标题： IceCube高能中微子数据联合拟合中的天体物理弥散中微子通量测量 显示英文标题

标题： Measurement of the astrophysical diffuse neutrino flux in a combined fit of IceCube's high energy neutrino data

摘要： 冰立方中微子天文台发现了来自天体物理起源的弥散中微子流，并在各种探测信道中测量其性质。凭借超过10年的数据，我们使用来自不同探测信道的多个数据样本，对弥散天体物理中微子谱进行联合拟合。这种方法利用了不同中微子事例签名的互补信息。首次，我们采用了一种信号与本底、探测器响应及其相应系统不确定性的协调建模方法。探测器响应在模拟过程中持续变化，以生成通用蒙特卡洛数据集，这是我们的方法的核心。我们展示了联合拟合的结果，得到了弥散天体物理中微子流性质的前所未有的精确测量。 显示英文摘要

摘要： The IceCube Neutrino Observatory has discovered a diffuse neutrino flux of astrophysical origin and measures its properties in various detection channels. With more than 10 years of data, we use multiple data samples from different detection channels for a combined fit of the diffuse astrophysical neutrino spectrum. This leverages the complementary information of different neutrino event signatures. For the first time, we use a coherent modelling of the signal and background, as well as the detector response and corresponding systematic uncertainties. The detector response is continuously varied during the simulation in order to generate a general purpose Monte Carlo set, which is central to our approach. We present a combined fit yielding a measurement of the diffuse astrophysical neutrino flux properties with unprecedented precision.