Absolute photon energy calibration for the BESⅢ EMC

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）.

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Bibliographic Details
Published inChinese physics C Vol. 34; no. 1; pp. 72 - 77
Main Author 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
Format Journal Article
LanguageEnglish
Published IOP Publishing 2010
Subjects
EMC
ψ（2S）
光子能量
北京谱仪
子事件
电磁兼容
能量刻度
Online AccessGet full text
ISSN1674-1137
0254-3052
2058-6132
DOI10.1088/1674-1137/34/1/013

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Summary: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）.
Bibliography:electromagnetic calorimeter; absolute energy calibration; π0 decay.
π0 decay.
absolute energy calibration
O572.21
11-5641/O4
electromagnetic calorimeter
TN249
ISSN:1674-1137
0254-3052
2058-6132
DOI:10.1088/1674-1137/34/1/013