_β$同位素的抗肿瘤产生的首次直接观察。
This Letter reports the first measurement of high-energy reactor antineutrinos at Daya Bay, with nearly 9000 inverse beta decay candidates in the prompt energy region of 8-12~MeV observed over 1958 days of data collection. A multivariate analysis is used to separate 2500 signal events from background statistically. The hypothesis of no reactor antineutrinos with neutrino energy above 10~MeV is rejected with a significance of 6.2 standard deviations. A 29\% antineutrino flux deficit in the prompt energy region of 8-11~MeV is observed compared to a recent model prediction. We provide the unfolded antineutrino spectrum above 7 MeV as a data-based reference for other experiments. This result provides the first direct observation of the production of antineutrinos from several high-$Q_β$ isotopes in commercial reactors.