标题： 银河系超新星中微子在XMASS中与氙核相干散射的可检测性 显示英文标题

标题： Detectability of galactic supernova neutrinos coherently scattered on xenon nuclei in XMASS

摘要： 相干弹性中微子-核散射（CEvNS）在恒星的最终演化中起着关键作用。 它的探测在天体粒子物理中具有重要意义。 在所有可用的中微子源中，银河系超新星在兆电子伏特范围内提供最高的中微子通量。 在所有液态氙暗物质实验中，XMASS具有最大的灵敏体积和光产率。 研究了在当前的XMASS探测器中通过在氙核上的CEvNS过程探测银河系超新星的可能性。 在距离地球10~kpc的超新星爆炸后约18秒内积分的总事件数预计在3.5到21.1之间，具体取决于用于预测中微子通量的超新星模型，而在同一时间窗口内的背景事件数被测量为可忽略不计。 所有这些都导致了利用银河系超新星和XMASS探测器组合首次实验探测CEvNS的极高可能性。 如果超新星爆炸像参宿四那样接近，可观测的总事件数可以超过一万个，使得通过检查XMASS中中微子事件率的演变来区分不同的超新星模型成为可能。 显示英文摘要

摘要： The coherent elastic neutrino-nucleus scattering (CEvNS) plays a crucial role at the final evolution of stars. The detection of it would be of importance in astroparticle physics. Among all available neutrino sources, galactic supernovae give the highest neutrino flux in the MeV range. Among all liquid xenon dark matter experiments, XMASS has the largest sensitive volume and light yield. The possibility to detect galactic supernova via the CEvNS-process on xenon nuclei in the current XMASS detector was investigated. The total number of events integrated in about 18 seconds after the explosion of a supernova 10~kpc away from the Earth was expected to be from 3.5 to 21.1, depending on the supernova model used to predict the neutrino flux, while the number of background events in the same time window was measured to be negligible. All lead to very high possibility to detect CEvNS experimentally for the first time utilizing the combination of galactic supernovae and the XMASS detector. In case of a supernova explosion as close as Betelgeuse, the total observable events can be more than ten thousand, making it possible to distinguish different supernova models by examining the evolution of neutrino event rate in XMASS.