北京谱仪实验上辉煌的陶-R-QCD物理
Achievement in Tau-R-QCD physics on the Beijing Spectrometer
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摘要: 北京谱仪作为高精度前沿实验,在陶粲能区做出了重要工作,包括:R值的高精度测量;陶轻子质量的测定;重子对阈值附近截面反常行为和振荡效应的观测;用粲偶素的扫描数据测量电磁作用与强作用的相位差,并且确定χc1的电子道分宽度等。这些结果为标准模型的精确检验提供了实验依据。Abstract: The Beijing Spectrometer, as a high-precision frontier experiment has performed important achievements in the tau-charm energy region, including high-precision measurements of the R value, determination of the mass of the tau lepton, observation of the anomalous behaviour and oscillatory effects of the baryon pair cross-section near the threshold, measurement of the phase difference between the electromagnetic and the strong interaction based on the scanning data of the charmoniums, and determination of the width of the electron channel fraction of χc1. These have provided accurate experimental tests of the Standard Model.
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Key words:
- tau-charm energy region /
- charm quark /
- R value /
- tau lepton /
- mass /
- baryon /
- cross-section /
- relative phase .
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