发表机构
Research Center for Particle Science and Technology, Institute of Frontier and Interdisciplinary Science, Shandong University; Key Laboratory of Particle Physics and Particle Irradiation of the Ministry of Education, Shandong University; State Key Laboratory of Dark Matter Physics, Key Laboratory for Particle Astrophysics and Cosmology (MoE), Shanghai Key Laboratory for Particle Physics and Cosmology, School of Physics and Astronomy, Shanghai Jiao Tong University; New Cornerstone Science Laboratory, Tsung-Dao Lee Institute, Shanghai Jiao Tong University; Shanghai Jiao Tong University Sichuan Research Institute（山东大学前沿交叉科学研究院粒子科学与技术研究中心; 山东大学教育部粒子物理与粒子辐照重点实验室; 上海交通大学物理与天文学院暗物质物理全国重点实验室粒子天体物理与宇宙学教育部重点实验室上海市粒子物理与宇宙学重点实验室; 上海交通大学新Cornerstone科学实验室汤川秀树研究所; 上海交通大学四川研究院）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
利用PandaX-4T液氙探测器首次搜索弥散超新星中微子背景，基于1.54吨·年曝光未发现显著超出，设定每味通量上限(2.27-2.43)×10^3 cm^{-2}s^{-1}，与当前世界最佳限制相当。
AI 中文摘要
我们首次利用中国锦屏地下实验室的PandaX-4T液氙探测器，通过相干弹性中微子-核散射搜索弥散超新星中微子背景。基于调试运行和首次科学运行总计1.54吨·年的曝光量，我们未观察到超出预期背景的显著事件过剩。因此，对于入射中微子能量高于19.3 MeV的弥散超新星中微子背景的ν_x通量（即ν_μ、反ν_μ、ν_τ、反ν_τ中的每一个），我们在90%置信水平上设定了每味中微子(2.27 - 2.43) × 10^3 cm^{-2}s^{-1}的上限。该结果与当前世界最佳限制相当。
英文摘要
We present the first search for the diffuse supernova neutrino background utilizing coherent elastic neutrino-nucleus scattering with the PandaX-4T liquid xenon detector at the China Jinping Underground Laboratory. Based on a total exposure of $1.54~\mathrm{tonne \cdot year}$ from the commissioning and first science runs, we observe no significant event excess over the expected background. We therefore set an upper limit of $(2.27 - 2.43) \times 10^3~\mathrm{cm^{-2}s^{-1}}$ per flavor at 90\% confidence level on the $ν_x$ flux (each of $ν_μ, \barν_μ, ν_τ, \barν_τ$) of the diffuse supernova neutrino background for incident neutrino energies above 19.3~MeV. The result is comparable to the current world best limit.
Comments8 pages, 3 figures
