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Absolute photon energy calibration for the BESⅢ EMC

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【作者】边渐鸣；何康林；李卫国；胡涛；傅成栋；黄彬；刘颖；吕绮雯；宁飞鹏；宋文博；孙胜森；徐敏；言杰；严亮；

【Author】 BIAN Jian-Ming1,2;1) HE Kang-Lin1);2) LI Wei-Guo1;3) HU Tao1 FU Cheng-Dong1 HUANG Bin1,2 LIU Ying1 L Qi-Wen4 NING Fei-Peng4 SONG Wen-Bo1,2 SUN Sheng-Sen1 XU Min3 YAN Jie3 YAN Liang1,2 1 Institute of High Energy Physics, CAS, Beijing 100049, China 2 Graduate University of Chinese Academy of Sciences, Beijing 100049, China 3 Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China 4 Shanxi University, Taiyuan 003006, China

【机构】 Institute of High Energy Physics, CAS； Graduate University of Chinese Academy of Sciences； Shanxi University； Department of Modern Physics, University of Science and Technology of China；

【摘要】 The absolute energy calibration with photons from π0’s for the BESⅢ EMC is discussed. Using 3 million hadronic events, the preliminary results are presented. Precision of about 1% in the photon energy measurement is obtained from crossing check using photons in ψ(2S)→γχc1,2(1P).更多还原

【Abstract】 The absolute energy calibration with photons from π0’s for the BESⅢ EMC is discussed. Using 3 million hadronic events, the preliminary results are presented. Precision of about 1% in the photon energy measurement is obtained from crossing check using photons in ψ(2S)→γχc1,2(1P).更多还原

【关键词】 electromagnetic calorimeter； absolute energy calibration； π0 decay.；
【Key words】 electromagnetic calorimeter； absolute energy calibration； π0 decay.；

【基金】 Supported by CAS Knowledge Innovation Project (U-602, U-34);National Natural Science Foundation of China (10491300,10491303, 10605030) ;100 Talents Program of CAS (U-25 and U-54)

【文献出处】中国物理C ,Chinese Physics C , 编辑部邮箱 ,2010年01期

【分类号】O572.212
【被引频次】1
【下载频次】37

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