Absolute photon energy calibration for the BESⅢ EMC
Absolute photon energy calibration for the BESⅢ EMC
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).
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).
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)
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