用于反应堆反中微子-电子散射的水切伦科夫探测器的预期性能
Expected performance of a water Cherenkov detector for reactor antineutrino--electron scattering
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中文总结 AI 辅助
该研究评估了RENO近站点170吨水切伦科夫探测器的性能，通过两种触发场景得到反应堆能谱归一化的百分级不确定度，证明其方向信息可实现百分级灵敏度。
中文摘要 AI 辅助
我们评估了位于RENO近探测器站点的170吨水切伦科夫探测器在反应堆反中微子-电子弹性散射中的预期性能。通过约束轮廓似然拟合，从重建的反冲电子方向分布中提取反应堆能谱归一化，积分时长为365.25天。对于忽略PMT放射性的最小触发命中多重数N_prompt≥8的场景，反应堆能谱归一化的总不确定度为+1.08%/-1.07%；对于包含模拟PMT放射性成分的更严格N_prompt≥20的场景，总不确定度为+1.49%/-1.47%。这些结果表明，水切伦科夫探测器的方向信息可对反应堆弹性散射归一化提供百分级灵敏度。
英文摘要
We evaluate the expected performance of a 170-ton water Cherenkov detector for reactor antineutrino--electron elastic scattering at the RENO near-detector site. The reactor-spectrum normalization is extracted from the reconstructed recoil-electron directional distribution using a constrained profile-likelihood fit for an exposure of 365.25 days. For the minimum prompt-hit multiplicity $N_{\mathrm{prompt}}\geq8$ scenario, which neglects PMT radioactivity, the total uncertainty on the reactor-spectrum normalization is ${}^{+1.08\%}_{-1.07\%}$. For the more restrictive $N_{\mathrm{prompt}}\geq20$ scenario, which includes the simulated PMT-radioactivity components, the total uncertainty is ${}^{+1.49\%}_{-1.47\%}$. These results demonstrate that directional information from a water Cherenkov detector can provide percent-level sensitivity to the reactor elastic-scattering normalization.
