论文标题
Presupernova中微子：祖细胞鉴定的方向敏感性和前景
Presupernova neutrinos: directional sensitivity and prospects for progenitor identification
论文作者
论文摘要
我们探讨了O（10）kt质量的当前和未来液体闪烁体中微子检测器的潜力，以在天空中定位supernova中微子信号。在附近恒星（在距离d <1 kpc）的核心崩溃之前的几个小时中，将记录数十至数百个反向β衰变事件，并且可以使用检测器中的重建拓扑结构来估算到恒星的方向。尽管反向β衰变的方向性较弱（目前可用的液体闪烁体的前进不对称性约为8％），但我们发现，对于200个事件的基准信号（对于贝特尔吉（Betelgeuse）来说是现实的），可以实现约60度的位置误差，从而有可能缩小潜在的潜在候选人候选人的列表，以使其缩小典型的典型级别的候选人。对于改善前后不对称的配置（〜40％，如锂负载的液体闪烁体所预期的那样），角度灵敏度将提高到〜15度，并且 - 当从总体事件速率获得距离上限时 - 原则上可能唯一可以唯一地识别祖细胞星。伴随早期超新星警报的任何本地化信息都将对多理智的观测值和使用崩溃的恒星进行粒子物理测试有用。
We explore the potential of current and future liquid scintillator neutrino detectors of O (10) kt mass to localize a pre-supernova neutrino signal in the sky. In the hours preceding the core collapse of a nearby star (at distance D < 1 kpc), tens to hundreds of inverse beta decay events will be recorded, and their reconstructed topology in the detector can be used to estimate the direction to the star. Although the directionality of inverse beta decay is weak (~8% forward-backward asymmetry for currently available liquid scintillators), we find that for a fiducial signal of 200 events (which is realistic for Betelgeuse), a positional error of ~60 degrees can be achieved, resulting in the possibility to narrow the list of potential stellar candidates to less than ten, typically. For a configuration with improved forward-backward asymmetry (~40%, as expected for a lithium-loaded liquid scintillator), the angular sensitivity improves to ~15 degrees, and - when a distance upper limit is obtained from the overall event rate - it is in principle possible to uniquely identify the progenitor star. Any localization information accompanying an early supernova alert will be useful to multi-messenger observations and to particle physics tests using collapsing stars.
