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arXiv 1009.0876physics.ins-dethep-ex
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Belle II的传播时间计数器

The time-of-propagation counter for Belle II

K. Nishimura

摘要:

在KEKB加速器的未来升级中运行的Belle II探测器将对标准模型的风味部分进行高统计精度的调查。由于带电强子的识别是实验成功的一个重要因素,传播时间(TOP)计数器已被选为Belle II桶区的主要粒子识别设备。TOP计数器是内反射切伦科夫光(DIRC)技术的一种紧凑型变体,在很大程度上依赖于微通道板光电倍增管的精密单光子定时分辨率。我们讨论了TOP操作和优化的Belle II TOP配置,预计将提供4西格玛或更好的分离的K介子和π介子的动量约为4 GeV/c的一般原则。

英文摘要:

The Belle II detector operating at the future upgrade to the KEKB accelerator will perform high-statistics precision investigations into the flavor sector of the Standard Model. As charged hadron identification is a vital element of the experiment's success, the time-of-propagation (TOP) counter has been chosen as the primary particle identification device in the barrel region of Belle II. The TOP counter is a compact variant of the detection of internally reflected Cherenkov light (DIRC) technique and relies heavily on exquisite single photon timing resolution with micro-channel plate photomultiplier tubes. We discuss the general principles of TOP operation and optimization of the Belle II TOP configuration, which is expected to provide 4 sigma or better separation of kaons and pions up to momenta of approximately 4 GeV/c.

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