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北京正负电子对撞机(BEPC)/北京谱仪(BES)在2-5GeV能区进行了两轮R值扫描测量,把该能区R值的误差降低到原有水平的一半左右. 这一结果对于精确确定QED跑动精细结构常数、进而确定Higgs粒子的质量具有重要意义,同时对μ子反常磁矩aμ的物理解释也有重要贡献.
R值测量与标准模型检验
【摘 要】
：
北京正负电子对撞机(BEPC)/北京谱仪(BES)在2-5GeV能区进行了两轮R值扫描测量,把该能区R值的误差降低到原有水平的一半左右. 这一结果对于精确确定QED跑动精细结构常数、进而
【机 构】
：
中国科学院高能物理研究所,中国高等科学技术中心
【出 处】
：
高能物理与核物理
【发表日期】
：
2004年期
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